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1、用最短距离聚类法对35个城市综合实力进行系统聚类分析：首先打来spss软件，导入数据，如下图。
选择Analysize---Classify---Hierarchical Cluster，打开系统聚类的分析的窗口。
然后将要分析的变量选入Variable的框内。
选择Plots，选中复选框Dendrogram，点击Continue。
选择Method按钮，在Cluster Method中选择Nearest Neighbour，即最短距离聚类，在Measure 的Interval中选择Euclidean distance, 选择Continue。
最后点击OK。
在Output的窗口中出现分析的结果，最短距离聚类谱系图如下：* * * * * * H I E R A R C H I C A L C L U S T E R A N A L Y S I S * * * * * * Dendrogram using Single LinkageRescaled Distance Cluster CombineC A S E 0 5 10 15 20 25 Label Num +---------+---------+---------+---------+---------+33 ⇩34 ⇩▫26 ⇩▫5 ⇩▫25 ⇩▫14 ⇩▫17 ⇩▫29 ⇩▫32 ⇩⇳⇩4 ⇩▫⇔35 ⇩⇔22 ⇩✗⇩▫30 ⇩⇔15 ⇩⇔18 ⇩▫⇔8 ⇩⇳⇩▫20 ⇩⇔31 ⇩⇩⇩▫21 ⇩⇩⇩▫3 ⇩⇩⇩⇳⇩28 ⇩⇩⇩▫⇔9 ⇩⇩⇩▫⇔7 ⇩⇩⇩⇔13 ⇩⇩⇩⇔19 ⇩⇩⇩⇳⇩▫11 ⇩⇩⇩▫⇔12 ⇩⇩⇩▫⇩⇩⇩⇩⇩⇩⇩16 ⇩⇩⇩⇩⇩▫▫⇩6 ⇩⇩⇩⇩⇩⇔⇔2 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩▫⇔24 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩▫⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩23 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩▫▫⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩1 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇔⇔27 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇔10 ⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩⇩2、用最远距离聚类法对35个城市综合实力进行系统聚类分析：前面的步骤和上面一样，在Method的窗口中选择Furthest neighbour，其他不变，点击continue，最后点击OK。
ArcGIS应用之基于密度的聚类分析我们生活在数据大爆炸时代，每时每刻都在产生海量的数据如视频，文本，图像和博客等。
由于数据的类型和大小已经超出了人们传统手工处理的能力围。
聚类，作为一种最常见的无监督学习技术，可以帮助人们给数据自动打标签，已经获得了广泛应用。
聚类的目的就是把不同的数据点按照它们的相似与相异度分割成不同的簇（注意：簇就是把数据划分后的子集），确保每个簇中的数据都是尽可能相似，而不同的簇里的数据尽可能的相异。
从模式识别的角度来讲，聚类就是在发现数据中潜在的模式，帮助人们进行分组归类以达到更好理解数据的分布规律。
今天要跟大家分享的这个工具就跟聚类有关，它是ArcGIS中一个空间模式识别工具——基于密度的聚类分析。
基于密度的聚类工具的工作原理是检测点集中的区域以及被空的或稀疏的区域所分隔的区域。
不属于聚类的点将被标记为噪点。
一、聚类的应用•城市供水网络是一种重要的隐形地下资产。
管道破裂和爆裂的聚类可以指明潜在的问题。
使用基于密度的聚类工具，工程师可以找到这些聚类的位置并对供水网络中的高危区域抢先采取行动。
•假设您拥有NBA 球员所有成功的和失败的投篮位置数据。
基于密度的聚类可以显示每名球员成功与失败投篮位置的不同模式。
然后可利用此信息告知比赛战术。
•假设您正在研究一种特别的害虫传播疾病，并且有一个代表您研究区域家庭的点数据集，其中有些家庭已经被感染，有些家庭尚未被感染。
通过使用基于密度的聚类工具，您可以确定受害家庭的最大聚类，以帮助确定一个区域以开始害虫的处理和消灭。
•可对自然灾害或恐怖袭击之后的地理定位推文进行聚类，根据所确定的聚类大小和位置报告救援和疏散需求。
•聚类可以将大规模的客户数据按照客户喜好进行归类，比如下图1展示了聚类后发现了3个簇。
图1 聚类的应用举例二、功能定义聚类算法很多，包括基于划分的聚类算法（如：k-means），基于层次的聚类算法（如：BIRCH），基于密度的聚类算法（如：DBSCAN），基于网格的聚类算法( 如：STING )等等。
如何进行地理信息系统空间分析与模拟仿真地理信息系统（Geographic Information System，简称GIS）是一种用来存储、管理、分析和展示地理数据的工具。
它的应用广泛，包括城市规划、环境保护、农业决策等。
在这篇文章中，我们将探讨如何进行地理信息系统空间分析与模拟仿真，以及它们在解决现实问题中的应用。
首先，我们需要了解GIS空间分析的基本概念。
空间分析是指在地理空间中对数据进行处理和分析的方法。
它可以帮助我们发现地理现象之间的相互关系，并对其进行预测和模拟。
空间分析主要包括空间关联、空间插值、空间统计等技术。
空间关联分析是研究地理现象之间的相关性的一种方法。
它可以帮助我们找出地理现象之间的空间模式，并通过计算他们之间的联系程度来预测未来的发展趋势。
例如，在城市规划中，我们可以通过分析人口分布和交通网络之间的空间关联关系来评估交通拥堵的可能性，从而制定合理的交通规划策略。
空间插值是一种通过已知数据点推测未知位置上值的方法。
常用的插值方法有反距离加权插值法和克里金插值法等。
在环境保护领域，我们可以通过收集一些水质监测站的数据，利用空间插值方法预测其他未监测点的水质状况，从而制定有效的水资源保护措施。
空间统计是一种通过统计方法研究地理现象之间的空间分布和空间相关性的技术。
它可以帮助我们判断地理现象是否呈现出显著的空间聚集性或随机性，从而为制定决策提供科学依据。
例如，在农业决策中，我们可以利用空间统计方法分析土壤养分分布的空间异质性，制定合理的施肥方案。
除了空间分析外，GIS还可以进行模拟仿真，通过建立模型来模拟和预测地理现象的发展变化。
模拟仿真可以帮助我们预测自然灾害、城市扩张等事件的可能影响，并为制定应对措施提供科学支持。
例如，通过建立一个城市扩张模型，我们可以模拟未来几十年内城市的发展方向和规模，并预测其对土地利用、环境质量等方面的影响，从而为城市规划决策提供参考。
在进行GIS空间分析与模拟仿真时，我们需要注意以下几点。
基于GIS的空间聚类算法研究摘要：随着地理信息系统（GIS）技术的快速发展，越来越多的空间数据被应用于各种领域的研究和决策。
空间聚类算法是一种重要的数据挖掘技术，在GIS领域也得到了广泛的应用。
本文主要探讨了基于GIS的空间聚类算法的研究现状和发展趋势，对当前常用的几种空间聚类算法进行了比较和总结，并对其在不同领域的应用进行了探讨，最后对未来的研究方向提出了展望。
关键词：GIS，空间聚类，数据挖掘技术，研究现状，发展趋势一、引言地理信息系统（GIS）技术是一种将空间数据与属性数据相结合的综合信息处理技术，它已经被广泛应用于城市规划、环境管理、资源监测等领域。
随着大数据时代的到来，越来越多的空间数据被收集和处理，怎样高效地从中挖掘出有用的信息成为了一个热门的研究方向。
空间聚类算法作为一种重要的数据挖掘技术在GIS领域得到了广泛的应用和研究。
二、常用的空间聚类算法1.基于密度的聚类算法基于密度的聚类算法主要通过计算数据点的密度来判断其是否属于一个簇。
其中最著名的算法是DBSCAN（Density-Based Spatial Clustering of Applications with Noise）算法，该算法通过将空间数据点划分为核心点、边界点和噪音点，实现了对不同密度的空间数据点进行聚类。
2.基于网格的聚类算法基于网格的聚类算法主要是将空间数据划分为一系列的网格，然后根据网格中的数据点数量来进行聚类。
其中一种常用的算法是STING （Statistical Information Grid）算法，该算法通过计算每个网格中数据点的均值和标准差来判断其是否属于一个簇。
3.基于层次的聚类算法基于层次的聚类算法主要是通过计算数据点之间的相似性来判断其是否属于一个簇，并将数据点逐级聚合成簇。
其中一种常用的算法是BIRCH （Balanced Iterative Reducing and Clustering using Hierarchies）算法，该算法通过构建一棵多叉树来实现对空间数据点的层次聚类。
GIS空间分析在选址中的应用—以在武汉建迪士尼乐园为例姓名：王好峰学号：2009301110005 既然要在武汉建迪士尼乐园，我们首先需要对迪士尼乐园做一个合适的定位，同时针对其特点作出合理的需求分析。
结合所查阅的资料以及我个人的认识，我认为其选址应充分考虑以下几项因素：1、空间每个选址对象的建立都需要占据一定的面积，选址的对象与目的不同，对面积的要求就有所不同，很多时候都要进行面积的量算。
同时，我们还应合理分析其所需的区位条件，从而进行合理的选址。
通过对已建的5个迪士尼乐园以及正在规划的上海迪士尼乐园的占地面积进行分析，其占地面积都在100公顷以上，同时还需要规划出足够的空间留待以后的扩建等等，因此初步估计所需面积至少在300公顷。
因此，我们首先要在武汉周围寻找这样的一个空间，运用面积度量算法测量其空地面积，然后在武汉市地图上将这些符合面积需求的区域标识出来，然后进行下一步—区位条件分析。
迪士尼乐园作为一个大型的娱乐场所，一般情况下总要依山傍水，给游客营造一个舒适自然的氛围。
武汉市有山有水，这一点很好的满足了需求。
同时，我们也需要充分考虑地形、地质、水文等多方面的因素（可视化空间查询分析），因此，在上步得到的各个区位中，我们要首先寻找出那些具有良好自然条件的区域并进行合理的评估，选择其中合适的区位进行标识。
这里，我们可以运用各种数据进行坡度坡向分析、缓冲区分析、叠置分析等等。
另外，我们还应该考虑其社会区位条件。
例如水、电的供应，与城市的距离等等。
这些都需要我们运用已知数据去进行合理的空间分析，从而选取合适的空间位置。
同时，我们要确保一个通畅合理的垃圾处理方案，从而使得建筑内的各种垃圾得到合理以及快速的处理（最短路径分析）。
2、安全性因素在进行各种建筑物规划的时候，我们首要考虑的往往是也必须是安全。
安全是进行合理选址的必要前提。
a.自然因素。
武汉是一个多雨的城市，也因此每年都面临着雨水过多排泄不通的问题,甚至偶尔面临着洪水的威胁。
arcgis pro 聚类方法ArcGIS Pro是一款功能强大的地理信息系统软件，其中包含了许多聚类方法，用于处理和分析空间数据。
本文将介绍ArcGIS Pro中常用的聚类方法，包括K均值聚类、DBSCAN聚类和层次聚类，以及它们的应用场景和使用方法。
一、K均值聚类K均值聚类是一种常用的聚类方法，它将数据集划分为K个簇，使得每个样本点都属于离其最近的簇。
在ArcGIS Pro中，可以通过K 均值聚类工具来实现这一功能。
用户需要指定簇的数量K，然后根据数据集的特征进行聚类分析。
K均值聚类适用于数据点分布比较均匀的情况，例如对城市人口进行聚类分析，将人口分为不同的群体。
二、DBSCAN聚类DBSCAN（Density-Based Spatial Clustering of Applications with Noise）聚类是一种基于密度的聚类方法，它将数据集划分为若干个密度相连的簇。
在ArcGIS Pro中，可以通过DBSCAN聚类工具来实现这一功能。
用户需要指定邻域半径和邻域中最小样本点数，然后根据数据点的密度进行聚类分析。
DBSCAN聚类适用于数据点分布不均匀的情况，例如对地震数据进行聚类分析，将地震点划分为不同的震源群。
三、层次聚类层次聚类是一种自下而上的聚类方法，它将数据集中的每个样本点看作一个初始簇，然后通过计算相似度来合并簇，最终形成一个层次结构。
在ArcGIS Pro中，可以通过层次聚类工具来实现这一功能。
用户可以选择不同的相似度度量方法和合并策略，根据数据集的特征进行聚类分析。
层次聚类适用于数据点之间具有明显层次结构的情况，例如对植被类型进行聚类分析，将不同的植被形成层次结构。
四、聚类方法的应用场景聚类方法在地理信息系统中有着广泛的应用。
例如，在城市规划中，可以利用K均值聚类方法对城市人口进行聚类分析，以便制定相应的规划和发展策略。
在环境监测中，可以利用DBSCAN聚类方法对污染点进行聚类分析，以便确定污染源和采取相应的治理措施。
GIS空间分析原理与方法用空间聚类分析中国南部地名实验九、用空间聚类法分析中国南部地名—xxxxxxxx xxx一、实验目的通过对本实习的学习，应达到以下几个目的:(1) 加深对空间聚类分析基本原理、方法的认识;(2) 熟练掌握ARCGIS下进行空间聚类分析的技术方法。
(3) 结合实际、掌握利用空间聚类分析方法解决地学空间分析问题的能力。
二、实验准备软件准备:ArcMap数据准备:钦州市所有乡镇的点数据qztai;钦州市留个县的面数据qzcnty。
三、实验内容及步骤用ArcGIS准备SaTScan软件需要的数据 3.13.1.1 将e00文件转为coverage文件(1)双击ArcCatalog—View——Toolsbars——ArcView 8X Tools——Import from InterchangeFile。
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Closeto case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two topbolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play should comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements: pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ringShi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle shall not has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing, preloading重计算坐标:ng the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if theretween two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed alodegree angle, the interface b-following requirements: pressure filling when sealing, packing ring interfaces should be cut into 45 hould comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to theplay sseal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial n and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the tensioell, shell double shell pump Assembly should be according to the provisions of the technical file; two top bolts tighten the t allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shed by the machining precision, the contact surfaces are generally nowalled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guarante-contact rate, shangwa 60%, Xia WA 70%. Check the pump for thinhe angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of tpreloading ot has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing,all nand filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle sh1filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland 16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-no provisions, shall conform to the requirements in table 3e are 4GIS空间分析原理与方法实验九3.1.4 将qztai图层属性表导出(1)右击属性表下方的Options:(2选择Export.(3)设置导出文件名为qztai.dbfangle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of the5 contact rate, shangwa 60%, Xia WA 70%. Check the pump for thin-walled tile Assembly shall meet the following requirements: bearing and shaftcontact clearance and access should be guaranteed by the machining precision, the contact surfaces are generally not allowed to ... Closeto case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two topbolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play should comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements: pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe.Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle shall not has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing, preloadingdegree angle, the interface b-following requirements: pressurefilling when sealing, packing ring interfaces should be cut into 45 hould comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to theplay sseal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial n and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the tensioell, shell double shell pump Assemblyshould be according to the provisions of the technical file; two topbolts tighten the t allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 theinner shed by the machining precision, the contact surfaces aregenerally nowalled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guarante-contact rate, shangwa 60%, Xia WA 70%. Check the pump for thinhe angleof 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of tpreloading ot has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing,all nand filler box0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle sh1 filler ring and sleeve1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland 16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm-16, packing after pressing, packing ring into the liquid and theliquid pipe. Table 3-no provisions, shall conform to the requirements in table 3e are ng the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if theretween two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed alo6GIS空间分析原理与方法实验九3.2 用SaTScan执行空间聚类分析3.2.1 运行软件3.2.2 使用Import Wizard来定义事件文件参数配置如图所示:angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of the7 contact rate, shangwa 60%, Xia WA 70%. Check the pump for thin-walled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guaranteed by the machining precision, the contact surfaces are generally not allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two top bolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play shouldcomply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements: pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle shall not has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing, preloadingetween two rings should be staggered 90 ?, filler rings should notbe too tight, pressure should be uniformly distributed alodegree angle, the interface b-following requirements: pressure filling when sealing, packing ring interfaces should be cut into 45 hould comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to theplay sseal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible,the rotor axial n and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the tensioell, shell double shell pump Assembly should be according to the provisions of the technical file; two top bolts tighten the t allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shed by the machining precision, the contact surfaces are generally nowalled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guarante-contact rate, shangwa 60%, Xia WA 70%. Check the pump for thinhe angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of tpreloading ot has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing,all nand filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle sh1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland 16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-no provisions, shall conform to the requirements in table 3e are ng the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if ther8GIS空间分析原理与方法实验九3.2.3 定义非事件文件盒坐标文件配置如图所示:angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of the9 contact rate, shangwa 60%, Xia WA 70%. Check the pump for thin-walled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guaranteed by the machiningprecision, the contact surfaces are generally not allowed to ... Closeto case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two topbolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play should comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements: pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle shall not has twisted deformation and injury, and rightselect pre pressure volume. When used with a fixed flange seals and sealing, preloading配置后的结果图:ng the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if theretween two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed alodegree angle, the interface b-following requirements: pressure filling when sealing, packing ring interfaces should be cut into 45 hould comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to theplay sseal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial n and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the tensioell, shell double shell pump Assembly should be according to the provisions of the technical file; two top bolts tighten the t allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shed by the machining precision, the contact surfaces are generally nowalled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guarante-contact rate, shangwa 60%, Xia WA 70%. Check the pump for thinhe angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of tpreloading ot has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing,all nand filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle sh1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland 16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm-16, packing after pressing, packing ring intothe liquid and the liquid pipe. Table 3-no provisions, shall conform to the requirements in table 3e are 10GIS空间分析原理与方法实验九angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of the11 contact rate, shangwa 60%, Xia WA 70%. Check the pump for thin-walled tileAssembly shall meet the following requirements: bearing and shaftcontact clearance and access should be guaranteed by the machining precision, the contact surfaces are generally not allowed to ... Closeto case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two topbolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play should comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements: pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi,sealed circle shall not has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing, preloading3.2.4 执行空间聚类分析3.3 分析结果的制图3.3.1 数据准备双击ArcMap，加载数据.-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-no provisions, shall conform to the requirements in table 3e are ng the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if theretween two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed alodegree angle, the interface b-following requirements: pressure filling when sealing, packing ring interfaces should be cut into 45 hould comply with the technicalprovisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to theplay sseal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial n and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the tensioell, shell double shell pump Assembly should be according to the provisions of the technical file; two top bolts tighten the t allowed to ... Close to case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shed by the machining precision, the contact surfaces are generally nowalled tile Assembly shall meet the following requirements: bearing and shaft contact clearance and access should be guarante-contact rate, shangwa 60%, Xia WA 70%. Check the pump for thinhe angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of tpreloading ot has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing,all nand filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle sh1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland 16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm12GIS空间分析原理与方法实验九数据连接:angle of 150 ? w under. When grease lubrication, w on contact angle 120 ?, contact angle of 140 ? w under. Contact angle of the13 contact rate, shangwa 60%, Xia WA 70%. Check the pump for thin-walled tile Assembly shall meet the following requirements: bearing and shaftcontact clearance and access should be guaranteed by the machining precision, the contact surfaces are generally not allowed to ... Closeto case, the width of the impeller outlet should be within the width guide vanes. 3.8.2.5 the inner shell, shell double shell pump Assembly should be according to the provisions of the technical file; two topbolts tighten the tension and spiral angle should comply with the design requirements. 3.8.3 seal Assembly 3.8.3.1 overall delivery of the pump, the seal assembly qualified, generally without disassembly, but to move the rotor, the rotor should be flexible, the rotor axial play should comply with the technical provisions of the. 3.8.3.2 Assembly seal if necessary, should be carried out according to the following requirements:pressure filling when sealing, packing ring interfaces should be cutinto 45-degree angle, the interface between two rings should be staggered 90 ?, filler rings should not be too tight, pressure should be uniformly distributed along the circumference of the gland. Assembling axial total gap filler seal shall conform to the technical documents, if there are no provisions, shall conform to the requirements in table 3-16, packing after pressing, packing ring into the liquid and the liquid pipe. Table 3-16 group filling material sealed of requirements serial number assembled pieces name radial total clearance mm 1 filler ring and sleeve 1.00~1.50 2 filler ring and filler box 0.15~0.20 3 filler gland and sleeve 0.75~1.00 4 filler gland and filler box 0.10~0.30 5 bottom ring Shi end of ring and sleeve 0.70~1.00 with "o" type sealed circle Shi, sealed circle shall not has twisted deformation and injury, and right select pre pressure volume. When used with a fixed flange seals and sealing, preloading。
ArcgisforJS之Cluster聚类分析的实现在做项⽬的时候，碰见了这样⼀个问题：给地图上标注点对象，数据是从来的，包含XY坐标信息的，通过graphic和graphiclayer 的⽅式添加到地图上，其中有⼀个对象的数量很多，上万了吧，通过上述的⽅式⽆法在地图上进⾏展⽰，就想到了聚类，当时由于技术和时间的关系，没有实现，最近，稍微有点先下时间，就⼜想起这事，继续研究，终于，皇天不负有⼼⼈，出来了，出来的第⼀时间写出来，以便⼤家使⽤。
⾸先，看看实现后的效果：初始化状态点击对象显⽰详细对象和信息框放⼤后的效果效果就是上⾯所⽰的这个样⼦的，下⾯说说实现的步骤与思路：1、数据正常数据的来源是源⾃数据库的JSON数据，在本例⼦中，新建了⼀个变量⽤来模拟JSON数据，我所⽤的数据是全国的市县级的点状数据转换来的，如下：2、clusterLayer的封装根据需求，对GraphicsLayer进⾏了封装为clusterLayer，来源为Arcgis for JS官⽅实例，对其中个别代码做了修改，源代码如下：[javascript]1. define([2. "dojo/_base/declare",3. "dojo/_base/array",4. "esri/Color",5. "dojo/_base/connect",6.7. "esri/SpatialReference",8. "esri/geometry/Point",9. "esri/graphic",10. "esri/symbols/SimpleMarkerSymbol",11. "esri/symbols/TextSymbol",12.13. "esri/dijit/PopupTemplate",14. "esri/layers/GraphicsLayer"15. ], function (16. declare, arrayUtils, Color, connect,17. SpatialReference, Point, Graphic, SimpleMarkerSymbol, TextSymbol,18. PopupTemplate, GraphicsLayer19. ) {20. return declare([GraphicsLayer], {21. constructor: function(options) {22. // options:23. // data: Object[]24. // Array of objects. Required. Object are required to have properties named x, y and attributes. The x and y coordinates have to be numbers that represent a points coordinates.25. // distance: Number?26. // Optional. The max number of pixels between points to group points in the same cluster. Default value is 50.27. // labelColor: String?28. // Optional. Hex string or array of rgba values used as the color for cluster labels. Default value is #fff (white).29. // labelOffset: String?30. // Optional. Number of pixels to shift a cluster label vertically. Defaults to -5 to align labels with circle symbols. Does not work in IE.31. // resolution: Number32. // Required. Width of a pixel in map coordinates. Example of how to calculate:33. // map.extent.getWidth() / map.width34. // showSingles: Boolean?35. // Optional. Whether or graphics should be displayed when a cluster graphic is clicked. Default is true.36. // singleSymbol: MarkerSymbol?37. // Marker Symbol (picture or simple). Optional. Symbol to use for graphics that represent single points. Default is a small gray SimpleMarkerSymbol.38. // singleTemplate: PopupTemplate?39. // PopupTemplate</a>. Optional. Popup template used to format attributes for graphics that represent single points. Default shows all attributes as "attribute = value" (not recommended).40. // maxSingles: Number?41. // Optional. Threshold for whether or not to show graphics for points in a cluster. Default is 1000.42. // webmap: Boolean?43. // Optional. Whether or not the map is from an webmap. Default is false.44. // spatialReference: SpatialReference?45. // Optional. Spatial reference for all graphics in the layer. This has to match the spatial reference of the map. Default is 102100. Omit this if the map uses basemaps in web mercator.46.47. this._clusterTolerance = options.distance || 50;48. this._clusterData = options.data || [];49. this._clusters = [];50. this._clusterLabelColor = belColor || "#000";51. // labelOffset can be zero so handle it differently52. this._clusterLabelOffset = (options.hasOwnProperty("labelOffset")) ? belOffset : -5;53. // graphics that represent a single point54. this._singles = []; // populated when a graphic is clicked55. this._showSingles = options.hasOwnProperty("showSingles") ? options.showSingles : true;56. // symbol for single graphics57. var SMS = SimpleMarkerSymbol;58. this._singleSym = options.singleSymbol || new SMS("circle", 6, null, new Color(options.singleColor));59. this._singleTemplate = options.singleTemplate || new PopupTemplate({ "title": "", "description": "{*}" });60. this._maxSingles = options.maxSingles || 1000;61.62. this._webmap = options.hasOwnProperty("webmap") ? options.webmap : false;63.64. this._sr = options.spatialReference || new SpatialReference({ "wkid": 102100 });70. _setMap: function(map, surface) {71. // calculate and set the initial resolution72. this._clusterResolution = map.extent.getWidth() / map.width; // probably a bad default...73. this._clusterGraphics();74.75. // connect to onZoomEnd so data is re-clustered when zoom level changes76. this._zoomEnd = connect.connect(map, "onZoomEnd", this, function() {77. // update resolution78. this._clusterResolution = this._map.extent.getWidth() / this._map.width;79. this.clear();80. this._clusterGraphics();81. });82.83. // GraphicsLayer will add its own listener here84. var div = this.inherited(arguments);85. return div;86. },87.88. _unsetMap: function() {89. this.inherited(arguments);90. connect.disconnect(this._zoomEnd);91. },92.93. // public ClusterLayer methods94. add: function(p) {95. // Summary: The argument is a data point to be added to an existing cluster. If the data point falls within an existing cluster, it is added to that cluster and the cluster's label is updated. If the new96. //97. // if passed a graphic, use the GraphicsLayer's add method98. if ( p.declaredClass ) {99. this.inherited(arguments);100. return;101. }102.103. // add the new data to _clusterData so that it's included in clusters104. // when the map level changes105. this._clusterData.push(p);106. var clustered = false;107. // look for an existing cluster for the new point108. for ( var i = 0; i < this._clusters.length; i++ ) {109. var c = this._clusters[i];110. if ( this._clusterTest(p, c) ) {111. // add the point to an existing cluster112. this._clusterAddPoint(p, c);113. // update the cluster's geometry114. this._updateClusterGeometry(c);115. // update the label116. this._updateLabel(c);117. clustered = true;118. break;119. }120. }121.122. if ( ! clustered ) {123. this._clusterCreate(p);124. p.attributes.clusterCount = 1;125. this._showCluster(p);126. }127. },128.129. clear: function() {130. // Summary: Remove all clusters and data points.131. this.inherited(arguments);132. this._clusters.length = 0;133. },134.135. clearSingles: function(singles) {136. // Summary: Remove graphics that represent individual data points.137. var s = singles || this._singles;138. arrayUtils.forEach(s, function(g) {139. this.remove(g);140. }, this);141. this._singles.length = 0;142. },143.144. onClick: function(e) {145. // remove any previously showing single features146. this.clearSingles(this._singles);147.148. // find single graphics that make up the cluster that was clicked149. // would be nice to use filter but performance tanks with large arrays in IE150. var singles = [];151. for ( var i = 0, il = this._clusterData.length; i < il; i++) {152. if ( e.graphic.attributes.clusterId == this._clusterData[i].attributes.clusterId ) {153. singles.push(this._clusterData[i]);154. }155. }156. if ( singles.length > this._maxSingles ) {157. alert("Sorry, that cluster contains more than " + this._maxSingles + " points. Zoom in for more detail.");158. return;159. } else {160. // stop the click from bubbling to the map161. e.stopPropagation();162. this._Window.show(e.graphic.geometry);163. this._addSingles(singles);164. }169. // first time through, loop through the points170. for ( var j = 0, jl = this._clusterData.length; j < jl; j++ ) {171. // see if the current feature should be added to a cluster 172. var point = this._clusterData[j];173. var clustered = false;174. var numClusters = this._clusters.length;175. for ( var i = 0; i < this._clusters.length; i++ ) {176. var c = this._clusters[i];177. if ( this._clusterTest(point, c) ) {178. this._clusterAddPoint(point, c);179. clustered = true;180. break;181. }182. }183.184. if ( ! clustered ) {185. this._clusterCreate(point);186. }187. }188. this._showAllClusters();189. },190.191. _clusterTest: function(p, cluster) {192. var distance = (193. Math.sqrt(194. Math.pow((cluster.x - p.x), 2) + Math.pow((cluster.y - p.y), 2) 195. ) / this._clusterResolution196. );197. return (distance <= this._clusterTolerance);198. },199.200. // points passed to clusterAddPoint should be included 201. // in an existing cluster202. // also give the point an attribute called clusterId203. // that corresponds to its cluster204. _clusterAddPoint: function(p, cluster) {205. // average in the new point to the cluster geometry206. var count, x, y;207. count = cluster.attributes.clusterCount;208. x = (p.x + (cluster.x * count)) / (count + 1);209. y = (p.y + (cluster.y * count)) / (count + 1);210. cluster.x = x;211. cluster.y = y;212.213. // build an extent that includes all points in a cluster214. // extents are for debug/testing only...not used by the layer 215. if ( p.x < cluster.attributes.extent[0] ) {216. cluster.attributes.extent[0] = p.x;217. } else if ( p.x > cluster.attributes.extent[2] ) {218. cluster.attributes.extent[2] = p.x;219. }220. if ( p.y < cluster.attributes.extent[1] ) {221. cluster.attributes.extent[1] = p.y;222. } else if ( p.y > cluster.attributes.extent[3] ) {223. cluster.attributes.extent[3] = p.y;224. }225.226. // increment the count227. cluster.attributes.clusterCount++;228. // attributes might not exist229. if ( ! p.hasOwnProperty("attributes") ) {230. p.attributes = {};231. }232. // give the graphic a cluster id233. p.attributes.clusterId = cluster.attributes.clusterId;234. },235.236. // point passed to clusterCreate isn't within the237. // clustering distance specified for the layer so238. // create a new cluster for it239. _clusterCreate: function(p) {240. var clusterId = this._clusters.length + 1;241. // console.log("cluster create, id is: ", clusterId);242. // p.attributes might be undefined243. if ( ! p.attributes ) {244. p.attributes = {};245. }246. p.attributes.clusterId = clusterId;247. // create the cluster248. var cluster = {249. "x": p.x,250. "y": p.y,251. "attributes" : {252. "clusterCount": 1,253. "clusterId": clusterId,254. "extent": [ p.x, p.y, p.x, p.y ]255. }256. };257. this._clusters.push(cluster);258. },259.260. _showAllClusters: function() {261. for ( var i = 0, il = this._clusters.length; i < il; i++ ) {262. var c = this._clusters[i];263. this._showCluster(c);268. var point = new Point(c.x, c.y, this._sr);269. this.add(270. new Graphic(271. point,272. null,273. c.attributes274. )275. );276. // code below is used to not label clusters with a single point277. if ( c.attributes.clusterCount == 1 ) {278. return;279. }280.281. // show number of points in the cluster282. var font = new esri.symbol.Font()283. .setSize("10pt")284. .setWeight(esri.symbol.Font.WEIGHT_BOLD);285. var label = new TextSymbol(c.attributes.clusterCount)286. .setColor(new Color(this._clusterLabelColor))287. .setOffset(0, this._clusterLabelOffset)288. .setFont(font);289. this.add(290. new Graphic(291. point,292. label,293. c.attributes294. )295. );296. },297.298. _addSingles: function(singles) {299. // add single graphics to the map300. arrayUtils.forEach(singles, function(p) {301. var g = new Graphic(302. new Point(p.x, p.y, this._sr),303. this._singleSym,304. p.attributes,305. this._singleTemplate306. );307. this._singles.push(g);308. if ( this._showSingles ) {309. this.add(g);310. }311. }, this);312. this._Window.setFeatures(this._singles);313. },314.315. _updateClusterGeometry: function(c) {316. // find the cluster graphic317. var cg = arrayUtils.filter(this.graphics, function(g) {318. return ! g.symbol &&319. g.attributes.clusterId == c.attributes.clusterId;320. });321. if ( cg.length == 1 ) {322. cg[0].geometry.update(c.x, c.y);323. } else {324. console.log("didn't find exactly one cluster geometry to update: ", cg); 325. }326. },327.328. _updateLabel: function(c) {329. // find the existing label330. var label = arrayUtils.filter(this.graphics, function(g) {331. return g.symbol &&332. g.symbol.declaredClass == "esri.symbol.TextSymbol" && 333. g.attributes.clusterId == c.attributes.clusterId;334. });335. if ( label.length == 1 ) {336. // console.log("update label...found: ", label);337. this.remove(label[0]);338. var newLabel = new TextSymbol(c.attributes.clusterCount)339. .setColor(new Color(this._clusterLabelColor))340. .setOffset(0, this._clusterLabelOffset);341. this.add(342. new Graphic(343. new Point(c.x, c.y, this._sr),344. newLabel,345. c.attributes346. )347. );348. // console.log("updated the label");349. } else {350. console.log("didn't find exactly one label: ", label);351. }352. },353.354. // debug only...never called by the layer355. _clusterMeta: function() {356. // print total number of features357. console.log("Total: ", this._clusterData.length);358.359. // add up counts and print it360. var count = 0;361. arrayUtils.forEach(this._clusters, function(c) {362. count += c.attributes.clusterCount;367. });3、ClusterLayer的导⼊与引⽤⽂件⽬录如上图所⽰⽂件⽬录，dojo导⼊的⽅式为：[html]1. <script>2. // helpful for understanding dojoConfig.packages vs. dojoConfig.paths:3. // /blog/2013/06/20/dojo-faq-what-is-the-difference-packages-vs-paths-vs-aliases/4. var dojoConfig = {5. paths: {6. extras: location.pathname.replace(/\/[^/]+$/, "") + "/extras"7. }8. };9. </script>在代码中引⽤的代码为：[javascript]1. require([2. "extras/ClusterLayer"3. ], function(4. ClusterLayer5. ){6. });4、地图、图层的加载等完成上述操作，就能去实现聚类了，代码如下：[javascript]1. parser.parse();2.3. map = new Map("map", {logo:false,slider: true});4. var tiled = new Tiled("http://localhost:6080/arcgis/rest/services/image/MapServer");5. map.addLayer(tiled,0);6. map.centerAndZoom(new Point(103.847, 36.0473, map.spatialReference),4);7.8. map.on("load", function() {9. addClusters(county.items);10. });11.12. function addClusters(items) {13. console.log(items);14. var countyInfo = {};15. countyInfo.data = arrayUtils.map(items, function(item) {16. var latlng = new Point(parseFloat(item.x), parseFloat(item.y), map.spatialReference);17. var webMercator = webMercatorUtils.geographicToWebMercator(latlng);18. var attributes = {19. "名称": ,20. "经度": item.x,21. "纬度": item.y22. };23. return {24. "x": webMercator.x,25. "y": webMercator.y,26. "attributes": attributes27. };28. });29. console.log(countyInfo.data);30. // cluster layer that uses OpenLayers style clustering31. clusterLayer = new ClusterLayer({32. "data": countyInfo.data,33. "distance": 150,34. "id": "clusters",35. "labelColor": "#fff",36. "labelOffset": -4,37. "resolution": map.extent.getWidth() / map.width,38. "singleColor": "#f00",39. "maxSingles":300040. });41. var defaultSym = new SimpleMarkerSymbol().setSize(4);42. var renderer = new ClassBreaksRenderer(defaultSym, "clusterCount");43.44. /*var picBaseUrl = "images/";45. var blue = new PictureMarkerSymbol(picBaseUrl + "BluePin1LargeB.png", 32, 32).setOffset(0, 15);46. var green = new PictureMarkerSymbol(picBaseUrl + "GreenPin1LargeB.png", 64, 64).setOffset(0, 15);47. var red = new PictureMarkerSymbol(picBaseUrl + "RedPin1LargeB.png", 80, 80).setOffset(0, 15);*/48. var style1 = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 10,49. new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,50. new Color([255,200,0]), 1),51. new Color([255,200,0,0.8]));52. var style2 = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 25,53. new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,54. new Color([255,125,3]), 1),55. new Color([255,125,3,0.8]));56. var style3 = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 30,57. new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,58. new Color([255,23,58]), 1),59. new Color([255,23,58,0.8]));60. var style4 = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 35,65. new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,66. new Color([0,0,255]), 1),67. new Color([0,0,255,0.8]));68. renderer.addBreak(0, 2, style1);69. renderer.addBreak(2, 100, style2);70. renderer.addBreak(100, 500, style3);71. renderer.addBreak(500, 1000, style4);72. renderer.addBreak(1000, 3001, style5);73.74. clusterLayer.setRenderer(renderer);75. map.addLayer(clusterLayer);76. // close the info window when the map is clicked77. map.on("click", cleanUp);78. // close the info window when esc is pressed79. map.on("key-down", function(e) {80. if (e.keyCode === 27) {81. cleanUp();82. }83. });84. }85. function cleanUp() {86. Window.hide();87. clusterLayer.clearSingles();88. }注：在创建ClusterLayer对象时有以下⼏个参数，1、distancedistance控制的是两个点之间的距离，distance值越⼩，点密度越⼤，反之亦然；2、labelColorlabelColor为个数显⽰的颜⾊；3、labelOffsetlabelOffset默认值为0，+为向上，-为向下；4、singleColorsingleColor为单个对象出现时显⽰的颜⾊；5、maxSinglesmaxSingles是最多可显⽰多少个点。
