【305】◀▶ ArcPy 相关功能实现

1. 同一图层的多个要素合并（2种方法）
2. 导入带经纬度坐标的 txt 文件
3. 栅格计算器的实现
4. 添加 shp 文件（显示在 ArcMap）
5. 通过经纬度坐标生成 Polygon
6. 多边形重叠区域次数计算（赤潮发生频次）
7. 批量删除/添加 shp 文件字段
8. 批量修改文件的 Spatial Reference
9. 读取折线或面几何（点坐标）
10. 读取 Geometry（2种方法）
11. 批量修改图例显示内容
12. 批量引用图层样式（Symbology）
13. 批量修改栅格图层 Background Vlue 值
工具目录：
Dissolve_management 工具
 Geometry.union 方法
 MakeXYEventLayer_management 工具
 RasterCalculator 工具
Polygon 对象
 Point 对象
 Union_analysis 工具
 MultipartToSinglepart_management 工具
 DeleteField_management 工具
 AddField_management 工具
 Project_management 工具
 SpatialReference 对象
 Describe 对象
 ApplySymbologyFromLayer_management 工具
黑色窗体参考代码：
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<p class="Syntax_IDL"><a class="selected_IDL" href="http://desktop.arcgis.com/zh-cn/arcmap/10.3/tools/data-management-toolbox/dissolve.htm" target="_blank"><span style="font-size: 15px; font-family: Georgia;"><strong>Dissolve (Data Management)</strong></span></a></p>
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<td style="border-style: solid; text-align: center; border-color: #ffffff; width: 50px; border-width: 3px; background-color: #333333;"><span style="font-family: Georgia; color: #ff9900;"><strong><span style="font-size: 16px;">01<br /></span></strong></span></td>
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<p><span style="font-size: 13px; font-family: Georgia;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====<span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&lt;&lt;&lt;&lt;</span></span></span></span></span></span></span></span></span></strong></span></span> </span></span></span></span></span></span></span></span></span>Description <span style="font-size: 13px;"><span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&gt;&gt;&gt;&gt;</span></span></span></span></span></span></span></span></span></strong></span></span></strong></span></span></span><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====</span></span></span></span></span></span></span></span></span></strong></span></span><br /></span></span></p>
<p><span style="font-family: Georgia; font-size: 13px;"><span style="color: #99ccff;">基于指定属性聚合要素。<br /><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">----------------------------------------------------------------------------------<br /></span></span></span></span></span></span></span></p>
<p><span style="font-family: Georgia; font-size: 13px;"><span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====<span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&lt;&lt;&lt;&lt;</span></span></span></span></span></span></span></span></span></strong></span></span></span></span></span></span></span></span></span></span></span> Syntax <span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&gt;&gt;&gt;&gt;</span></span></span></span></span></span></span></span></span></strong></span></span><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====</span></span></span></span></span></span></span></span></span><br /></strong></span></span></span></p>
<p><span style="font-family: Georgia; font-size: 13px;"><span style="color: #99ffcc; background-color: #333333;"><strong><span style="color: #ff99cc;"><strong style="font-size: 14.4px !important; line-height: 19.6px !important;">Dissolve_management&nbsp;</strong></span></strong>(in_features, out_feature_class, {dissolve_field}, {statistics_fields}, {multi_part}, {unsplit_lines})<br /><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">----------------------------------------------------------------------------------</span></span></span></span></span><br /></span></span></p>
<p><span style="font-size: 13px; font-family: Georgia;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====<span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&lt;&lt;&lt;&lt;</span></span></span></span></span></span></span></span></span></strong> Parameter <span style="font-size: 13px;"><span style="color: #cc99ff;"><strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">&gt;&gt;&gt;&gt;</span></span></span></span></span></span></span></span></span></strong><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px;"><span style="color: #99ccff;"><span style="font-size: 13px; color: #99ccff;"><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span class="IDLkeyword hint--top hint--rounded hint--bounce" data-hint="Executes one or more statements repeatedly, incrementing or decrementing a variable with each repetition, until a condition is met."><span style="color: #99ccff;"><span style="color: #ffcc00;">====</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></strong></span></span></span></span></span></p>
<p><span style="font-family: Georgia;"><span style="font-size: 13px;"><span style="color: #99ccff;">◈&nbsp; <span style="color: #99ccff;"><span style="font-size: 13px; color: #ffcc99;"><span style="font-size: 13px;">in_features</span></span>：要聚合的要素。<br /></span></span></span><span style="font-size: 13px;"><span style="font-family: Georgia;"><span style="font-size: 13px;"><span style="color: #99ccff;">◈&nbsp; <span style="color: #99ccff;"><span style="font-size: 13px; color: #ffcc99;"><span style="font-size: 13px;">out_feature_class<span style="color: #99ccff;">：要创建的将包含聚合要素的要素类。</span></span></span></span></span></span></span><br /><span style="font-family: Georgia;"><span style="font-size: 13px;"><span style="color: #99ccff;">◈&nbsp; <span style="color: #99ccff;"><span style="font-size: 13px; color: #ffcc99;"><span style="font-size: 13px;">dissolve_field<span style="color: #99ccff;">：要聚合要素的一个或多个字段。省略的话则对所有要素合并。</span></span></span></span></span></span></span></span></span></p>
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