Python ArcGIS dissolve_boundaries用法及代码示例

本文简要介绍 python 语言中 arcgis.geoanalytics.manage_data.dissolve_boundaries 的用法。

用法:

arcgis.geoanalytics.manage_data.dissolve_boundaries(input_layer, dissolve_fields=None, summary_fields=None, multipart=False, output_name=None, gis=None, context=None, future=False)

返回：

FeatureLayerCollection 。

dissolve_boundaries 任务查找相交或具有相同字段值的多边形，并将它们合并在一起以形成单个多边形。

例子：

A city council wants to control liquor sales by refusing new licenses to stores within 1,000 feet of schools, libraries, and parks. After creating a 1,000-foot buffer around the schools, libraries, and parks, the buffered layers can be joined together and the boundaries can be dissolved to create a single layer of restricted areas.

注意：

仅在 ArcGIS Enterprise 10.7 及更高版本中可用。

Parameter	Description
input_layer	必需的层。包含将被融合的面要素的图层。请参阅特征输入。
dissolve_fields	可选字符串。您想要溶解的每个字段的逗号分隔字符串列表。input_layer 中的一个或多个字段确定如何根据字段值合并多边形。 如果不指定字段，相交的多边形默认会分解为一个多边形。 如果指定字段，则每个指定字段共享相同值的多边形将被分解为一个多边形。
summary_fields	可选的字典列表。您要计算的字段名称和统计汇总类型的列表。请注意，始终返回计数。默认情况下，返回所有统计信息。 用法:[{"statisticType" : "<stat>", "onStatisticField" : "<field name>"}] onStatisticField is the name of the field in the input point layer to calculate the statistic. statisticType is one of the following for numeric fields: Count - Totals the number of values of all the points in each polygon. Sum - Adds the total value of all the points in each polygon. Mean - Calculates the average of all the points in each polygon. Min - Finds the smallest value of all the points in each polygon. Max - Finds the largest value of all the points in each polygon. Range - Finds the difference between the Min and Max values. Stddev - Finds the standard deviation of all the points in each polygon. Var - Finds the variance of all the points in each polygon. statisticType is one of the following for string fields: Count - Totals the number of strings for all the points in each polygon. Any - Returns a sample string of a point in each polygon. # Example >>> summary_fields = [{"statisticType" : "Sum", "onStatisticField" : "quadrat_area_km2"}, {"statisticType" : "Mean", "onStatisticField" : "soil_depth_cm"}, {"statisticType" : "Any", "onStatisticField" : "quadrat_desc"}]
multipart	可选布尔值。如果是 True ，则输出服务可以包含多部分函数。如果 False ，输出服务将仅包含 single-part 特征，并且将为每个部分创建单独的特征。 默认值为 False 。
output_name	可选字符串。该任务将创建结果的要素服务。您定义服务的名称。
gis	可选 GIS ，将对其进行分析。
context	可选字典。 context 参数包含影响任务执行的其他设置。对于此任务，有五个设置： extent - A bounding box that defines the analysis area. Only those features that intersect the bounding box will be analyzed. processSR - The features will be projected into this coordinate system for analysis. outSR - The features will be projected into this coordinate system after the analysis to be saved. The output spatial reference for the spatiotemporal big data store is always WGS84. dataStore - Results will be saved to the specified data store. For ArcGIS Enterprise, the default is the spatiotemporal big data store. defaultAggregationStyles - If set to true, results will have square, hexagon, and triangle aggregation styles enabled on results map services.
future	可选布尔值。如果是 True ，将返回一个 future 对象，并且进程不会等待任务完成。默认为 False ，表示等待结果。

例子：

# Usage Example: This example dissolves boundaries of soil areas in Nebraska if they have
# the same solubility. For dissolved features, it calculates the sum of the quadrat area,
# the mean soil depth, and an example of the quadrat description.

arcgis.env.out_spatial_reference = 3310
arcgis.env.output_datastore= "relational"
arcgis.env.defaultAggregations= True

summary_fields = [{"statisticType" : "Sum", "onStatisticField" : "quadrat_area_km2"},
                {"statisticType" : "Mean", "onStatisticField" : "soil_depth_cm"},
                {"statisticType" : "Any", "onStatisticField" : "quadrat_desc"}]

dissolve_result = dissolve_boundaries(input_layer=study_area_lyr,
                                        dissolve_fields="soil_suitability",
                                        summary_fields=summary_fields,
                                        multipart=True,
                                        output_name="Soil_Suitability_dissolved")