AsShape (arcpy)
摘要
将 Esri JSON 或 GeoJSON 转换为 ArcPy 几何对象。GeoJSON 是地理空间数据交换格式,可用于对地理数据结构进行编码。
语法
AsShape (geojson_struct, {esri_json})
参数 | 说明 | 数据类型 |
geojson_struct |
The geojson_struct includes type and coordinates. The following strings are included for type: Point, LineString, Polygon, MultiPoint, and MultiLineString. | Dictionary |
esri_json | The esri_json geometry properties and spatial reference. The properties for geometry include points, paths, rings. The Following geometry types are supported: Point, Polyline, Polygon, multipart features and Feature Set, and Record Set. (默认值为 False) | Boolean |
数据类型 | 说明 |
Geometry |
AsShape 返回基于输入 GeoJSON 对象的几何对象(PointGeometry、Multipoint、Polyline 或 Polygon) 或 esriJSON 对象。
|
代码实例
使用 GeoJSON 对象创建 PointGeometry 对象。
import arcpy
gjPoint = {"type": "Point", "coordinates": [5.0, 5.0]}
ptGeometry = arcpy.AsShape(gjPoint)
使用 Esri JSON 对象创建 PointGeometry 对象。
import arcpy
esri_json = {"x": -122.65, "y": 45.53, "spatialReference": {"wkid": 4326}}
# Set the second parameter to True to use an esri JSON
ptGeometry = arcpy.AsShape(esri_json, True)
使用 GeoJSON 对象创建 Multipoint 对象。
import arcpy
gjMultiPoint = {
"type": "MultiPoint",
"coordinates": [[5.0, 4.0], [8.0, 7.0]]}
multiPoint = arcpy.AsShape(gjMultiPoint)
使用 Esri JSON 对象创建 Multipoint 对象。
import arcpy
esri_json = {
"points" : [
[-97.06138, 32.837],
[-97.06133, 32.836],
[-97.06124, 32.834],
[-97.06127, 32.832]],
"spatialReference" : {"wkid" : 4326}}
# Set the second parameter to True to use an esri JSON
multiPoint = arcpy.AsShape(esri_json, True)
使用 GeoJSON 对象创建 Polyline 对象。
import arcpy
gjLineString = {
"type": "LineString",
"coordinates": [[5.0, 4.0], [8.0, 7.0]]}
polyLine = arcpy.AsShape(gjLineString)
使用 Esri JSON 对象创建 Polyline 对象。
import arcpy
esri_json = {
"paths" : [
[[-97.08, 32.8], [-97.05, 32.6], [-97.06, 32.7], [-97.07, 32.6]],
[[-97.4, 32.5], [-97.2, 32.75]]],
"spatialReference" : {"wkid" : 4326}}
# Set the second parameter to True to use an esri JSON
polyLine = arcpy.AsShape(esri_json, True)
使用 GeoJSON 对象创建多部分 Polyline 对象。
import arcpy
gjMultiLineString = {
"type": "MultiLineString",
"coordinates": [
[[5.0, 4.0], [8.0, 7.0]],
[[4.0, 5.0], [7.0, 8.0]]]}
mpPolyLine = arcpy.AsShape(gjMultiLineString)
使用 GeoJSON 对象创建 Polygon 对象。
import arcpy
gjPolygon = {
"type": "Polygon",
"coordinates": [
[[10.0, 0.0], [20.0, 0.0], [20.0, 10.0], [10.0, 10.0], [10.0, 0.0]]]}
polygon = arcpy.AsShape(gjPolygon)
使用 GeoJSON 对象创建包含孔对象的 Polygon 对象。
import arcpy
gjPolygonWithHole = {
"type": "Polygon",
"coordinates": [
[[10.0, 0.0], [20.0, 0.0], [20.0, 10.0], [10.0, 10.0], [10.0, 0.0]],
[[12.0, 2.0], [18.0, 2.0], [18.0, 8.0], [12.0, 8.0], [12.0, 2.0]]]}
polygonWithHole = arcpy.AsShape(gjPolygonWithHole)
相关主题
9/15/2013