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API 参考 ↗
数据连接与集成PB函数表达式几何对称差

注意：以下翻译的准确性尚未经过验证。这是使用 AIP ↗ 从原始英文文本进行的机器翻译。

几何对称差

支持于: 批处理, 流处理

计算在任一几何中但不在其交集中部分。

表达式类别: 地理空间

声明的参数

  • 几何 a - 几何 b。
    Expression<Geometry>
  • 几何 b - 几何 a。
    Expression<Geometry>

输出类型: Geometry

示例

示例 1: 基本情况

参数值:

  • 几何 a: geometry_a
  • 几何 b: geometry_b
geometry_ageometry_b输出
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[2.0,1.0],[2.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[1.0,0.0],[1.0,1.0],[3.0,1.0],[3.0,0.0],[1.0,0.0]]]}{"type":"MultiPolygon","coordinates":[[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]],[[[2.0,0.0],[2.0,1.0],[3.0,1.0],[3.0,0.0],[2.0,0.0]]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[0.0,0.0],[0.5,0.0],[0.5,1.0],[0.0,1.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[0.5,1.0],[1.0,1.0],[1.0,0.0],[0.5,0.0],[0.5,1.0]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[0.25,0.25],[0.5,0.25],[0.5,0.5],[0.25,0.5],[0.25,0.25]]]}{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]],[[0.25,0.25],[0.5,0.25],[0.5,0.5],[0.25,0.5],[0.25,0.25]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[5.0,5.0],[5.0,6.0],[6.0,6.0],[6.0,5.0],[5.0,5.0]]]}{"type":"MultiPolygon","coordinates":[[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]],[[[5.0,5.0],[5.0,6.0],[6.0,6.0],[6.0,5.0],[5.0,5.0]]]]}

示例 2: 空值情况

参数值:

  • 几何 a: geometry_a
  • 几何 b: geometry_b
geometry_ageometry_b输出
null{"type":"LineString","coordinates":[]}null
{"type":"LineString","coordinates":[]}nullnull
nullnullnull

示例 3: 边缘情况

参数值:

  • 几何 a: geometry_a
  • 几何 b: geometry_b
geometry_ageometry_b输出
{"type":"Point","coordinates":[0.0,0.0]}{"type":"Point","coordinates":[0.0,0.0]}{"type":"Point","coordinates":[]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[]]}
{"type":"Point","coordinates":[0.0,0.0]}{"type":"LineString","coordinates":[[0.0,0.0],[0.0,1.0]]}{"type":"LineString","coordinates":[[0.0,0.0],[0.0,1.0]]}
{"type":"LineString","coordinates":[[0.0,0.0],[0.0,1.0]]}{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]]}
{"type":"Point","coordinates":[0.0,0.0]}{"type":"Point","coordinates":[0.0,0.0]}{"type":"Point","coordinates":[]}