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Geometry difference（几何差异（Geometry difference））

Supported in: Batch, Faster, Streaming

Calculates the portion of geometry a that is not intersecting geometry b.

Expression categories: Geospatial

Declared arguments

  • Geometry a: Geometry a.
    Expression\
  • Geometry b: Geometry b.
    Expression\

Output type: Geometry

Examples

Example 1: Base case

Argument values:

  • Geometry a: geometry_a
  • Geometry b: geometry_b
geometry_a geometry_b Output
{"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":[[[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":[[[5.0,5.0],[5.0,6.0],[6.0,6.0],[6.0,5.0],[5.0,5.0]]]} {"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":"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]]]}

Example 2: Edge case

Argument values:

  • Geometry a: geometry_a
  • Geometry b: geometry_b
geometry_a geometry_b Output
{"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":"Point","coordinates":[]}
{"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":"LineString","coordinates":[]}

中文翻译

几何差异（Geometry difference）

支持：批处理（Batch）、快速处理（Faster）、流处理（Streaming）

计算几何体 a 中不与几何体 b 相交的部分。

表达式类别： 地理空间（Geospatial）

声明的参数

  • 几何体 a（Geometry a）： 几何体 a。
    表达式\
  • 几何体 b（Geometry b）： 几何体 b。
    表达式\

输出类型： Geometry

示例

示例 1：基本情形

参数值：

  • 几何体 a： geometry_a
  • 几何体 b： geometry_b
geometry_a geometry_b 输出
{"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":[[[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":[[[5.0,5.0],[5.0,6.0],[6.0,6.0],[6.0,5.0],[5.0,5.0]]]} {"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":"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]]]}

示例 2：边界情形

参数值：

  • 几何体 a： geometry_a
  • 几何体 b： geometry_b
geometry_a geometry_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":"Point","coordinates":[]}
{"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":"LineString","coordinates":[]}