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Geometry standardize（几何标准化(Geometry standardize)）

Supported in: Batch, Streaming

Given a valid geometry, standardizes it by enforcing the right-hand rule on the input, which is the convention for GeoJSON. This enables equality comparisons between equivalent geometries. This expression may reverse linestrings.

Expression categories: Geospatial

Declared arguments

  • Expression: Geometry to be standardized.
    Expression\

Output type: Geometry

Examples

Example 1: Base case

Argument values:

  • Expression: geometry
geometry Output
{"type":"Polygon","coordinates":[[[32.26868,-26.53253],[32.26465,-26.45873],[32.25262,-26.38563],[32.26868,-26.53253]]]} {"type":"Polygon","coordinates":[[[32.25262, -26.38563],[32.26868, -26.53253],[32.26465, -26.45873],[32.25262, -26.38563]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,0.0]]]} {"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,0.0]],[[0.25,0.25],[0.5,0.25],[0.25,0.5]]]} {"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]], [[0.25,0.25],[0.25,0.5],[0.5,0.25],[0.25,0.25]]]}
{"coordinates": [[[20.0, 10.0], [27.0, 10.0], [27.0, 17.0], [20.0, 17.0], [20.0, 10.0]]], "type": "Polygon"} {"coordinates": [[[20.0, 10.0], [27.0, 10.0], [27.0, 17.0], [20.0, 17.0], [20.0, 10.0]]], "type": "Polygon"}
{"coordinates": [[[[12.0, 12.0], [17.0, 12.0], [17.0, 17.0], [12.0, 17.0], [12.0, 12.0]]], [[[2.0, 2.0], [7.0, 2.0], [7.0, 7.0], [2.0, 7.0], [2.0, 2.0]]]], "type":"MultiPolygon"} {"coordinates": [[[[2.0, 2.0], [7.0, 2.0], [7.0, 7.0], [2.0, 7.0], [2.0, 2.0]]], [[[12.0, 12.0], [17.0, 12.0], [17.0, 17.0], [12.0, 17.0], [12.0, 12.0]]]], "type":"MultiPolygon"}
{"coordinates": [[-1.0, -1.0], [5.0, 5.0]], "type":"LineString"} {"coordinates": [[5.0, 5.0],[-1.0, -1.0]], "type":"LineString"}
{"coordinates": [[[0.0, 0.0, 0.0], [10.0, 0.0, 0.0], [10.0, 10.0, 0.0], [10.0, 10.0, 10.0], [0.0, 10.0, 10.0], [0.0, 0.0, 10.0], [0.0, 0.0, 0.0]]], "type": "Polygon"} {"coordinates": [[[0.0, 0.0, 0.0], [10.0, 0.0, 0.0], [10.0, 10.0, 0.0], [10.0, 10.0, 10.0], [0.0, 10.0, 10.0], [0.0, 0.0, 10.0], [0.0, 0.0, 0.0]]], "type": "Polygon"}

Example 2: Null case

Argument values:

  • Expression: geometry
geometry Output
null null
Not geojson null

中文翻译

几何标准化(Geometry standardize)

支持：批处理(Batch)、流处理(Streaming)

给定一个有效的几何图形，通过对其强制执行右手定则（即GeoJSON的约定）来标准化该几何图形。这使得等效几何图形之间可以进行相等性比较。此表达式可能会反转线串(linestring)的方向。

表达式类别： 地理空间(Geospatial)

声明的参数

  • 表达式(Expression)： 需要标准化的几何图形。
    Expression\

输出类型： Geometry

示例

示例1：基本情况

参数值：

  • 表达式(Expression)： geometry
geometry 输出(Output)
{"type":"Polygon","coordinates":[[[32.26868,-26.53253],[32.26465,-26.45873],[32.25262,-26.38563],[32.26868,-26.53253]]]} {"type":"Polygon","coordinates":[[[32.25262, -26.38563],[32.26868, -26.53253],[32.26465, -26.45873],[32.25262, -26.38563]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,0.0]]]} {"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]]]}
{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,1.0],[1.0,0.0]],[[0.25,0.25],[0.5,0.25],[0.25,0.5]]]} {"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]], [[0.25,0.25],[0.25,0.5],[0.5,0.25],[0.25,0.25]]]}
{"coordinates": [[[20.0, 10.0], [27.0, 10.0], [27.0, 17.0], [20.0, 17.0], [20.0, 10.0]]], "type": "Polygon"} {"coordinates": [[[20.0, 10.0], [27.0, 10.0], [27.0, 17.0], [20.0, 17.0], [20.0, 10.0]]], "type": "Polygon"}
{"coordinates": [[[[12.0, 12.0], [17.0, 12.0], [17.0, 17.0], [12.0, 17.0], [12.0, 12.0]]], [[[2.0, 2.0], [7.0, 2.0], [7.0, 7.0], [2.0, 7.0], [2.0, 2.0]]]], "type":"MultiPolygon"} {"coordinates": [[[[2.0, 2.0], [7.0, 2.0], [7.0, 7.0], [2.0, 7.0], [2.0, 2.0]]], [[[12.0, 12.0], [17.0, 12.0], [17.0, 17.0], [12.0, 17.0], [12.0, 12.0]]]], "type":"MultiPolygon"}
{"coordinates": [[-1.0, -1.0], [5.0, 5.0]], "type":"LineString"} {"coordinates": [[5.0, 5.0],[-1.0, -1.0]], "type":"LineString"}
{"coordinates": [[[0.0, 0.0, 0.0], [10.0, 0.0, 0.0], [10.0, 10.0, 0.0], [10.0, 10.0, 10.0], [0.0, 10.0, 10.0], [0.0, 0.0, 10.0], [0.0, 0.0, 0.0]]], "type": "Polygon"} {"coordinates": [[[0.0, 0.0, 0.0], [10.0, 0.0, 0.0], [10.0, 10.0, 0.0], [10.0, 10.0, 10.0], [0.0, 10.0, 10.0], [0.0, 0.0, 10.0], [0.0, 0.0, 0.0]]], "type": "Polygon"}

示例2：空值情况

参数值：

  • 表达式(Expression)： geometry
geometry 输出(Output)
null null
非GeoJSON格式 null