Get geometry envelope（获取几何包络线）

Supported in: Batch, Streaming

Given a valid geometry or array of geometries, return a geometry representing the envelope of the input. The envelope is the smallest axis-aligned rectangular region containing the minimum and maximum x and y values of the geometry.

Expression categories: Geospatial

Declared arguments

• Expression: GeoJSON string or array of GeoJSON strings.
  Expression\ | Geometry>

Output type: Geometry

Examples

Example 1: Base case

Argument values:

• Expression: geometry

geometry	Output
{"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[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]]]}

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Example 2: Base case

Argument values:

• Expression: geometryArray

geometryArray	Output
[ {"type":"LineString","coordinates":[[1,0],[0,8.4]]}, {"type":"Point","coordinates":[125.6, -92.3]}, {"type":"Polygon","coordinates":[[[0,0],[1,6.3],[-6,1],[0,0]]]} ]	{"type":"Polygon","coordinates":[[[-6.0,-92.3],[-6.0,8.4],[125.6,8.4],[125.6,-92.3],[-6.0,-92.3]]]}

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Example 3: Null case

Argument values:

• Expression: geometryArray

geometryArray	Output
null	null

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Example 4: Edge case

Argument values:

• Expression: geometryArray

geometryArray	Output
[ Invalid GeoJSON, {"type":"LineString","coordinates":[[2,0],[0,4.8]]} ]	{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,4.8],[2.0,4.8],[2.0,0.0],[0.0,0.0]]]}

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中文翻译

获取几何包络线

支持：批处理(Batch)、流处理(Streaming)

给定一个有效的几何体(Geometry)或几何体数组，返回表示输入几何体包络线的几何体。包络线是包含几何体最小和最大x、y值的最小轴对齐矩形区域。

表达式类别： 地理空间(Geospatial)

声明的参数

• 表达式(Expression)： GeoJSON字符串或GeoJSON字符串数组。
  表达式\<数组\<几何体> | 几何体>

输出类型： 几何体(Geometry)

示例

示例1：基础情况

参数值：

• 表达式： geometry

geometry	输出
{"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[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]]]}

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示例2：基础情况

参数值：

• 表达式： geometryArray

geometryArray	输出
[ {"type":"LineString","coordinates":[[1,0],[0,8.4]]}, {"type":"Point","coordinates":[125.6, -92.3]}, {"type":"Polygon","coordinates":[[[0,0],[1,6.3],[-6,1],[0,0]]]} ]	{"type":"Polygon","coordinates":[[[-6.0,-92.3],[-6.0,8.4],[125.6,8.4],[125.6,-92.3],[-6.0,-92.3]]]}

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示例3：空值情况

参数值：

• 表达式： geometryArray

geometryArray	输出
null	null

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示例4：边界情况

参数值：

• 表达式： geometryArray

geometryArray	输出
[ 无效的GeoJSON(Invalid GeoJSON), {"type":"LineString","coordinates":[[2,0],[0,4.8]]} ]	{"type":"Polygon","coordinates":[[[0.0,0.0],[0.0,4.8],[2.0,4.8],[2.0,0.0],[0.0,0.0]]]}

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