Parse well known text as geometry（将 Well-Known Text 解析为几何图形）

Supported in: Batch, Faster, Streaming

Converts well-known text (WKT) string to geometry logical type. Invalid WKT input will be returned as null. Optionally supply a source coordinate system identifier to convert from the source coordinate system to WGS 84 if the WKT is not in WGS 84 already.

Expression categories: Geospatial

Declared arguments

• Expression: Valid well-known text as a string.
  Expression\
• optional Source coordinate system: Optional coordinate system identifier if the well-known text is not WGS 84. Formatted as "authority:id". For example, UTM zone 18N could be identified by EPSG:32618.
  Literal\

Output type: Geometry

Examples

Example 1: Base case

Argument values:

• Expression: wkt
• Source coordinate system: null

wkt	Output
POINT (3.0 5.0 2.0)	{"type":"Point","coordinates":[3.0, 5.0, 2.0]}
POLYGON ((0.0 0.0, 1.0 0.0, 0.0 1.0, 0.0 0.0))	{"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]]]}
LINESTRING (0.0 0.0, 1.0 0.0)	{"type":"LineString","coordinates":[[0.0,0.0],[1.0,0.0]]}

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Example 2: Base case

Argument values:

• Expression: wkt
• Source coordinate system: EPSG:32618

wkt	Output
POINT (320000.0 4300000.0 2.0)	{"type":"Point","coordinates":[-77.07368071728229,38.83040844313318, 2.0]}
POLYGON ((320000.0 4300000.0, 320100.0 4300000.0, 320000.0 4300100.0, 320000.0 4300000.0))	{"type":"Polygon","coordinates":[[[-77.07368071728229,38.83040844313318],[-77.0725293738795,38.83042888342659],[-77.07370685720375,38.83130901341597],[-77.07368071728229,38.83040844313318]]]}
LINESTRING (320000.0 4300000.0, 320100.0 4300000.0)	{"type":"LineString","coordinates":[[-77.07368071728229,38.83040844313318],[-77.0725293738795,38.83042888342659]]}

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中文翻译

将 Well-Known Text 解析为几何图形

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

将 Well-Known Text (WKT) 字符串转换为几何逻辑类型。无效的 WKT 输入将返回 null。如果 WKT 并非 WGS 84 格式，可选择提供源坐标系标识符，将其从源坐标系转换为 WGS 84。

表达式类别： 地理空间(Geospatial)

声明的参数

• 表达式： 有效的 Well-Known Text 字符串。
  Expression\
• 可选 源坐标系： 如果 Well-Known Text 不是 WGS 84 格式，可选的坐标系标识符。格式为 "authority:id"。例如，UTM 18N 区可由 EPSG:32618 标识。
  Literal\

输出类型： Geometry

示例

示例 1：基本情况

参数值：

• 表达式： wkt
• 源坐标系： null

wkt	输出
POINT (3.0 5.0 2.0)	{"type":"Point","coordinates":[3.0, 5.0, 2.0]}
POLYGON ((0.0 0.0, 1.0 0.0, 0.0 1.0, 0.0 0.0))	{"type":"Polygon","coordinates":[[[0.0,0.0],[1.0,0.0],[0.0,1.0],[0.0,0.0]]]}
LINESTRING (0.0 0.0, 1.0 0.0)	{"type":"LineString","coordinates":[[0.0,0.0],[1.0,0.0]]}

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示例 2：基本情况

参数值：

• 表达式： wkt
• 源坐标系： EPSG:32618

wkt	输出
POINT (320000.0 4300000.0 2.0)	{"type":"Point","coordinates":[-77.07368071728229,38.83040844313318, 2.0]}
POLYGON ((320000.0 4300000.0, 320100.0 4300000.0, 320000.0 4300100.0, 320000.0 4300000.0))	{"type":"Polygon","coordinates":[[[-77.07368071728229,38.83040844313318],[-77.0725293738795,38.83042888342659],[-77.07370685720375,38.83130901341597],[-77.07368071728229,38.83040844313318]]]}
LINESTRING (320000.0 4300000.0, 320100.0 4300000.0)	{"type":"LineString","coordinates":[[-77.07368071728229,38.83040844313318],[-77.0725293738795,38.83042888342659]]}