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数据连接与集成PB函数表达式简化几何

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。

简化几何

支持于：批处理，流处理

此表达式通过使用球形模型从给定的公差距离内移除点来简化GeoJSON几何。小于公差的循环可能会被完全移除。

表达式类别：地理空间

声明的参数

几何 - 有效的GeoJSON几何。
表达式<几何>
公差 - 公差（米）。
表达式<长整型>
非必填 坐标精度 - 坐标的小数位数最大值（默认为6位小数）。
表达式<长整型>

输出类型： 几何

示例

示例 1：基本情况

参数值：

几何: Geometry
公差: Tolerance
坐标精度: null

几何	公差	输出
{"type":"LineString","coordinates":[[30.0,0.0],[35.0,0.0],[40.0,0.0]]}	1000	{"type":"LineString","coordinates":[[30.0,0.0],[40.0,0.0]]}
{"type":"Polygon","coordinates":[[[-1.0,-1.0],[1.0,-1.0],[1.0,1.0],[0.0,1.0],[-1.0,1.0],[-1.0,-1.0]]]}	12000	{"type":"Polygon","coordinates":[[[-1.0,1.0],[1.0,1.0],[1.0,-1.0],[-1.0,-1.0],[-1.0,1.0]]]}
{"type":"MultiLineString","coordinates":[[[0.0,0.0],[5.0,0.1],[10.0,0.0]], [[0.0,-5.0],[5.0,0.1],[10.0,5.0]]]}	12000	{"type":"MultiLineString","coordinates":[[[0.0,0.0],[10.0,0.0]],[[0.0,-5.0],[10.0,5.0]]]}
{"type":"MultiPolygon","coordinates":[[[[-2.0,-2.0],[2.0,-2.0],[2.0,2.0],[0.0,2.1],[-2.0,2.0],[-2.0,...	12000	{"type":"MultiPolygon","coordinates":[[[[-2.0,2.0],[2.0,2.0],[2.0,-2.0],[-2.0,-2.0],[-2.0,2.0]], [[1...

示例 2：基本情况

参数值：

几何: Geometry
公差: Tolerance
坐标精度: Coordinate precision

几何	公差	坐标精度	输出
{"type":"Polygon","coordinates":[[[-1.012345,-1.0],[1.012345,-1.0],[1.012345,1.0],[0.0,1.0],[-1.012345,1.0],[-1.012345,-1.0]]]}	12000	3	{"type":"Polygon","coordinates":[[[-1.012,1.0],[1.012,1.0],[1.012,-1.0],[-1.012,-1.0],[-1.012,1.0]]]}
{"type":"Polygon","coordinates":[[[-1.0123456789,-1.0],[1.0123456789,-1.0],[1.0123456789,1.0],[0.0,1.0],[-1.0123456789,1.0],[-1.0123456789,-1.0]]]}	12000	6	{"type":"Polygon","coordinates":[[[-1.012346,1.0],[1.012346,1.0],[1.012346,-1.0],[-1.012346,-1.0],[-1.012346,1.0]]]}
{"type":"Polygon","coordinates":[[[-1.0123456789,-1.0],[1.0123456789,-1.0],[1.0123456789,1.0],[0.0,1.0],[-1.0123456789,1.0],[-1.0123456789,-1.0]]]}	12000	10	{"type":"Polygon","coordinates":[[[-1.0123456789,1.0],[1.0123456789,1.0],[1.0123456789,-1.0],[-1.0123456789,-1.0],[-1.0123456789,1.0]]]}

示例 3：空值情况

参数值：

几何: Geometry
公差: Tolerance
坐标精度: null

几何	公差	输出
null	0	null

示例 4：边缘情况

参数值：

几何: Geometry
公差: Tolerance
坐标精度: Coordinate precision

几何	公差	坐标精度	输出
{"type":"Polygon","coordinates":[[[-1.0,-1.0],[1.0,-1.0],[1.0,1.0],[0.0,1.0],[-1.0,1.0],[-1.0,-1.0]]]}	200000	3	null
{"type":"Polygon","coordinates":[[[-1.0,-1.0],[1.0,-1.0],[1.0,1.0],[0.0,1.0],[-1.0,1.0],[-1.0,-1.0]],[[5.0,0.0],[10.0,0.0],[10.0,5.0],[5.0,5.0],[5.0,0.0]]]}	200000	3	{"type":"Polygon","coordinates":[[[10.0, 5.0], [10.0, 0.0], [5.0, 0.0], [5.0, 5.0], [10.0, 5.0]]]}
{"type":"MultiPolygon","coordinates":[[[[-1.0,-1.0],[1.0,-1.0],[1.0,1.0],[0.0,1.0],[-1.0,1.0],[-1.0,-1.0]]],[[[5.0,0.0],[10.0,0.0],[10.0,5.0],[5.0,5.0],[5.0,0.0]]]]}	200000	3	{"coordinates":[[[10.0, 5.0], [10.0, 0.0], [5.0, 0.0], [5.0, 5.0], [10.0, 5.0]]], "type":"Polygon"}
{"type":"MultiPolygon","coordinates":[[[[-1.0,-1.0],[1.0,-1.0],[1.0,1.0],[0.0,1.0],[-1.0,1.0],[-1.0,-1.0]]],[[[5.0,0.0],[10.0,0.0],[10.0,5.0],[5.0,5.0],[5.0,0.0]]]]}	500000	3	null
{"type":"GeometryCollection","geometries":[{"type":"MultiLineString","coordinates":[[[0.0,0.0],[5.0,...	500000	3	{"type":"GeometryCollection","geometries":[{"type":"MultiLineString","coordinates":[[[0.0, 0.0], [10.0, 0.0]], [[0.0, -5.0],[10.0, 5.0]]]}]}
{"type":"GeometryCollection","geometries":[{"type":"Polygon","coordinates":[[[-1.0,-1.0],[1.0,-1.0],...	500000	3	null