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我有一个查询,在点图层周围50米的圆(缓冲区)中生成12个部分(饼状楔)。在PostgreSQL/PostGIS中生成饼状楔(几何图形)的ID
With buffer as(
SELECT gid as pt_id, (ST_DumpPoints(ST_Buffer(geom,50,3))).geom as geom
FROM my_point_table group by gid, geom
UNION ALL
SELECT gid as pt_id, geom FROM my_point_table
)
SELECT gid, (ST_Dump(ST_DelaunayTriangles(ST_Collect(geom),0, 0))).geom geom
FROM buffer
GROUP BY pt_id
我想ID指派给这些部分是这样的:如何做到这将高度赞赏
建议。
所属于[gis.se] –
感谢您指出。我可能会问那里。 –