text NDR_or_XDR); bytea ST_AsBinary(geography g1); bytea ST_AsBinary(geography g1, text NDR_or_XDR); //示例 SELECT ST_AsBinary(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326)); st_asbinary --- \001\003\000\000\000\001\000\000\000\005 \000\000\000\000\...
编写SQL语句:利用PostGIS提供的函数(如ST_AsMVT)生成MVT格式的矢量切片。 sql SELECT ST_AsMVT(mvt_geom, 'layer_name', 4096, 'geom', 'id') FROM ( SELECT ST_AsMVTGeom(geom, ST_TileEnvelope(zoom_level, tile_x, tile_y), 4096, 64) AS geom, id, -- 其他属性字段 FROM your_table WHERE geo...
SELECT ST_AsMVT(mvtgeom.*) FROM mvtgeom;
SELECT ST_AsMVT(mvtgeom.*) FROM mvtgeom;
Hi, Sometimes pg_tileserv returns error like ERROR: lwcollection_construct: mixed dimension geometries: 2/0 SQL state: XX000 I found the crashed query with pg_stat_activity: SELECT ST_AsMVT(mvtgeom, 'reitti.tieosoiteverkko', 4096, 'geome...
The ST_AsMVT() function uses the function name ("public.countries_name") as the MVT layer name. This is not required, but for clients that self-configure, it allows them to use the function name as the layer source name. In the filter portion of the query (in the WHERE clause) the...
See https://trac.osgeo.org/postgis/ticket/4690 tmplSQL := ` SELECT ST_AsMVT(mvtgeom, {{ .MvtParams }}) FROM ( SELECT ST_AsMVTGeom( ST_Transform(ST_Force2D(t."{{ .GeometryColumn }}"), {{ .TileSrid }}), bounds.geom_clip, {{ .Resolution }}, {{ .Buffer }} ) AS "{{ ....