PostGIS之路——幾何對象編輯（二）

1、ST_Reverse       返回幾何對象頂點順序相反的幾何對象。 geometry ST_Reverse(geometry g1); 示例SQL： SELECT ST_AsText(the_geom) as line, ST_AsText(ST_Reverse(the_geom)) As reverseline FROM (SELECT ST_MakeLine(ST_MakePoint(

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