mirror of
https://git.osgeo.org/gitea/postgis/postgis
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66 lines
3.8 KiB
SQL
66 lines
3.8 KiB
SQL
-- Split line by point of different SRID
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select st_split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=5;POINT(5 1)');
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-- Split line by point on the line interior
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select '1',st_asewkt(st_split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;POINT(5 0)'));
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select '1.1',st_asewkt(st_split('SRID=10;LINESTRING(10 0, 0 0)', 'SRID=10;POINT(5 0)'));
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-- Split line by point on the line boundary
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select '2',st_asewkt(st_split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;POINT(10 0)'));
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-- Split line by point on the line exterior
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select '3',st_asewkt(st_split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;POINT(5 1)'));
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-- Split line by line of different SRID
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select st_split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=5;LINESTRING(5 1, 10 1)');
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-- Split line by disjoint line
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select '4', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;LINESTRING(20 0, 20 20)'));
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-- Split line by touching line
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select '5', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;LINESTRING(10 -5, 10 5)'));
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-- Split line by crossing line
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select '6', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;LINESTRING(5 -5, 5 5)'));
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-- Split line by multiply-crossing line
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select '7', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0, 10 10, 0 10, 0 20, 10 20)', 'SRID=10;LINESTRING(5 -5, 5 25)'));
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-- Split line by overlapping line (1)
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select '8.1', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;LINESTRING(5 0, 20 0)'));
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-- Split line by contained line (2)
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select '8.2', st_asewkt(ST_Split('SRID=10;LINESTRING(0 0, 10 0)', 'SRID=10;LINESTRING(5 0, 8 0)'));
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-- Split exterior-only polygon by crossing line
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select '20', st_asewkt(ST_Split('SRID=12;POLYGON((0 0, 10 0, 10 10, 0 10, 0 0))', 'SRID=12;LINESTRING(5 -5, 5 15)'));
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-- Split single-hole polygon by line crossing both exterior and hole
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select '21', st_asewkt(ST_Split('SRID=12;POLYGON((0 0, 10 0, 10 10, 0 10, 0 0),(2 2, 8 2, 8 8, 2 8, 2 2))', 'SRID=12;LINESTRING(5 -5, 5 15)'));
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-- Split single-hole polygon by line crossing only exterior
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select '22', st_asewkt(ST_Split('SRID=12;POLYGON((0 0, 10 0, 10 10, 0 10, 0 0),(5 2, 8 2, 8 8, 5 8, 5 2))', 'SRID=12;LINESTRING(2 -5, 2 15)'));
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-- Split double-hole polygon by line crossing exterior and both holes
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select '23', st_asewkt(ST_Split('SRID=12;POLYGON((0 0, 10 0, 10 10, 0 10, 0 0),(2 2, 8 2, 8 4, 2 4, 2 2),(2 6,8 6,8 8,2 8,2 6))', 'SRID=12;LINESTRING(5 -5, 5 15)'));
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-- Split multiline by line crossing both
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select '30', st_asewkt(st_split('SRID=10;MULTILINESTRING((0 0, 10 0),(0 5, 10 5))', 'SRID=10;LINESTRING(5 -5, 5 10)'));
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-- Split multiline by line crossing only one of them
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select '31', st_asewkt(st_split('SRID=10;MULTILINESTRING((0 0, 10 0),(0 5, 10 5))', 'SRID=10;LINESTRING(5 -5, 5 2)'));
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-- Split multiline by disjoint line
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select '32', st_asewkt(st_split('SRID=10;MULTILINESTRING((0 0, 10 0),(0 5, 10 5))', 'SRID=10;LINESTRING(5 10, 5 20)'));
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-- Split multiline by point on one of them
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select '40', st_asewkt(st_split('SRID=10;MULTILINESTRING((0 0, 10 0),(0 5, 10 5))', 'SRID=10;POINT(5 0)'));
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-- Split multipolygon by line
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select '50', st_asewkt(ST_Split('SRID=12;MULTIPOLYGON(((0 0, 10 0, 10 10, 0 10, 0 0),(2 2, 8 2, 8 4, 2 4, 2 2),(2 6,8 6,8 8,2 8,2 6)),((20 0,20 10, 30 10, 30 0, 20 0),(25 5, 28 5, 25 8, 25 5)))', 'SRID=12;LINESTRING(5 -5, 5 15)'));
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-- Split geometrycollection by line
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select '60', st_asewkt(ST_Split('SRID=12;GEOMETRYCOLLECTION(MULTIPOLYGON(((0 0, 10 0, 10 10, 0 10, 0 0),(2 2, 8 2, 8 4, 2 4, 2 2),(2 6,8 6,8 8,2 8,2 6)),((20 0,20 10, 30 10, 30 0, 20 0),(25 5, 28 5, 25 8, 25 5))),MULTILINESTRING((0 0, 10 0),(0 5, 10 5)))', 'SRID=12;LINESTRING(5 -5, 5 15)'));
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-- Split 3d line by 2d line
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select '70', st_asewkt(ST_Split('SRID=11;LINESTRING(1691983.26 4874594.81 312.24, 1691984.86 4874593.69 312.24, 1691979.54 4874586.09 312.24, 1691978.03 4874587.16 298.36)', 'SRID=11;LINESTRING(1691978.0 4874589.0,1691982.0 4874588.53, 1691982.0 4874591.0)'));
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