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git-svn-id: http://svn.osgeo.org/postgis/trunk@14869 b70326c6-7e19-0410-871a-916f4a2858ee
38 lines
1.1 KiB
SQL
38 lines
1.1 KiB
SQL
-- tests for Hausdorff distances
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-- polygon and polygon
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SELECT 'hausdorff_poly_poly', st_hausdorffdistance(
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'POLYGON((0 0, 0 2, 1 2, 2 2, 2 0, 0 0))'::geometry,
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'POLYGON((0.5 0.5, 0.5 2.5, 1.5 2.5, 2.5 2.5, 2.5 0.5, 0.5 0.5))'::geometry);
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-- 0.707106781186548
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-- linestring and linestring
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SELECT 'hausdorff_ls_ls', st_hausdorffdistance(
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'LINESTRING (0 0, 2 1)'::geometry
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, 'LINESTRING (0 0, 2 0)'::geometry);
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-- 1.0
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-- other linestrings
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SELECT 'hausdorff_ls_ls_2', st_hausdorffdistance(
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'LINESTRING (0 0, 2 0)'::geometry,
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'LINESTRING (0 1, 1 2, 2 1)'::geometry);
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-- 2.0
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-- linestring and multipoint
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SELECT 'hausdorff_ls_mp', st_hausdorffdistance(
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'LINESTRING (0 0, 2 0)'::geometry,
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'MULTIPOINT (0 1, 1 0, 2 1)'::geometry);
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-- 1.0
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-- another linestring and linestring
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SELECT 'hausdorff_ls_ls_3', st_hausdorffdistance(
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'LINESTRING (130 0, 0 0, 0 150)'::geometry,
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'LINESTRING (10 10, 10 150, 130 10)'::geometry);
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-- 14.142135623730951
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-- hausdorf with densification
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SELECT 'hausdorffdensify_ls_ls', st_hausdorffdistance(
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'LINESTRING (130 0, 0 0, 0 150)'::geometry
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, 'LINESTRING (10 10, 10 150, 130 10)'::geometry, 0.5);
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-- 70.0
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