mirror of
https://git.osgeo.org/gitea/postgis/postgis
synced 2024-10-24 09:02:37 +00:00
9bb86a38b8
git-svn-id: http://svn.osgeo.org/postgis/trunk@10154 b70326c6-7e19-0410-871a-916f4a2858ee
126 lines
3.1 KiB
PL/PgSQL
126 lines
3.1 KiB
PL/PgSQL
DROP TABLE IF EXISTS raster_nearestvalue;
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CREATE TABLE raster_nearestvalue (
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rast raster
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);
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CREATE OR REPLACE FUNCTION make_test_raster()
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RETURNS void
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AS $$
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DECLARE
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width int := 10;
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height int := 10;
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x int;
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y int;
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rast raster;
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valset double precision[][];
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BEGIN
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rast := ST_MakeEmptyRaster(width, height, 0, 0, 1, -1, 0, 0, 0);
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rast := ST_AddBand(rast, 1, '8BUI', 1, 0);
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valset := array_fill(0., ARRAY[height, width]);
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FOR y IN 1..height LOOP
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FOR x IN 1..width LOOP
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valset[y][x] := 2 * x + (1/3) * y;
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END LOOP;
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END LOOP;
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rast := ST_SetValues(rast, 1, 1, 1, valset);
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rast := ST_SetValue(rast, 1, 1, 0);
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rast := ST_SetValue(rast, 4, 1, 0);
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rast := ST_SetValue(rast, 7, 1, 0);
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rast := ST_SetValue(rast, 10, 1, 0);
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rast := ST_SetValue(rast, 2, 3, 0);
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rast := ST_SetValue(rast, 5, 3, 0);
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rast := ST_SetValue(rast, 8, 3, 0);
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rast := ST_SetValue(rast, 3, 5, 0);
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rast := ST_SetValue(rast, 6, 5, 0);
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rast := ST_SetValue(rast, 9, 5, 0);
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rast := ST_SetValue(rast, 1, 7, 0);
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rast := ST_SetValue(rast, 4, 7, 0);
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rast := ST_SetValue(rast, 7, 7, 0);
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rast := ST_SetValue(rast, 10, 7, 0);
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rast := ST_SetValue(rast, 2, 9, 0);
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rast := ST_SetValue(rast, 5, 9, 0);
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rast := ST_SetValue(rast, 8, 9, 0);
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INSERT INTO raster_nearestvalue VALUES (rast);
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RETURN;
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END;
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$$ LANGUAGE 'plpgsql';
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SELECT make_test_raster();
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DROP FUNCTION IF EXISTS make_test_raster();
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SELECT
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ST_NearestValue(rast, 1, 1, 1)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(ST_SetBandNoDataValue(rast, NULL), 1, 1, 1)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 2, 2)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 5, 5)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 5, 5)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 11, 11)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 12, 12)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 0, 0)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, 0, 2)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, -1, 3)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, -9, 3)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, -9, 3, FALSE)
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(1, 1))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(2, 2))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(5, 5))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(5, 5))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(11, 11))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(12, 12))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(0, 0))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(0, 2))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(-1, 3))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(-9, 3))
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FROM raster_nearestvalue;
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SELECT
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ST_NearestValue(rast, 1, ST_MakePoint(-9, 3), FALSE)
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FROM raster_nearestvalue;
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DROP TABLE IF EXISTS raster_nearestvalue;
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