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create EXTENSION if not exists pointcloud;
INSERT INTO pointcloud_formats (pcid, srid, schema)
VALUES (5, 0,
'<?xml version="1.0" encoding="UTF-8"?>
<pc:PointCloudSchema xmlns:pc="http://pointcloud.org/schemas/PC/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<pc:dimension>
<pc:position>1</pc:position>
<pc:size>4</pc:size>
<pc:description>X coordinate as a long integer. You must use the scale and offset information of the header to determine the double value.</pc:description>
<pc:name>X</pc:name>
<pc:interpretation>int32_t</pc:interpretation>
<pc:scale>0.01</pc:scale>
</pc:dimension>
<pc:dimension>
<pc:position>2</pc:position>
<pc:size>4</pc:size>
<pc:description>Y coordinate as a long integer. You must use the scale and offset information of the header to determine the double value.</pc:description>
<pc:name>Y</pc:name>
<pc:interpretation>int32_t</pc:interpretation>
<pc:scale>0.01</pc:scale>
</pc:dimension>
<pc:dimension>
<pc:position>3</pc:position>
<pc:size>4</pc:size>
<pc:description>Z coordinate as a long integer. You must use the scale and offset information of the header to determine the double value.</pc:description>
<pc:name>Z</pc:name>
<pc:interpretation>int32_t</pc:interpretation>
<pc:scale>0.01</pc:scale>
</pc:dimension>
<pc:dimension>
<pc:position>4</pc:position>
<pc:size>2</pc:size>
<pc:description>The intensity value is the integer representation of the pulse return magnitude. This value is optional and system specific. However, it should always be included if available.</pc:description>
<pc:name>Intensity</pc:name>
<pc:interpretation>uint16_t</pc:interpretation>
<pc:scale>1</pc:scale>
</pc:dimension>
<pc:metadata>
<Metadata name="compression">laz</Metadata>
</pc:metadata>
</pc:PointCloudSchema>'
);
CREATE TABLE IF NOT EXISTS pa_compression_laz (
pa PCPATCH(5)
);
\d pa_compression_laz
INSERT INTO pa_compression_laz (pa)
SELECT PC_Patch(PC_MakePoint(5, ARRAY[x,y,z,intensity]))
FROM (
SELECT
-127+a/100.0 AS x,
45+a/100.0 AS y,
1.0*a AS z,
a/10 AS intensity,
a/400 AS gid
FROM generate_series(1,100000) AS a
) AS values GROUP BY gid;
TRUNCATE pointcloud_formats;
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