PostGIS Raster : Extending PostgreSQL for The Support of ... - CoDE

access of any part of a single band. It can also handle any number of bands and accommodates black
and white, grayscale, pseudocolor, true color and multi-spectral image data.
Figure 4.43: Storing in-database raster.
For example, the following SQL command will create a raster table containing two dummy rasters,
each one is stored in a single row using BSQ:
Create table dummy_rast(rid integer, rast raster);
Insert into dummy_rast(rid, rast)
Values (1,
-- Raster: 0 band, Nodata = 0
(’01’ -- little endian (uint8 ndr)
||
’0000’ -- version (uint16 0)
||
’0000’ -- nBands (uint16 0)
||
’0000000000000040’ -- scaleX (float64 2)
||
’0000000000000840’ -- scaleY (float64 3)
||
’000000000000E03F’ -- ipX (float64 0.5)
||
’000000000000E03F’ -- ipY (float64 0.5)
||
’0000000000000000’ -- skewX (float64 0)
||
’0000000000000000’ -- skewY (float64 0)
||
’00000000’ -- SRID (int32 0)
||
’0A00’ -- width (uint16 10)
||
’1400’ -- height (uint16 20)
)::raster),
-- Raster: 5 x 5 pixels, 3 bands, 8BUI pixel type, NoData = 0
(2, (’01000003009A9999999999A93F9A9999999999A9BF000000E02B274A’ || ’410000000077195
64100000000000000000000000000000000FFFFFFFF050005000400FDFEFDFEFEFDFEFEFDF9FAFEFEFC
F9FBFDFEFEFDFCFAFEF’ || ’EFE04004E627AADD16076B4F9FE6370A9F5FE59637AB0E54F586170870
40046566487A1506CA2E3FA5A6CAFFBFE4D566DA4CB3E454C5665’)::raster);
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