Raster Coordinate System pixel count start

Dimap 1.1.3 SPOTView Profile

<PIXEL_ORIGIN>

Dimap_Generic 1.0

Description :

The raster pixel array can start from 0 or 1 depending on the production context and the habits.

This has a direct consequence on the interpretation of pixel coordinates keywords. If PIXEL_ORIGIN is set to 0 (which is the default), the first pixel starts from 0.0. Therefore if RASTER_CS_TYPE is CELL, then the 0.0, 0.0 raster coordinates relate to the top-left corner of the top-left cell of the pixel array (in this case 0.5,0.5 is the center of the top-left raster pixel). Usually, if RASTER_CS_TYPE is POINT then PIXEL_ORIGIN is set to 1 (this is not systematic but the way it is generally done); as a consequence, in that latter case, the 1.0,1.0 pixel coordinate points to the center of the top-left corner pixel.

By default (when not cited) PIXEL_ORIGIN = 0.

Example :
 
<Raster_CS>
  <RASTER_CS_TYPE>CELL</RASTER_CS_TYPE>
  <PIXEL_ORIGIN>0</PIXEL_ORIGIN>
</Raster_CS>

Datatype : t_PIXEL_ORIGIN (based on Pixel_Origins)

Pixel_Origins (based on xsd:integer)
Range : [0 ,1]

Possible parent(s)

Raster_CS