[postgis-devel] [wktraster] Regular blocking and rotation

Mateusz Loskot Mateusz.Loskot at cadcorp.com
Thu Nov 19 03:31:02 PST 2009


Hi,

I think rotation property of regular blocking needs to be
specified explicitly and clearly in the WKT Raster specification.

Current document [1] makes explicit use of word "rotation" only once:

"
5. The extent field must be a simple rectangle (non-rotated).
"

Next, there is no rotation included in the schema of RASTER_COLUMNS table.

It seems to be enough to conclude that regular blocking coverage
is never rotated. But, is this conclusion correct?
I've scanned through all archived WKT Raster discussions 
and I couldn't find any confirmation.

[1] http://trac.osgeo.org/postgis/wiki/WKTRaster/SpecificationWorking01

Best regards,
--
Mateusz Loskot
Senior Programmer, Cadcorp
http://www.cadcorp.com




****************************************************************************
This email is confidential and may be privileged and should not be used, 
read or copied by anyone who is not the  original intended recipient. If you 
have received this email in error  please inform the sender and delete it 
from your mailbox or any other storage mechanism. Unless specifically 
stated, nothing in this email constitutes an offer by Cadcorp and Cadcorp 
does not warrant that any information contained in this email is accurate. 
Cadcorp cannot accept liability for any statements made which are clearly 
the sender's own and not expressly made on behalf of Cadcorp or one of its 
agents. Please rely on your own virus check. No responsibility is taken by 
Cadcorp for any damage arising out of any bug or virus infection. 
****************************************************************************


More information about the postgis-devel mailing list