[GRASS-user] v.transform reports erroneous values in the transformation matrix

2013-02-26 Thread José María Michia Roberts
Hi all! I've found that values of transformation matrix reported by v.transform are erroneous after using this values in ST_Affine (a PostGIS's function). The values that seems to be erroneous are x_offset and y_offset. The rotation values seems to are fine. The transformed elements are ok (it

Re: [GRASS-user] v.transform reports erroneous values in the transformation matrix

2013-02-26 Thread Markus Metz
On Tue, Feb 26, 2013 at 2:17 PM, José María Michia Roberts jose.maria.mic...@gmail.com wrote: Hi all! I've found that values of transformation matrix reported by v.transform are erroneous after using this values in ST_Affine (a PostGIS's function). The values that seems to be erroneous are

Re: [GRASS-user] v.transform reports erroneous values in the transformation matrix

2013-02-26 Thread Jose M Michia Roberts
2013/2/26 Markus Metz markus.metz.gisw...@gmail.com: Note that there are two transformation matrices, one for forward transformation, one for backward transformation. Can the PostGIS ST_Affine function print both matrices? AFAIK, PostGIS cannot print neither calculate transformation matrices.