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 : > 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. User must obtain matrices v

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 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 x_offset and y_offset

[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 i