[GRASS-user] i.rectify update in 6.4

GRASS GRASS user
1

Hi all,

the image rectification tool i.rectify has been updated in GRASS 6.4
as of r46222, after extensive testing in 6.5 and 7.0. Scripts work as
before, but should execute faster.

There are new options, one to select the resampling method (nearest,
bilinear, bicubic), one to set the target resolution, and one to
control memory usage of the module. These options are similar to
r.proj, which performs conceptually similar operations, namely
translating coordinates and fetching (resampling) the corresponding
pixel from the source image.

Enjoy,

Markus M

2

On Mon, May 9, 2011 at 6:03 PM, Markus Metz
<markus.metz.giswork@googlemail.com> wrote:

Hi all,

the image rectification tool i.rectify has been updated in GRASS 6.4
as of r46222, after extensive testing in 6.5 and 7.0. Scripts work as
before, but should execute faster.

There are new options, one to select the resampling method (nearest,
bilinear, bicubic), one to set the target resolution, and one to
control memory usage of the module. These options are similar to
r.proj, which performs conceptually similar operations, namely
translating coordinates and fetching (resampling) the corresponding
pixel from the source image.

I have made a test with the old and new version in GRASS 6.4.svn (using
bilinear resampling):
- it is WAY faster
- the result is pretty nice and matches well the old results except for the
  differences originating from the different resampling method.

great job,
Markus

3

Hi,

2011/5/9 Markus Metz <markus.metz.giswork@googlemail.com>:

the image rectification tool i.rectify has been updated in GRASS 6.4
as of r46222, after extensive testing in 6.5 and 7.0. Scripts work as
before, but should execute faster.

I took liberty to note that at

http://trac.osgeo.org/grass/wiki/Release/6.4.2RC1-News#Majormodulechanges

Martin

--
Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa

4

On Mon, May 9, 2011 at 6:08 PM, Martin Landa <landa.martin@gmail.com> wrote:

Hi,

2011/5/9 Markus Metz <markus.metz.giswork@googlemail.com>:

the image rectification tool i.rectify has been updated in GRASS 6.4
as of r46222, after extensive testing in 6.5 and 7.0. Scripts work as
before, but should execute faster.

I took liberty to note that at

http://trac.osgeo.org/grass/wiki/Release/6.4.2RC1-News#Majormodulechanges

Thanks!

Markus M