[GRASS-dev] GAL Framework and GRASS rasters

Radek Bartoň xbarto33 at stud.fit.vutbr.cz
Sun Oct 28 19:02:29 EDT 2007

Hi Glynn.

First of all, thanks for your answers.

Dne Sunday 28 of October 2007 22:46:05 Glynn Clements napsal(a):
> Radek Bartoň wrote:

> The row argument passed to G_get_raster_row() is converted from the
> region's grid to the raster's grid (by compute_window_row in
> get_row.c) to determine which row to read from the file.
> If the region resolution is coarser than the map's resolution, a
> contiguous sequence of region rows will result in a discontiguous
> sequences of raster rows.

So some further computation over high-detailed data is needed.

Are the number of columns in returned row at finest resolution or at coarse?

Are rows from finer resolution that are not in coarse resolution just skipped 
away or are there possibilities to apply for example low-pass filter or 
reclassification during rescale?

Bc. Radek Bartoň

Faculty of Information Technology
Brno University of Technology

E-mail: xbarto33 at stud.fit.vutbr.cz
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