On 10/19/2010 04:03 PM, Monica Buescu wrote:
Hi Mich
Thanks for the reply. I think it has worked but everytime I try to
open, my winGRASS goes "bananas".
Hope you get some whipped cream with that ;-)
Just to sum what I have done
1- Import a xyz ASCII file that is a float with a range of [166297.00
- 20855944.0] (not all values are used) and Rows: 4655
;Columns: 4520 .
About 20,000,000 cells. That should be OK.
Do you know how many different values are actually in the data?
2- I did r.mapcalc int() to this file that gets the range of [166297
20855944].
QUESTION: can I apply int to a FLoat with values as big as this?
An integer raster is represented by 32 bit signed integer values i.e.
from (about) -2 billion to +2 billion. So you're OK here.
3- I did r.mode base=int_base coverage= 1107...@permanent (it's a
high-resolution image) output=output1
Ok it runs (it takes some time as expected)
Thern if I try to display it freezes... Even If I just try r.info
<http://r.info> output1 it also freezes.
I'd try two things here. First can you change to a smaller region and
rerun r.mode and try to display the results?
Second: the result of r.mode is a "reclass" of the original values. So I
suppose it has to be recalculated each time you want to display. You can
make that reclass map into a permanent raster by running:
r.mapcalc "output2 = output1"
Then try displaying the output2.
Any thoughts aboutt this? (Thanks Micha)
On Tue, Oct 19, 2010 at 2:14 PM, Micha Silver <[email protected]
<mailto:[email protected]>> wrote:
Monica Buescu wrote:
Greetings
This new topic is related with
I need to calculate mode for a base map that is composed by
float values.
r.mode base=b...@permanent cover=1107...@permanent output=saida
And I get:
ERROR: reading r.stats output
ERROR: No rules specified
This means that I'm not being able to apply this function just
because my base map is a Float. Any ideas of how to fix this?
How about r.mapcalc base_integer=int(base) ?
The base map should be integer (category ) values, where the mode
is calculated for all cells with the same cat value, so it indeed
should be an integer raster.
Thanks
Monica
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Micha Silver
Arava Development Co. +972-52-3665918
http://www.surfaces.co.il
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