[GRASS-user] r.report

Hi users, Can someone help with this doubt of mine? When I run r.report on a raster, it says that 48% of my cells have no no data - does this refers to NULL cells? (if so, than it's ok, otherwise I must recheck my data). Thanks in advance --

Re: [GRASS-user] High Resolution ppm

Thank you Hamish! I just added NetPBM to the %PATH% and now it works. Thanks a lot! Cheers André Mano 2012/7/19 Hamish hamis...@yahoo.com André wrote: Thank you for your hints, however I didn't managed to solve the problem. I installed NetPBM tools has you suggested, however I still get

[GRASS-user] High Resolution ppm

Hi, Has anyone here ever merged the output tiles obtained through Maximum resolution ppm option in nviz? How can I transform tens of files in just one high resolution .jpg/.png? Best wishes André -- --- Associação Leonel Trindade

Re: [GRASS-user] Strange r.slope.aspect output of Aster dem

Probably you changed resolution of the rasrter itself before runing r.aspect.slope. Has Maris said, try to first run the module with DEM native resolution, and then, if you need a better resolution, set it in yout region and then run r.resample. André 2012/3/13 Maris Nartiss

Re: [GRASS-user] Cost Path

a filling of the dtm and also of walkout map in order to avoid aq loop effect All the best, Roberto 2012/2/7 Moritz Lennert mlenn...@club.worldonline.be On 07/02/12 14:39, ALT SHN wrote: Hello list, I have a raster obtained through r.mapcalc whose cells values represent friction

[GRASS-user] Cost Path

Hello list, I have a raster obtained through r.mapcalc whose cells values represent friction or cost. To finish my study I'm lacking one final step - calculate the least cost path! How do I do it? I've tried r.cost but the result is not wat I expected - My desired output is just a line from A to

Re: [GRASS-user] Null or 0?

Patrice, Daniel, Thank you for your commments - it shaded some light on the subject. Regards, André Mano 2012/2/5 Patrice Dumas pertu...@free.fr On Sun, Feb 05, 2012 at 07:22:29AM -0200, Daniel Victoria wrote: Hi Andre, On raster algebra, operations using null will return null while

[GRASS-user] Null or 0?

Hello, I have a technichal doubt. I used* v.to.rast.constant *to tranform a line vector layer to raster. This meant i have a raster with NULL values. The output raster is to be used in map algebra operations. So my question is: Is it advisable to set the Null cells to 0? I know r.calc works

[GRASS-user] Hidrological network

Hello, I Have a vector layer with all the rivers, and subsidiaries up to the smallest water lines. However I need to simplify this layer in order that it only shows the main rivers and first, second and third order tributary water lines. Any hints on how to achieve this? Best Regards, André

Re: [GRASS-user] Re: Hidrological network

Thank you for your suggestions. It seems I will be having a hard time!! @Jarek - The vector has a good topology (I tested the topology using the layer to run a simple nearest path analysis and it worked, so I assume it's ok) I checked the attribute table and it has hundreds of objects and only

[GRASS-user] v.to.points

Hello, I'm having problmes with module v.to.points. The input is a line shapefile with only two atributtes (both of them integers). I always get this error message: v.to.points input=AplanadoGRASS@InterpolationTEST type=line llayer=1 output=C:/Users/Andre

Re: [GRASS-user] v.to.points

it helps, Marcello. On Tue, Oct 18, 2011 at 9:59 AM, ALT SHN i.geograf...@alt-shn.org wrote: Hello, I'm having problmes with module v.to.points. The input is a line shapefile with only two atributtes (both of them integers). I always get this error message: v.to.points input=AplanadoGRASS

Re: [GRASS-user] OCR

Thank you for your suggestions! I'll begin to explore Ocrad (thanks for the tip Markus). If I achieve relevant results will share them here. best regards, André 2011/5/5 Markus Neteler nete...@osgeo.org On Wed, May 4, 2011 at 11:18 AM, ALT SHN i.geograf...@alt-shn.org wrote: Hello

[GRASS-user] OCR

Hello, This might seem a Little off topic, but maybe someone here can help me. I need to extract toponomical data from old digitized paper maps. I wish to explore *Optical character recognition (OCR). Does anyone has a suggestion/experience with this kind of challenge? Thank you, André Mano *

[GRASS-user] r.mapcalculator

Hello users, I really could use some hints regarding this problem. I want to generate a new raster from the following expression (using r.mapcalculator from QGIS GRASS plugin): A*0.5+B*0.05+C*0.2+D*0.2+E*0.05 All rasters are integer16 geotiff anda have the same resolution. I just get this