Hi
It is still giving me -NULL value error.
Do you think maybe its the way I downloaded my rainfall data? This is the
site where I downloaded my data sets* ftp://trmmopen.gsfc.nasa.gov/pub/gis/
*and this data covers the whole world, the only thing I did was to clip a
specific region (using
Thanks Micha for your help but I got an error while doing this
1- Create new empty vectorial
2- run v.db.addtable command that you kindly sent me
3- use v.digit as defined previously
4- Inside tcltk's digitizing menu select Digitize new Centroid
5- Leave layer as 1
6- Change Mode to Manual Entry
Hi
It is still giving me -NULL value error.
Do you think maybe its the way I downloaded my rainfall data? This is the
site where I downloaded my data sets* ftp://trmmopen.gsfc.nasa.gov/pub/gis/
*and this data covers the whole world, the only thing I did was to clip a
specific region (using
Hi there
I have tried to compile r.seg, a Segmentation developed by Trento
University. I Know this is not part of GRASS6.4 and not even an addon but
can you help me on this? (where I got the module
http://www.ing.unitn.it/~grass/)
This is the command:sudo make -C r.seg
Hi
I'm not familiar with bash scripting, I want to write a script that starts
GRASS and create a new LOCATION and a MAPSET, specify the coordinate system
for my database, specify a geodetic datum for the LOCATION, import datasets
into the GRASS, do watershed analysis on the DEM data set, convert
Hi,
I compiled r.seg in grass 6.5 (Ubuntu 10.04) but it must be the same in
grass 6.4. Just copy r.seg directory to the raster subdirectory of the
grass source code tree.
cd /usr/local/grass-6.4.0svn/ratster/r.seg
make
when done...
cd /usr/local/grass-6.4.0svn
make
sudo make install.
Hope it
Hello Leonardo
It wAs more or less what I have done. Thanks... My only question was related
with binary file because it's slightly different from the others..
Regarding r.seg usability: have you tried/used? I'm having some difficulties
in using and parameterizing and there is not much information
Hi,
I am new to grass and don't really know where to start.
Please give me some hints on
1) how to import+project a vector-shapefile (containing one layer of
non-overlapping administrative regions) with unknown
projection+coordinate-system into a database with latitude/longitude
2) how to
stn wrote:
I am new to grass and don't really know where to start.
here is a good place:
http://grass.osgeo.org/wiki/GRASS_Help
also the GRASS book is very good.
also Markus's quick intro guides:
http://grass.osgeo.org/grass64/manuals/html64_user/index.html
Please give me some hints on
On 06/17/2010 08:59 PM, stn wrote:
Hi,
I am new to grass and don't really know where to start.
With the man pages ;-)
Please give me some hints on
1) how to import+project a vector-shapefile (containing one layer of
non-overlapping administrative regions) with unknown
2) how to import+project a e00-rasterfile into the same database (containing
rasterpoints 1kmx1km, each with one scalar property)
This solution may not help if ESRI software is inaccessible, but
perhaps the maintainer of the .e00 data can do this conversion for
you. I verified it does work (I
On 06/17/2010 12:36 PM, Jenny Turner wrote:
Thanks Micha for your help but I got an error while doing this
1- Create new empty vectorial
2- run v.db.addtable command that you kindly sent me
3- use v.digit as defined previously
4- Inside tcltk's digitizing menu select Digitize new Centroid
5-
Hello,
I have a raster map (dem) and I want to select a region of the raster
corresponding to a polygon that is in a vector map. What is the best
way to do this? It looks like r.in.poly might be along the lines of
what I need but in that case I think I would need to generate the ascii
poly
2010/6/17 Hamish hamis...@yahoo.com
you have to create a GRASS Location for each source map projection, then
pull them all into the target Location with r.proj or v.proj.
Hi Hamish, thanks for the infos.
Here is one thing I can't get into my head.
First there is the problem that I do not
Kwas wrote:
Hello,
I have a raster map (dem) and I want to select a region of the raster
corresponding to a polygon that is in a vector map.nbsp; What is the best
way to do this?nbsp; It looks like r.in.poly might be along the lines of
what I need but in that case I think I would need
and parameterizing and there is not much information about it. Do
you have any additional information?
Thanks
Katrin
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(Apologies for the interference...)
Hamish:
you have to create a GRASS Location for each source map projection, then
pull them all into the target Location with r.proj or v.proj.
stn wrote:
Hi Hamish, thanks for the infos.
Here is one thing I can't get into my head.
First there is the
Nikos Alexandris wrote:
If I am not wrong even under @rc-gis the .prj is required to work properly.
No, the .prj is not required but without it the dataset's coordinate system
is undefined.
The .prj file for a shapefile is in WKT (well known text) format, and generally
the coordinate
As others have said, a shapefile is composed of several other files
(.shp, .shx, .dbf, .prj), each containing some different info. So,
even though the polygons and points coordinates are inside the .shp
file, you need to know the projection in order to know what those
coordinates represent
Nikos Alexandris wrote:
If I am not wrong even under @rc-gis the .prj is required to work
properly.
On Friday 18 of June 2010 02:48:02 Andrew MacIntyre wrote:
No, the .prj is not required but without it the dataset's coordinate
system is undefined.
The .prj file for a shapefile is in WKT
[...]
On Friday 18 of June 2010 03:47:25 Daniel Victoria wrote:
Of course the values of the coordinates can give you some hints as to
if you are working with UTM, lat/long etc...
--8---
For example, what is the output of ogrinfo Shapefile.shp -al -ro -so?
Nikos
Marcello wrote:
There is probably a better way to do that (and I would like to
hear it very much, specially if there is a single command
to do this), but for now, I think the code below does the job:
g.region vect=your_vector
v.extract input=your_vector output=selected_polygon type=area
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