José María Michia Roberts:
[...]
many elements disappear after importing the layer,
and more elements disappear after applying v.transform
[...]
In reply to myself: I now remember that I had solve this by adding
-c to v.in.ogr, so the output layer is not cleaned and all source
elements
Hi all!
I've found that values of transformation matrix reported by
v.transform are erroneous after using this values in ST_Affine (a
PostGIS's function).
The values that seems to be erroneous are x_offset and y_offset. The
rotation values seems to are fine.
The transformed elements are ok (it
2013/2/22 Rainer M Krug r.m.k...@gmail.com:
Please check out the thread Call Grass modules from C++ code
(http://article.gmane.org/gmane.comp.gis.grass.user/46272)
I assume it is the same for C
Thanks Rainer. My apologies for re-post this question. I worked hard
looking for a solution, to
Hi all!
I need to use v.transform over layers that are topologically
incorrect (so they have overlapped polygons, and it is not a
problem). Of course, many elements disappear after importing the
layer, and more elements disappear after applying v.transform.
To solve this, I wrote a python
. Maybe someone can point me to the best
example of that case.
Thank in advance!
José María Michia
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Hi,
2013/2/8 Afsal Iqubal afsal.iqu...@gmail.com:
hii
i am new to grass. i am using ubuntu 12.04. how to istall grass in
ubuntuplease help
GRASS binaries are available from official repository. You can find
installation instructions on the wiki:
of some map, use:
r.info map=name_of_raster_map
And an important note: I'm not sure if this information is applicable
using the plugin in QGIS.
Please, sorry again, I make many mistake but with the best intentions!
Saludos
2009/2/13 José María Michia jose.maria.mic...@gmail.com:
Hi Tim and all
Hi Tim and all!
2009/2/13 Tim Holland timothyholl...@gmail.com:
Dear all,
I am new to both Grass and this forum, so apologies in advance for something
which is likely a simple mistake or oversight on my part (but I have
searched the forum and can't seem to find an answer).
I am trying to
2009/1/25 Stefanie Obmann stef...@gmx.at
Dear GRASS users,
I try to import an ascii file which should then be a table with 11 columns:
gg length, gg latitude, hight above sea level, int number column, name, 6
columns including different values;
If I do the v.in.ascii command I get a
2009/1/25 mtnbiketr...@zzz.com:
Hi,
beginner user. First off, am disappointed with help files for syntax for
ogr2ogr.
I have a shp file( with .shx, and .dbf) and want to convert it to a
different projection. When I run ogr2ogr from command line, it doesn't do
anything, I tried to set the
Perhaps that solves the problem.
Additionally, d.vect can show node numbers with
disp=topo
This should, in combination with d.zoom help to identify the
(I suppose) data problem.
Markus
Thanks. Using this advice, I've found the problem: a road isolated
from the rest.
Other command that
FYI, I have hadd good luck with v.net.salesman using the latest 6.4-SVN:
http://casoilresource.lawr.ucdavis.edu/drupal/node/698
Dylan
Thanks for the link. Very nice example!
Saludos
José María
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2008/12/31 Markus Neteler nete...@osgeo.org:
Hi José,
On Wed, Dec 31, 2008 at 8:39 AM, José María Michia
jose.maria.mic...@gmail.com wrote:
Hello everyone. I'm trying v.net.salesman module. I followed the
instructions in the manual page. All tests are good, except one case,
which returns
2008/12/31 Dylan Beaudette dylan.beaude...@gmail.com:
On Wed, Dec 31, 2008 at 5:20 AM, Markus Neteler nete...@osgeo.org wrote:
Hi José,
On Wed, Dec 31, 2008 at 8:39 AM, José María Michia
jose.maria.mic...@gmail.com wrote:
Hello everyone. I'm trying v.net.salesman module. I followed
2008/12/31 吉藤奈津子 nats...@forest.kyushu-u.ac.jp:
Hello.
I have some trouble in using v.to.rast.
Could anyone help me, please?
I imported ascii vector data (position data) using v.in.ascii, then
converted it into raster data using v.to.rast as follows;
v.in.ascii input=test.txt output=test
Hello everyone. I'm trying v.net.salesman module. I followed the
instructions in the manual page. All tests are good, except one case,
which returns the following error:
v.net.salesman myroads_net ccats=1-237 out=mysalesman2
Number of cities: [237]
Building graph...
Registering arcs...
100%
reports invalid values
(i.e., lon180). But, I've solved this problem by editing the TFW
file manually (I think that this is correct approach).
Thanks Daniel.
DAniel
On Thu, Dec 11, 2008 at 12:23 PM, José María Michia
jose.maria.mic...@gmail.com wrote:
Hi list. Sorry for the very basic
2008/12/12 Hamish hamis...@yahoo.com:
Daniel wrote:
To transfer from one location to another take a look at r.proj
It's used to do projection transformation and it does so by copying
from one location to another I guess it should work if both
locations have the same projection, that is,
Hi list. Sorry for the very basic question. I can not find a convincing way
to do it myself.
I need to copy a raster map from one location to another. I've think this
options:
- use a intermediary format, like ASCII
- use r.pack/r.unpack
- copy manually the files needed. I think that the files
2008/12/5 Micha Silver [EMAIL PROTECTED]:
georgew wrote:
Much progress!
My only remaining question is: Is there a way to use the track raster file
to input the values instead of using the mouse, so that the process can be
more or less automated? Thank you all for your great help. I'll write
2008/11/16 Kurt Springs [EMAIL PROTECTED]:
Hi folks,
I am trying to convert ascii files that I bought from the Irish Ordinance
Survey in to GRASS vector format. These are digital terrain models. I want
to eventually make a raster surface map and a 3d raster map out
demonstrating where
2008/10/19 Wolf Bergenheim [EMAIL PROTECTED]:
José María,
If possible, I think it would be useful feature the following:
- Where two labels overlap, comparing an attribute to decide which one stays
For example: on a map of cities you can use the number of inhabitants.
If the city A has
2008/10/19 Wolf Bergenheim [EMAIL PROTECTED]:
José María,
If possible, I think it would be useful feature the following:
- Where two labels overlap, comparing an attribute to decide which one stays
For example: on a map of cities you can use the number of inhabitants.
If the city A has
2008/10/18 Wolf Bergenheim [EMAIL PROTECTED]:
On 18.10.2008 02:30, José María Michia wrote:
But my map has many elements. It is necessary to
suppress some labels, or some points.
Yes, v.label.sa doesn't suppress any labels. That is also the main
difference between PAL and v.label.sa
2008/10/17 Markus Neteler [EMAIL PROTECTED]:
On Thu, Oct 16, 2008 at 11:40 PM, José María Michia
[EMAIL PROTECTED] wrote:
Hi all.
I have a map of cities. I want to draw labels using city names, but,
some generalization is needed. In other words, some labels overlap
with other labels.
You
Hi all.
I have a map of cities. I want to draw labels using city names, but,
some generalization is needed. In other words, some labels overlap
with other labels.
I installed grass63 to use v.generalize, but I see that I can not use
that tool with maps of points. Please, I need some suggestions.
Hi,
I wish to export a subset with something like:
v.out.ascii.db input=localidades columns=PROVINCIA,DARTAMENTO,LOCALIDAD,TIPO
But I wish to export only vectors from within current region. So, I
can use v.overlay. This option uses a intermediate map. I wish to know
what other alternatives
2008/10/8 Nikos Alexandris [EMAIL PROTECTED]:
On Tue, 2008-10-07 at 01:37 +0100, Glynn Clements wrote:
José María Michia wrote:
I've imported a NetCDF file (ETOPO1 model). The resulted raster appears
flipped vertically. How can I fix this? I try with mapcalc, without
success
Hi,
I've imported a NetCDF file (ETOPO1 model). The resulted raster appears
flipped vertically. How can I fix this? I try with mapcalc, without success:
- neighborhood modifier: not accept computations in offset parameter, like
map[0,total_rows-row()]
- I dont know how to query map in arbitrary
Hi,
v.in.ascii to import the points (looks good from display)
v.to.rast
r.resamp.interp to interpolate the gaps
Maybe your approach is correct, but I've never used this command for
interpolation.
If you wish, try this:
v.in.ascii (same as before)
g.region -p -a
I need to create countour... so, I think, I must interpolate a surface from
this points making something like a DEM, and after, interpolate the
contours... Is this correct?
Yes.
In addition to IDW, you can use RST for interpolate points and
generate a raster surface.
First all, set
Hi Carlos. You can use v.surf.rst. Description (from command help):
Spatial approximation and topographic analysis from given ... isoline data
in vector format to floating point raster format using regularized spline
with tension.
Basic usage (remember to adjust region settings):
v.surf.rst
2008/8/25 Dylan Beaudette [EMAIL PROTECTED]:
On Monday 25 August 2008 08:59:33 am Paulo Marcondes wrote:
2008/8/23 Paulo Marcondes [EMAIL PROTECTED]:
I have been interested in implementing potential fields function in
GRASS since long,
but I don't have the necessary background (I mean, I
José,
I have been interested in implementing potential fields function in
GRASS since long,
but I don't have the necessary background (I mean, I don't know the
equations) or the coding skills.
However, I can help you test/debug.
Maybe that could be the starting point for me to learn
Hello. I can not use the number pi in r.mapcalc. I tried these ways:
r.mapcalc 'prueba = pi()'
r.mapcalc 'prueba = pi'
r.mapcalc 'prueba = PI()'
r.mapcalc 'prueba = PI'
With the following results:
Syntax error
Is this normal? Is IP defined within GRASS / r.mapcalc?
Thanks for your help.
José
2008/8/23 Glynn Clements [EMAIL PROTECTED]:
r.mapcalc doesn't have a definition for pi; you'll need to enter a
literal value.
Thanks Glynn. This sounds like a weak point for me.
I need to introduce Pi several times. Not for converting degrees to
radians. It is another class of applications.
2008/8/23 José María Michia [EMAIL PROTECTED]:
Is it possible to define variables?
2008/8/23 Glynn Clements [EMAIL PROTECTED]:
Yes; an assignment anywhere other than at the top level will define a
variable rather than an output map. You can either place the
assignment at the point that you
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