this morning and
didn't see that.
By googling I got to a list of mirror sites and found that the official site
is (and probably has been for some time) http://grass.osgeo.org/, but
*IT* also contains nothing but [unknown mirror country]
Same here
--
Micha Silver
Arava Development Co, Sapir, Israel
|
|
|
++
Is the region too large?
Thanks,
Micha
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(responding to myself)
I've gotten part way thru my problem, but I'm stuck with the attribute
table. See below
Micha Silver wrote:
I could use some guidance with linear referencing and
v.build.polylines. I want to get the distances between posts along a
bike trail. I have vector maps
Hello Nikos:
Nikos Alexandris wrote:
GRASSers and GDALers,
thank you for giving life to your mailing lists, these Treasures of
Knowledge.
I've written with your help another small article in ISPRS' (Student
Consortium) Newsletter.
A very impressive article/tutorial! Can it be
the final few distances by hand.
Is there any way to work around this?
Thanks
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+972-8-6592270
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Richard Peskin wrote:
I want to use GRASS (and QGIS) for analysis of water well locations in
a town. The basic data has been provided thru (ARCWare) shapefiles.
While input of data to create the well location point maps is no
problem, the shapefile format embeds the real spatial location
georgew wrote:
What, no takers? Just a Yes or No will be already of great help to me,
Yes.
I think you should be looking at converting the shapefile contour lines
to a raster, then make an elevation surface from that, and use the
r.profile module to calculate elevation profiles for the
I have
no problems sending them to you.
Let's keep stabbing at it from your end. That's always the best way to
understand the methodology.
Micha Silver wrote:
Yes.
I think you should be looking at converting the shapefile contour lines
to a raster
v.in.org to import
georgew wrote:
Thanks Micha, here we go:
Micha Silver wrote:
How many shapefiles did you have in the GRASSDATA directory?
provide the boundaries. Here is the result: r.info contours_rast
++
| Layer
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 a summary and post it in the Wiki as an
Happy New Year to all!
I want to run some r.le analyses on rasters I will create from two
ortho-photo images. The newer ortho-photo is full color, so when
importing into GRASS I get the three RGB bands. So I make an image group
and subgroup with the three bands and I can do the clustering.
Markus Neteler wrote:
On Thu, Jan 1, 2009 at 4:06 PM, Micha Silver mi...@arava.co.il wrote:
Happy New Year to all!
Happy New Year!
I want to run some r.le analyses on rasters I will create from two
[please consider r.li which way faster]
Thanks for the tip.
ortho
Dylan Beaudette wrote:
On Thu, Jan 1, 2009 at 10:57 AM, Micha Silver mi...@arava.co.il wrote:
One set of aerial photos are from the 1950's -1960's. These are all black
and white photos: single band tiff. The newer set of aerial photos are
color images from 2005-2007.
The region
I'd like to better understand the way cat values are assigned to
centroids when using v.centroids. I came across a problem when I created
a new vector and digitized boundaries (v.digit -n) . Before beginning
to digitize, I added some columns to the attribute table within v.digit,
so that on
Thanks for the suggestions. Some additional comments below:
Benjamin Ducke wrote:
GRASS modules that create area type features should already be generating
centroids and adding categories to them automatically, shouldn't they?
As far as I am aware, e.g., v.in.ogr does this, so we are talking
I'm trying to become a registered user for the GRASS wiki. I never get
the confirmation email, and as a result I cannot edit. Is there some
additional procedure other than signing in?
Thanks,
Micha
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I've posted a new page on the wiki [1] entitled Digitizing Area
Features. It's targeted at new GRASS users, migrating from other
non-topological software.
I'd appreciate any comments from more experienced users as to
correctness, completeness, or clarity.
Thanks,
Micha
[1]
Hello:
Zahid Parvez wrote:
dear grass user,
I am new in grass using
windows native GRASS GIS 6.3.0.4 and i
am having problem to digitize a map. I
will be very gratefull if you could help
us.
Problem
A model map is as example
for my problem.
Ø
My first
ambrish dhaka wrote:
Hi! all,
I wish to perform r.mapcalc algebra for an area bound by certain
polygons in a vector file. How to do this?
Easiest would probably be to use a raster MASK:
1- convert the vector ("polygon" ) to a raster with v.to.rast
2- define this new raster as a mask with
mingumg wrote:
Hi,
I'm new in grass. I'm trying to import a dxf file to grass using v.in.dxf,
but I don't know how to see the text data (entity type TEXT, specificly the
text under the group code 1).
To the best of my knowledge, v.in.dxf does not import any attribute
information.
--
Micha
peter.lo...@gmx.de wrote:
hi,
I just got stuck with a seemingly simple task:
Let's assume vector layer A holds bunch of boundaries (for example, some
non-overlapping circles) without categories, while vector layer B contains
points/centroids which have categories AND attributes (Soil type,
Hi Moritz:
Thanks for the corrections.
--
Micha
Moritz Lennert wrote:
You can do this with v.patch, *provided* that both vectors have
equivalent attribute table columns.
If you can use the append flag (-a) you don't need to have matching
tables. Just v.patch -a input=LayerA
Markus Metz wrote:
Markus Neteler wrote:
On Thu, Apr 9, 2009 at 10:38 AM, Hamish hamis...@yahoo.com wrote:
Markus Metz:
Maybe use v.out.ogr -c?
yup, that's it. I'd focused on the shapefile example in the man page
and totally missed the blinking red letters at the top:
Hello Eric:
hardinej wrote:
Hi everyone,
Thanks in advance.
I'm trying to extract intersection points. I have a shoreline I extracted
using r.contour and many lines that cross the shoreline that are the output
of v.distance.
I want the intersection points so I'm patching the shoreline and
Offenthaler Ivo wrote:
What would you suggest as the most convenient way to update a small (60 points) vector map? E.g. a map's attribute
pollution_level for a given point-ID (attribute sitecode) has to be updated, based on some
plain text output (columns sitecode and pollution level) of
o create
your raster surfaces based on the integer attributes.
--
Micha
Any help are welcome.
milton
brazil=toronto
2009/5/18 Micha Silver mi...@arava.co.il
Offenthaler Ivo wrote:
What
would you suggest as the most convenient way to update a small (60
points) v
Hello Milton
Roger's answer was, as always, both complete and to the point.
As a further exercise, I took a small region of 54 cells with
floating point values, and using the feature=area option to r.to.vect
I created a vector map of polygons. It produced over 36 polygons.
Most will
maven apache wrote:
Hi:
I followed the doc from the web resrouce:
https://svn.wald.intevation.org/svn/pywps/tags/pywps-3.1.0/pywps/Grass.py
And I think what we are doing is similar to theirs,so I thought
the confignation of grass maybe correct for us.
Is there some special
maven apache wrote:
I don't recall the start of your thread:
Are you saying that you need to be able to handle any data that
clients throw at you in *any* CRS?
How will you know the CRS of the client's maps? (Many data formats
do not require full metadata with
and mapset after a user quested is
completed.
Just delete the whole location directory.
Thanks!
Regards,
Micha
2009/6/14 Micha Silver mi...@arava.co.il mailto:mi...@arava.co.il
maven apache wrote:
I think you should start this way, and
work out the string of GRASS
maven apache wrote:
Hi:
When I use the commond r.out.gdal to export a raster map to tiff, I
often got a black blank image, however when I use the commond
r.out.tiff I can get a viewable tiff image.
I want to know it is caused by my commond of something else?
Hi Maven Apache:
I had the 6.3
I installed GRASS on WinXP using the setup file of the new version of
WinGRASS from:
http://grass.osgeo.org/grass64/binary/mswindows/native/
When starting GRASS, as long as I point to an existing GRASS GISDBASE it
works fine. But if I try to set up a new GISDBASE, new location and
mapset
Colin Nielsen wrote:
A new version of the native WinGrass installer (not OSGeo4W or Cygwin)
has been posted on the GRASS download page.
This release is based on GRASS-6.4.0RC5 (and comes with shiny new
icons) but the wxpython GUI still does not include vector digitizing
(wxvdigit) or 3d
maven apache wrote:
can the grass calculate the area of different color for a image?
I have a tiff, and I have seen five color in it,I wonder I can
calculate the area for each color with grass?
Did you check out r.stats -a ?
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Hamish wrote:
Micha wrote:
I installed GRASS on WinXP using the
setup file of the new version of WinGRASS from:
http://grass.osgeo.org/grass64/binary/mswindows/native/
When starting GRASS, as long as I point to an existing
GRASS GISDBASE it works fine. But if I try to set up a
with r.composite.
2009/6/17 Micha Silver mi...@arava.co.il
maven apache wrote:
can the grass calculate the area of different
color for a image?
I have a tiff, and I have seen five color in it,I wonder I can
calculate the area for each color with grass?
Did you check out
Moritz Lennert wrote:
On 17/06/09 14:06, maven apache wrote:
I got a.green a.red a.blue and a.alpha four raster,then follow the
advise from this list I composite the three map g b r to a new
raster:outss
then I run the commond r.stats -a input=ou...@permanent
mailto:input=ou...@permanent
Dwight Needels wrote:
On Jun 18, 2009, at 3:15 PM, Markus GRASS wrote:
Dangles shorter than thresh are removed sequentially until no dangles
remain. No dangles will remain if thresh 0.
PS: I hope you have now the world's cleanest hiking trails:-)
Thanks; I think I could have swept them
maven apache wrote:
This is a vector layer transfered from a raster and its general info
can be seen as follows:
|
| Projection: Universe Transverse Mercator (zone 0)
|
maven apache wrote:
I am using 6.3,my tiff info:
---
Coordinate System is:
PROJCS[WGS 84 / UTM zone 20S,
GEOGCS[WGS 84,
DATUM[WGS_1984,
SPHEROID[WGS 84,6378137,298.2572235630016,
AUTHORITY[EPSG,7030]],
maven apache wrote:
Thanks Micha for his help!
Following his advise, I install the qgis,and the grass plugin and
create new location(epsg4326),and reproj my vector map to this
proj,then export it to kml successfully,however when add the kml to
googlearth I found the layer doesnot match the
Koen Hufkens wrote:
Hi list,
I'm looking for a tutorial on classifying landsat images with GRASS.
I can't seem to find anything on the web. Some pointers would be nice.
One of the first places I check for ideas on image classification is
posts from the California Soil Resource Lab , i.e.:
xavier garcia acosta wrote:
Hello everybody,
I'm working with cadastre information and I've got the next problem.
I've the polygons that represent the plots of the houses but without
any attribute. I've also the points with the attributes of the
previous polygons. That I would like to do
Thanks, Michael. That's great news.
What do you make of the 20 m./30 m. vertical/horizontal accuracy statement?
Isn't SRTM supposed to be around 15 m. vertical and 10 m. horizontal
(even tho' it's 90 m. resolution)?
Regards,
Micha
Michael Barton wrote:
See the following announcement. NASA
Nikos Alexandris wrote:
Hamish:
...
*every* single GIS I have seen which does on-the-fly reprojection has
had major problems which can present itself in a way which is not
obvious to the user (typically due to mixed datums).
Then the user happily goes along doing their work,
On Tue, 28 Jul 2009 11:24:19 -0700 (PDT)
daljeet sachdev...@yahoo.com wrote:
//d.vect Ind_rain_orig
//The Ind_rain_orig looks like this - when the region is set to
vector of Kerala
//g.region vect=ker_rain_v
http://n2.nabble.com/file/n3345107/Ind_rain_orig_reg_ker.png
But when
How can I avoid the problem of strings of single cells when creating
basins with r.watershed? I think this is referred to as ladders.
Here's [1] an image showing what I mean.
In my example, the purple colored catchment has two tails of width 1
cell. One tail separates between the light green
to improve the catchment raster from r.watershed.
Thanks for putting me on the right track,
Micha
cheers
milton
2009/8/3 Micha Silver mi...@arava.co.il
Milton Cezar Ribeiro wrote:
Hi Micha,
May be with *r.neighbors *combined with /interspersion/ method you
GRASS 6.4 RC4 which, I believe contains your newer watershed
speedup. However size of the region and resolution were such that I had
to use the -m option.
Regards,
Micha
Markus M
Micha Silver wrote:
Milton Cezar Ribeiro wrote:
Hi Micha,
Make a test. If you run a 3x3 or 5x5 filter and get
Markus Metz wrote:
Micha Silver wrote:
Markus Metz wrote:
These single-cell strings in basins, did you get them with SFD or
MFD mode? If MFD mode, what convergence factor did you use?
My watershed delineation was done with r.watershed, not r.terraflow,
so IIUC it's SFD. I didn't see any
Nikos Alexandris wrote:
On Tue, 2009-08-04 at 19:33 -0400, Milton Cezar Ribeiro wrote:
Hi Nikos.
Thanks for the reply.
Yes, location is included on .grassrc6.
$ cat .grassrc6
GISDBASE: C:/Mymapset
LOCATION_NAME: newLocation
MAPSET: PERMANENT
GRASS_GUI: tcltk
Any other
Felix Schalck wrote:
Hi,
Aside my previous - more complete - mail, here is one quick question:
Is it possible to create an alpha-to-black color table in GRASS, which
could than be assigned to an elevation shadings (created via
r.relief.shaded) layer in order to get a transparent background on
Markus Metz wrote:
r.watershed in 6.5+ can do MFD which reduces these single-cell strings
substantially. I would recommend MFD over SFD for anything with 30m
resolution or higher, not much gained for 90m or coarser. Results are
generally more accurate with MFD for high resolution (= 30m)
ambrish dhaka wrote:
Hello! ALL,
I need to learn the important way of working with the data having
different projection system for a single location. Usually the case is
between long lat and UTM projections. I set the region first with
g.region and then try to import vector data which is in
Ravinder Singh Bhalla wrote:
Hi Ambrish,
I'd suggest you use Q-GIS for the display of the maps with different
projections. It happily reads GRASS rasters and vectors. It also has a
neat plugin to convert from on projection to another.
But you need to be aware that QGIS does NOT re-project
ambrish dhaka wrote:
I have the following Long lat and UTM values from the converters.
Can you explain what you mean by converters?
24.5N -2711052
41E-702655
47N -5209532
84E -271930
As you probably know, the two lon values above are in widely separated
UTM zones. 41E is in zone
Hi Daljeet
daljeet wrote:
Hi Micha,
I could create isohyetal lines using the suggested steps:
... clipped...
Following are the doubts/questions
1. I saw the details of the raster created from v.surf.rst
r.info rainraster
zmin_data=0.00, zmax_data=141.322000
kapo coulibaly wrote:
Hi Ambrish,
I found that what works for me is to create two different locations,
one with Lat-Long coordinate definition and one with UTM. Then use
r.proj or v.proj to import from your Lat-Long to your UTM location.
That way they line up perfectly because GRASS will
Tim Holland wrote:
Well, d.barscale in GRASS seems to give you two choices for scale bar (bar
vs. line): http://grass.itc.it/grass64/manuals/html64_user/d.barscale.html
but that still isn't too many...
The QGIS print window has at least a few parameters you can adjust for the
barscale (at
Roger André wrote:
Hi GRASS list,
I've imported a shapefile of country polygons and am trying to use
v.clean properly to clean the topology. Here is what I have done so
far:
456 v.in.ogr dsn=unep_coastlines.shp -o type=boundary out=unep_countries
461 v.clean unep_countries
Bob Byer wrote:
All,
I work extensively in the state of Delaware and the mapping
information that they provide is based on ESRI ID 102257 with an ESRI
WKT Name of NAD_1983_HARN_StatePlane_Delaware_FIPS_0700. As a new
user of GRASS, what would be the best way to import that data?
Raffaele Morelli wrote:
Hi you all,
how can I transform a dxf (imported with v.in.dxf) layer in utm32
coordinates system? I am currently doing some trials with v.transform
with no success.
Is the dxf in some coordinate system?
If yes, then make a location based on that CRS, import
Carbonari, Katie (IS) wrote:
Hello. I have a netcdf file that I'm visualizing in GRASS. I first
convert the parameters to GeoTiffs (using gdal_translate) and then
incorporate into GRASS via r.in.gdal. Each file has 48 time steps (one
per hour for 2 days). Is there any way to show the
maven apache wrote:
does the grass support windows 7 system?
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Can you try running GRASS in XP Mode and report back how it works?
Thanks,
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Paolo Cavallini wrote:
Hamish ha scritto:
fyi 'g.region zoom=' starts at the current region settings*,
so maybe try:
g.region rast=foo
g.region zoom=foo
* this lets you zoom in on individual clusters within the map
There must be something wrong here:
g.region
Kim Besson wrote:
Hello All
I'm a new user of GRASS and I have downloaded grass (6.4.0~rc5-2) for
i386 architecture from http://packages.ubuntu.com/karmic/grass.
as far as I can see GRASS by command line is working. Now the problem
seems to be wxpython
Check if you have installed the
On 01/27/2010 10:11 AM, incanus wrote:
anyone discovered how to do this correctly? I've tried several ways, but my
ubuntu 9.10 don't see gdal 1.6
Are you using the ubuntugis repository from ppa?
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On 01/27/2010 11:27 AM, incanus wrote:
if you mean http://ppa.launchpad.net/qgis/ubuntu, yes
Is there any else?
Not that one. There's an UbuntuGIS repo
https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable/?field.series_filter=
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of these various terrain/hydrological modules?
Rich
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Rich Shepard wrote:
On Wed, 10 Feb 2010, Micha Silver wrote:
A quick tip regarding r.water.outlet (you may have noticed this already)
The module creates a new raster covering the whole analysis region with
two possible values: 1 for all cells draining into the outlet, and 0
everywhere else
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Richard Chirgwin wrote:
Thanks everybody, I will just send one response!
First - Micha, thank you! I didn't even know there was another box to
check.
I'd like to raise the question (again) regarding displaying vector
labels in wxGUI and the need to check the attr checkbox in the
Optional
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Andrew Lewin wrote:
Dear All,
I am having some difficulty viewing an attribute table from a vector
file that is connected to a sqlite database table.
Here is the terminal snippet of my commands with errors:
GRASS 6.4.0RC5 (SantaMonicaBayMM):~ v.in.db driver=sqlite
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that rectangular polygon to the target region . Next run
g.region vect=tar_region
And the region in your target location should match where the raster
wants to be.
- Now try your r.proj comand
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to reproject that rectangular polygon to the target region . Next run
g.region vect=tar_region
And the region in your target location should match where the raster
wants to be.
- Now try your r.proj comand
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-8441
Skype: andrew.lewin99
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that represents a count of the number of points from the
BonesVect that fall in that cell.
Regards,
Micha
Thanks again
Gary
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On 28/03/2010 14:09, Jeremy G wrote:
Micha,
2010/3/28 Micha Silver mi...@arava.co.il
Where exactly is the /media/Docs/geodata directory located on your
machine/network?
You have to be the *owner* of the directory containing the Location and
Mapset
On 03/28/2010 03:04 PM, Jeremy G wrote:
2010/3/28 Micha Silver mi...@arava.co.il mailto:mi...@arava.co.il
Probably checking:
ls -al /media/Docs
Here is the result (I didn't paste the whole directory information) :
jer...@jeremy:~$ ls -al /media/Docs
drwxrwx--- 1 root plugdev
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for any
suggestions,
Randy
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at 1:54 PM, Micha Silver mi...@arava.co.il
mailto:mi...@arava.co.il wrote:
Nathaniel Iwuchukwu wrote:
Also, when i convert from vector to raster, i don't see
anything on the new raster map. its all blank. what should i
do. thanks
I guess that would explain why
the satellite rasters look like, with your training polygons, and
the resulting roads. Then perhaps someone will be able to suggest how to
get more complete results.
2010/4/1 Micha Silver mi...@arava.co.il mailto:mi...@arava.co.il
On 04/01/2010 01:11 AM, Nathaniel Iwuchukwu wrote:
Thanks
=roads
Cheers,
Micha
2010/4/1 Micha Silver mi...@arava.co.il mailto:mi...@arava.co.il
On 04/01/2010 02:52 PM, Nathaniel Iwuchukwu wrote:
i created 11 polygons from different portions of the road.
So if I understand correctly, the procedure is working, but you're
not getting
...@gmail.com wrote:
Thanks Micha,
I was thinking of running the r.mapcalc command but not sure of
the exact argument to use.
is there a command i can run to show me the values of the colors
on the map?
Thanks
Nathaniel
On Fri, Apr 2, 2010 at 8:27 AM, Micha Silver mi
resolution of 20.
Using GRASS 6.4.0RC5 on Ubuntu 9.10
Mine data is small.
Thanks in advance.
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http://www.surfaces.co.il/
Arava Development Co. +972-52-3665918
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Nathaniel Iwuchukwu wrote:
So far, i have been able to extra road from a satellite imagery but it
has broken lines and it also captured buildings. these are the steps i
followed to arrive at this stage:
Just curious. If you're interested in a vector road layer, why not use
openstreetmaps?
.
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Micha Silver
Arava Development Co. +972-52-3665918
http://www.surfaces.co.il
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