[GRASSLIST:5508] Re: Newcomer Q:Missing libraries on OS X
Michael Barton
michael.barton at asu.edu
Tue Jan 25 01:38:35 EST 2005
Matt,
Well, it would be good if you have some metadata on these files. Where do
they come from? You must have some information about them. Nevertheless, if
you check the Œextend extents...¹ to match map checkbox, both v.in.ogr and
r.in.gdal will automatically do this for you. This way, you don¹t have to
make sure that your region exactly matches the extents and resolution of the
original data.
Michael
On 1/24/05 6:13 PM, "Matt Sakals" <msakals at interchg.ubc.ca> wrote:
> Michael,
> Thank you for your help.
> How do I determine what the extents are? What are the units? How do I know
> what the extents are if I can't open the data?
>
> Matt Sakals, PAg, GIT
> Sustainable Forest Management Laboratory
> University of British Columbia
> mailto:msakals at interchg.ubc.ca
> http://sustain.forestry.ubc.ca/home.html
> 785 Dickens St., Trail, BC, V1R 2B7
> ph. 250.368.3191
> m. 250.231.0951
> __________________________________
> On 24 Jan 2005, at 15:57, Michael Barton wrote:
>
>> Matt,
>>
>> Here are the steps to get your data into GRASS. The learning curve for GRASS
>> is about the same as for ArcView (if you can remember starting from scratch).
>> Knowing ArcView can be helpful and frustrating. You have some idea of what is
>> possible, but the ways to do it are sometimes quite different‹but not always.
>> Now that I¹ve mastered GRASS many things are much easier than in ArcView,
>> some are harder, and others are just different. Hope this helps.
>>
>> Michael
>>
>> Use v.in.ogr (/files/import/vector/various formats using OGR) for the shape
>> files.
>>
>> 1. Make sure you are in a location with the correct projection parameters
>> and extents.
>>
>> 2. Put the path to directory with the files in the ³OGR datasource name² box
>> (path the DIRECTORY only, without the shapefile name).
>>
>> 3. Put the new name of the GRASS vector file you want to create in the ³name
>> of output vector² field
>>
>> 4. Put the name of the shapefile in the ³OGR layer name² box WITHOUT the
>> .shp extension. (You can check the List available layers... checkbox at the
>> bottom to see a list of the names)
>>
>> 5. You will probably have to check the ³Override projection² checkbox
>> because shape files don¹t contain projection information (except with new
>> ArcGIS).
>>
>> 6. You may want to check the ³Extend location extents...² box if the map is
>> bigger than the region you are importing into.
>>
>> This should work.
>>
>> Use r.in.gdal for the ArcView grid file. (/files/import/raster/various
>> formats using gdal).
>>
>> 1. Browse to the hdr.adf file inside the grid folder (not the info folder)
>> to put in the ³Raster file to be imported² box
>>
>> 2. Give a name to the new GRASS raster file you are creating
>>
>> 3. You may have to check the ³Override projections...² checkbox, and may
>> want to check the ³Extend location extents...² checkbox
>>
>> This should import fine.
>>
>> Once you have imported the files go to g.region (/gis/region/manage region)
>> and set the region to match either of your maps. This makes sure that you are
>> looking at the part of the world where you just imported data.
>>
>> Use the GIS manager to display your data.
>>
>> On 1/24/05 3:58 PM, "Matt Sakals" <msakals at interchg.ubc.ca> wrote:
>>
>>
>> Hi,
>> I am still having troubles getting going with GRASS and don't know where to
>> start. As I see it the big downside to continuous improvement is that the
>> support documents are always out of date. This whole venture is extremely
>> humbling as I am an advanced ArcView user, but can't get going here.
>>
>> I am trying to import .shp files and ArcView grids, they are projected
>> according to BC Albers (http://srmwww.gov.bc.ca/gis/bceprojection.html). I am
>> using GRASS 6.0 beta on OSX, would you be able to help me get off the ground?
>>
>> Here is a sample data set of data I would like to work with:
>>
>>
>>
>>
>> Many thanks, it would be great if you can find the time to help me out,
>>
>> Matt Sakals, PAg, GIT
>> Sustainable Forest Management Laboratory
>> University of British Columbia
>> mailto:msakals at interchg.ubc.ca
>> http://sustain.forestry.ubc.ca/home.html
>> 785 Dickens St., Trail, BC, V1R 2B7
>> ph. 250.368.3191
>> m. 250.231.0951
>> __________________________________
>> On 19 Jan 2005, at 22:24, Michael Barton wrote:
>>
>>
>> On 1/19/05 8:30 AM, "Matt Sakals" <msakals at interchange.ubc.ca> wrote:
>>
>>
>> Hi,
>> I am trying to install GRASS, and have used the GRASS complete download for
>> OS X from http://wwwamb.bologna.enea.it/forgrass/download.htm
>> but I don't know if my libraries have been installed; I can't find a
>> grasslib folder on my computer anywhere.
>>
>>
>> Matt,
>>
>> If you have run the install program for the grass libraries in Lorenzo
>> Moretti¹s GRASS complete, they are probably OK. They are located in
>> /usr/local/grasslib. This is a Œhidden¹ directory on a Mac. You can check it
>> by either...
>> 1. Using the terminal program and entering
>> >>cd /usr/local/grasslib
>> >>ls
>>
>> 2. Selecting ŒGo to folder¹ from the ŒGo¹ menu in the finder. Enter /usr
>> and press ŒGo¹
>> You should be able to navigate to /usr/local/grasslib then.
>>
>>
>>
>> I don't know if GRASS is working right or not because I am new, but in the
>> tutorial it crashes when trying to import .shp files.
>>
>>
>> You don¹t say which version of GRASS you are using. But I recommend using
>> GRASS 6.0.0beta1. It is posted on my mirror site for Lorenzo¹s files. I do
>> NOT recommend using 5.7.0 because it is problematic. GRASS 5.4 is fine also,
>> but 6.0 does more and generally does it more better. You should have no
>> trouble importing a *.shp file using v.in.ogr in GRASS 6.0.
>>
>> Hope this helps.
>>
>> Michael
>>
>>
>> ____________________
>> C. Michael Barton, Professor of Anthropology
>> School of Human Evolution and Social Change
>> PO Box 872402
>> Arizona State University
>> Tempe, AZ 85287-2402
>> USA
>>
>> Phone: 480-965-6262
>> Fax: 480-965-7671
>> www: <www.public.asu.edu/~cmbarton>
>>
>>
>>
>>
>>
>>
>> ______________________________
>> Michael Barton, Professor of Anthropology
>> School of Human Evolution and Social Change
>> Arizona State University
>> Tempe, AZ 85287-2402
>> USA
>>
>> voice: 480-965-6262; fax: 480-965-7671
>> www: http://www.public.asu.edu/~cmbarton
>>
>
____________________
C. Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
PO Box 872402
Arizona State University
Tempe, AZ 85287-2402
USA
Phone: 480-965-6262
Fax: 480-965-7671
www: <www.public.asu.edu/~cmbarton>
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