Simone Gabbriellini wrote: > Hello List,
Hello Simone, > this is my first attempt with Grass, Have a nice ride with GRASS GIS :-). Invest some time, it'll "payback" multiple times. As a starter, it is advised to warm-up with some stuff over at: <http://grasswiki.osgeo.org/wiki/GRASS_Help#First_Day_Documentation>. First thing you need to do in any case, is to set-up a location based on the spatial reference system of the data you plan to work with. Check some stuff here: <http://grass.osgeo.org/grass64/manuals/helptext.html> and here: <http://grasswiki.osgeo.org/wiki/Importing_data>. > I am trying to visualize administrative boundaries of India... I am trying > to load e00 files that I downloaded from > http://data.geocomm.com/catalog/IN/group109.html So, GRASS GIS has its own vector (and raster) formats. You need to import the data first in GRASS' data base. > Now, I really cannot understand how to import these data. For "e00" files, there is a module called "v.in.e00". The help/manual pages is: http://grass.osgeo.org/grass64/manuals/v.in.e00.html You need to use this module in order to get the data of interest inside GRASS' data base. > I don't understand the coordinates type of these data, thus I do not know > what to specify when Grass starts. I had a quick look. The data are "nailed" in geographic coordinates. The "ESPG" code for the "WGS84" reference system is "4326". You need to define a new grass location based on the "EPSG:4326". There are also other ways to do that, not only the epsg-code. > The error message I have is: > > WARNING: Datum <Not_specified_based_on_Clarke_1866_ellipsoid> not > recognised by GRASS and no parameters found > ERROR: Projection of dataset does not appear to match current location. > > I know this is not much information, but really I have no clue of what > I have to do in order to display these data, so any hint/advice on > best practice about how to proceed will be more than welcome. After importing, set the active region to match the extent of the data (you imported/you want to display, edit, et.c.): "g.region vect=ImportedData" in the command line. > Best regards, > Simone Give it a try, report back if things don't roll. Best, Nikos _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
