Hello achim 1- I converted from raster to vector (r.to.vect) r.to.vect -v input=teste01_l...@regional output=vector01 feature=area
Extracting areas... Building topology for vector map <vector01>... Registering primitives... 833 primitives registered 4624 vertices registered Building areas... 334 areas built 163 isles built Attaching islands... Attaching centroids... Number of nodes: 662 Number of primitives: 833 Number of points: 0 Number of lines: 0 Number of boundaries: 499 Number of centroids: 334 Number of areas: 334 Number of isles: 163 r.to.vect complete. 2- When I select a designated area i get this: East: 629238.662505 North: 9331859.599043 Map: vector01 Mapset: Regional Type: Area Sq Meters: 1132124355.009 Hectares: 113212.436 Acres: 279754.021 Sq Miles: 437.1157 Layer: 1 Category: 5 Driver: dbf Database: C:\DWEISdata/Brazil/Regional/dbf/ Table: vector01 Key column: cat cat : 5 label : (CAT IS the value of my previous raster) 3- When i do: v.db.connect map=vecto...@regional table=vector01 driver=sqlite I get the following error: ERROR: Use -o to overwrite existing link for layer <1> THis will mean that it will overwrite existing table right? I tried with -o and I got the error: DBMI-SQLite driver error: Unable to open database: unable to open database file Unable to open database <$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/> by driver <sqlite> Unable open database <$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/> by driver <sqlite> ERROR: Table <vector01> does not exist in database <$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/> So I'm not able to do what you suggest Any other suggestion? 2010/11/16 Achim Kisseler <[email protected]> > Hi, > > you should not loose the information, because the table you create consists > of a column "cat" by default containing the cats. > > Does this do the job? > > Achim > > Am 16.11.2010 09:46, schrieb Luisa Peña: > >> Hi Achim >> Well, the thing is, if I add a table to my vector, I will loose all the >> information that is already available in my vector (since it's a >> conversion from a Classification raster I have a cat value for each >> area). Right? >> >> 2010/11/15 Achim Kisseler <[email protected] >> <mailto:[email protected]>> >> >> >> >> >> Am 15.11.2010 16:41, schrieb Luisa Peña: >> >> In this email, >> >> http://lists.osgeo.org/pipermail/grass-user/2010-November/058644.html, >> you suggested me to use sqlite as database. I'm willing to try >> that. How >> can I do that with a vector created from r.to.vect with categories >> values in cat column >> >> >> Hi Luisa, >> >> first create an sqlite-database, second take the vector file and add >> an table to it >> (http://grass.osgeo.org/gdp/html_grass64/v.db.addtable.html: >> --%<-- >> DESCRIPTION >> v.db.addtable creates and adds a new attribute table to a given >> vector map. It links the table to the specified layer of the vector >> map. If the vector map is not yet linked to any table, new a >> database link is established based on the MAPSET database settings >> (see db.connect). >> --%<--). >> Is that what you are looking for? >> >> Regards, >> Achim >> >> >>
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