thanks Hamish, The data is an Australian soils atlas including hydraulic properties in the dbf.
From the accompanying documentation "Spatial data are available as ArcASCII format raster files. The associated database is a binary file in dBase or dbf format. The projection information is in ArcGIS format." "This data set consists of nine sets of data files each containing the following: aas_*.asc An ArcASCII file containing a raster of the soil landscape index. aas_*.dbf A dBase file of soil properties linked to the soil landscape index. aas_*.prj A file containing projection information in the ArcGIS format." I don't know what arcviews capabilities are, so I'm not sure how it would handle the data. However it seems like I should be able to link the database in grass to the vector map I created. The .dbf has the following columns the first column is (int) second (varchar(12) and the rest are all integers or floating pt : VALUE , MAP_UNIT , DATASUPT, SOLDEPTH, SOLPAWHC, A_THICK, A_KSAT, A_KS_ERR, A_SAT, A_FCP, A_WP, A_PAWHC, A_WR_UNR, B_PERCNT, B_THICK, B_KSAT, B_KS_ERR, B_SAT, B_FCP, B_WP, B_PAWHC, B_WR_UNR () The dbf column "Value" corresponds to the CAT number of the vector map I created. The DBF contains additional "value" codes since not all the soils are present in the area I'm looking at. So "cat" 3 matches to "value" 3 etc. V.db.connect may be the right tool however I don't know how to drive it. All the tutorials I found were for old grass versions and seemed to assume I knew how to handle databases. I'm now using the native windows grass 6.3 Kindest regards Jarl -----Original Message----- From: Hamish [mailto:hamis...@yahoo.com] Sent: Friday, 6 February 2009 9:37 AM To: grass-user@lists.osgeo.org; Devereux, Jarl M Subject: Re: [GRASS-user] Importing ArcASCII raster and associated dbf table? Jarl Devereux wrote: > I'm new to grass and I'm trying to import an ArcASCII raster file with > an associated dbf table into a cygwin grass 6.2. > I have been using r.in.gdal to import the raster without issue (r.in.arc might work too) > however handling the attribute data is still a mystery to me. > > Can I connect a raster to a dbf table or add the attributes as layers? what is the form of the fields in the database? If simply category:label you can use the rules= option of the r.category module in GRASS 6.3+ to attach them. For GRASS 6.2 you would have to create the cats/ file by hand. (it's just a text file) see http://grass.osgeo.org/grass64/manuals/html64_user/r.category.html There is the possibility that you could pipe the dbf into r.category with the "dbview" utility. > The db.* commands seemed to be only vector based right, > so I converted the raster to an area vector using the raster values as > the cat. I am not sure of the steps to copy or attach the arc dbf > table. v.db.connect? > my cat values are not consecutive that's ok > and the .dbf table that accompanied the data doesn't have a "cat" > column it has a consecutive "value" column instead. so is the Arc map categorical or floating point real numbers? what does it represent? is the DBF file like 0.0-500m: Lowlands 500.0-1000.0m Midlands 1000.0-3000.0m Highlands or......? > How do I go about adding this table to the vector so it correctly > matches up "value" and "cat"? need more info. Hamish ********************************DISCLAIMER**************************** The information contained in the above e-mail message or messages (which includes any attachments) is confidential and may be legally privileged. It is intended only for the use of the person or entity to which it is addressed. If you are not the addressee any form of disclosure, copying, modification, distribution or any action taken or omitted in reliance on the information is unauthorised. Opinions contained in the message(s) do not necessarily reflect the opinions of the Queensland Government and its authorities. If you received this communication in error, please notify the sender immediately and delete it from your computer system network. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user