RE: [GRASS-user] Importing ArcASCII raster and associated dbf table?
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
RE: [GRASS-user] Importing ArcASCII raster and associated dbf table?
-Original Message- From: Hamish [mailto:hamis...@yahoo.com] Sent: Tuesday, 10 February 2009 9:34 AM To: grass-user@lists.osgeo.org; Devereux, Jarl M Subject: RE: [GRASS-user] Importing ArcASCII raster and associated dbf table? Jarl wrote: The data is an Australian soils atlas including hydraulic properties in the dbf. this? http://www.daff.gov.au/brs/data-tools/daas-download if not, is there a link to download the dataset? It seems to be a different data set here is a link to the one I'm using you have to register to download it. http://www.toolkit.net.au/Tools/SHPA 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. It is an interesting problem to me. Are you interested in one of the DBF fields, or several/all of them? As a quick guess, I think the answer will be to create 1 map per DB column by some simple script. Hamish The way I was going to use the atlas was to query it with either coordinates to see what soil properties are at that point or overlay other areas of interest to determine how the soils change across the area. I can do this externally to grass by referencing the CAT number outside grass but it isn't very convenient. On a similar situation I was doing this attribute management manually by querying the vector and manually adding a new column and defining the attribute. This makes me think I should be able to have all the table information in the one vector. I could also add the columns individually and then populate them external to grass through excel or something? Regards Jarl 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
[GRASS-user] Importing ArcASCII raster and associated dbf table?
Hi 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 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? The db.* commands seemed to be only vector based 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. my cat values are not consecutive and the .dbf table that accompanied the data doesn't have a cat column it has a consecutive value column instead. How do I go about adding this table to the vector so it correctly matches up value and cat? Thanks in advance Jarl Devereux 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
