For what it's worth, this seems to have worked and, before Xastir stopped working for me, it was much quicker using these smaller files.
I used a script file to do the splitting. You can look at the script here: http://mckeehan.homeip.net/aprs/split_by_feature.sh and the supporting features.txt file is there also: http://mckeehan.homeip.net/aprs/features.txt (note that this features.txt file is just for the edges files. The script accepts a list of files as arguments for the "input" files; I used find and xargs to process the downloaded files. If these prove useful to anyone, feel free to use them. -- William McKeehan KI4HDU http://mckeehan.homeip.net On Sun, May 3, 2009 7:23 pm, Tom Russo wrote: > On Sun, May 03, 2009 at 06:44:42PM -0400, we recorded a bogon-computron > collision of the <[email protected]> flavor, containing: >> Yes, that helps a lot! Are there any tools that I could use to graphically >> see >> the data that would match a set of criteria? Without doing the ogr2ogr >> thing, >> then loading the map in Xastir? > > Not really. QGIS, I suppose, but getting QGIS running on your system might > be too much work. If you're lucky, perhaps there's a binary packge for it. > > Oh, yeah, ESRI ArcExplorer should work, too. I can't recall if they've still > got a Java version --- I ran it even on my BSD systems for a while. I still > have a copy of ArcExplorer 9.1 that's the java version. Looks like they still > do have it and are up to version 9.3: > > http://www.esri.com/software/arcexplorer/index1.html > > If push comes to shove, you might be able to run their Windows version under > Wine. > >> On Sun, May 3, 2009 5:12 pm, Tom Russo wrote: >> > On Sun, May 03, 2009 at 03:24:42PM -0400, we recorded a bogon-computron >> > collision of the <[email protected]> flavor, containing: >> >> I'm not knowledgeable enough about shape files to be able to figure out >> what >> >> the "where" clause should be. >> >> >> >> What I would like to do is pull parts of the shape files into their own >> >> file, >> >> so I would have a file (probably still keeping it broken down by >> >> state/county) >> >> for Limited Access Roads, another for secondary roads, etc.; basically, >> the >> >> same breakdown that is done in the dbfawk files. Having each bit of >> >> information in a separate file would let me set the max zoom level for >> each >> >> file and thus prevent Xastir from reading data that I have no intention >> of >> >> displaying at the particular zoom level that I am at. >> >> >> >> So that's my end goal. >> >> >> >> With that in mind, can someone recommend tools that would help me >> understand >> >> how to build appropriate where clauses to break these files out? >> > >> > K. I just did this for Santa Fe County, NM, file >> "tl_2008_35049_edges.shp": >> > >> > Limited access roads: >> > ogr2ogr -where "MTFCC like 'S11%'" SantaFeLTDAroads.shp >> > tl_2008_35049_edges.shp >> > >> > Secondary roads: >> > ogr2ogr -where "MTFCC like 'S12%'" SantaFeSecondaryRoads.shp >> > tl_2008_35049_edges.shp >> > >> > Lather, rinse, repeat for other patterns in the DBFAWK file. >> > >> > "MTFCC='S11'" didn't work, because it turns out that the actual MTFCC >> values >> > *start* with S11, but have suffixes. So -where "MTFCC like 'S11%'" >> matches >> > any record with MTFCC that starts with S11. >> > >> > That should get you on the path. HTH. >> > >> > -- >> > Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/ >> > Tijeras, NM QRPL#1592 K2#398 SOC#236 >> http://kevan.org/brain.cgi?DDTNM >> > In some cultures what I do would be considered normal. >> > -- Ineffective daily affirmation >> > >> > _______________________________________________ >> > Xastir mailing list >> > [email protected] >> > http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir >> > >> > > > -- > Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/ > Tijeras, NM QRPL#1592 K2#398 SOC#236 http://kevan.org/brain.cgi?DDTNM > In some cultures what I do would be considered normal. > -- Ineffective daily affirmation > > > _______________________________________________ Xastir mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
