QGIS is out for this.
I run QGIS and that would not be the proper way to do it. The ogr2ogr
path is the best way unless you want to act on each single entry in
QGIS. The edge files can get to be real huge.
I use QGIS for putting in updates and changes to my local shapefiles.
BTW, I have been in the process of downloading the WHOLE enchilada from
census.gov this weekend. I just believe in self abuse.
73 from 807,
Richard, N6NKO
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
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