[Xastir] New capability: 2008 Tiger Shapefile street maps

[William McKeehan]

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?
-- 
William McKeehan
KI4HDU
http://mckeehan.homeip.net


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 <mckeehan at mckeehan.homeip.net> 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
> Xastir at lists.xastir.org
> http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
>
>