[Xastir] Re: Tons of Tiger Maps -- can we use them?

[Gerry Creager N5JXS]

Warning!  Warning Will Robinson!  Warning!  Datum error!

300m in NM sounds like a NAD27/NAd83 offset.

gerry

Tom Russo wrote:
> Actually, I have just played around a tiny bit with the tiger maps that
> Jack pointed out.
> 
> By using ogr2ogr on the county files for my county (TGR35001) directly,
> and copying the file "CompleteChain.shp" and its related files elsewhere,
> Xastir displayed it very nicely if I copied the "tgrlk.dbfawk" file and
> changed nothing but the DBFINFO signature.  
> 
> The appropriate change was:
> 
> dbfinfo="MODULE:TLID:SIDE1:SOURCE:FEDIRP:FENAME:FETYPE:FEDIRS:CFCC:FRADDL:TOADDL:FRADDR:TOADDR:FRIADDL:TOIADDL:FRIADDR:TOIADDR:ZIPL:ZIPR:AIANHHFPL:AIANHHFPR:AIHHTLIL:AIHHTLIR:CENSUS1:CENSUS2:STATEL:STATER:COUNTYL:COUNTYR:COUSUBL:COUSUBR:SUBMCDL:SUBMCDR:PLACEL:PLACER:TRACTL:TRACTR:BLOCKL:BLOCKR";
> 
> All the line features in the county showed up exactly the way they would have 
> using the ESRI line files, and I got them all in one zip file.  I get roads,
> streams, railroads, etc. all in one convenient package.  Admittedly it's a
> big package, but whaddya want?
> 
> 'Course, the lines for my neighborhood are way off.  My street is three hundred
> yards or so away from where it's supposed to be, for example.  But that was 
> the case with the tigermaps that show up if I enabled xastir's built-in tiger 
> downloads, so all is well.
> 

-- 
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University	
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