[Xastir] SDTS to shapefile conversion?
Curt, WE7U
archer at eskimo.com
Mon Jan 3 15:27:59 EST 2005
On Mon, 3 Jan 2005, Gerry Creager n5jxs wrote:
> Fort those of you who followed the APRS Sig thread about Tiger
> inaccuracies a couple of weeks or months ago, this is a significant
> deal. I may want to snag the shapefiles; I'll get ahold of the player
> in NYC who was so concerned about the TigerLine files. This should make
> him happier.
>
> One caveat: It is my understanding from our USGS State Mapping
> Coordinator that not all of the SDTS coverages have been appropriately
> reprojected to NAD83.
I think the OGR code as used by Xastir will auto-convert, but you're
saying that for OGR2OGR you'd perhaps have to have it do a datum
translation as well as a file translation, in order to come out with
Shapefiles that were in WGS84 or NAD83, right?
I'm basing my statement about Xastir/OGR doing the auto-translation
on the fact that it does this with Shapefiles just fine, as long as
they have a .prj file with them that OGR can recognize. I've used
state-plane coordinate system NAD27 shapefiles under OGR and it
works.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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