[Talk-us] TIGER Data in Wrong Place

[Apollinaris Schoell]

a good reference are the USGS maps. their accuracy is way better compared to
tiger. they are pretty old and usually miss data from the last 10-30 years.
one download location is here http://libremap.org/
You can use any tool which supports geotiff and gpx or shape import to match
some of the points to get the offsets and then do a shift for all features
in josm.
 someone posted about working on geotiff support in Josm. this would be the
easiest way.
another option is to upload the usgs map to any of the WMS servers supported
in Josm.But haven't used it myself and can't comment on the flow






On Wed, May 6, 2009 at 11:08 AM, Andrew Ayre <andy at britishideas.com> wrote:

> Hi! When I load OSM data into my GPS unit using mkgmap for a place in
> the UK then it is accurate. When I load OSM data for Tucson, Arizona
> then it is off by perhaps 100ft.
>
> I would like to make the maps for Tucson usable, so my questions are:
>
>   - how do I tell where this problem begins and ends?
>
>   - how do I fix it?
>
> I don't have the time to manually move everything, so there must be some
> kind of automated solution? Does this problem exist for the whole of the
> US? Is it well understood?
>
> Also if you look at the diagonal (NW-SE) part of the Arizona-Mexico
> border there are streets in the US that appear in Mexico - the whole
> border area appears to be a mess. How do I know what needs to be done to
> fix this? The error looks larger than 100ft.
>
> Andy
>
> --
> Andy
> PGP Key ID: 0xDC1B5864
>
> _______________________________________________
> Talk-us mailing list
> Talk-us at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk-us
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-us/attachments/20090507/9dbccd82/attachment.html>