[OSM-talk] Jacmel Haiti, DigitalGlobe Imagery, and Road Alignment

[Jeffrey Ollie]

On Tue, Jan 19, 2010 at 1:24 PM, Al Haraka <alharaka at gmail.com> wrote:
>
> I understand we are all busy, but I have some Haiti questions.  The area
> around Jacmel in the south appears to be very messy at the moment, and I am
> only focusing on roads and basic infrastructure.  The roads seem very far
> off, and at times some do not even seem to point to an artifact I can see in
> the imagery.
> http://www.openstreetmap.org/?lat=18.22381&lon=-72.52094&zoom=16&layers=B000FTF
> I have tried cleaning it up using the DigitalGlobe imagery, which I have
> assumed to be the best.  Am I wrong here?  What are other people using and
> what are the current recommendations?  Am I doing a bad job or wasting my
> time aligning the roads if they are this far off?  I realize my use of DG
> may bias me, and I have not taken the time to compare.  That being said, I
> heard it was the most recent and expansive.

Right now there are two sets of images that cover Jacmel, the
DigitalGlobe data from last week and the JAXA/ALOS satellite imagery.
As far as I know, most of or all of the satellite imagery we have
access to now isn't very well georeferenced so you may need to adjust
the image to get a "rough" fit before doing any corrections and/or
traces.

You can see what we know about by checking out the following relation:

http://www.openstreetmap.org/?relation=388801

and this Wiki page:

http://wiki.openstreetmap.org/wiki/WikiProject_Haiti/Imagery_and_data_sources

There is some new data from both Digital Globe and GeoEye being
imported so check the wiki page for updates.

-- 
Jeff Ollie