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Justin,<br>
<br>
If you have access to the actual sensor/camera physics/support data,
one way to do the initial geo-positioning would be to create a
sensor model and then orthorectify the image to the terrain. You
could do this with the ossim library. <br>
<br>
See: <a class="moz-txt-link-freetext" href="http://trac.osgeo.org/ossim/">http://trac.osgeo.org/ossim/</a><br>
<br>
The tricky part would be making the sensor model if one does not
exist already. If you can't do that Kyle's suggestion might be
best, perhaps using gdalwarp. <br>
<br>
Take care,<br>
Dave<br>
<br>
<br>
On 11/08/2010 02:26 PM, Kyle Shannon wrote:
<blockquote
cite="mid:AANLkTim7GtRGRbsD6O=rcpXGTV83DF_91Zoz2sCGDB6z@mail.gmail.com"
type="cite"><font face="courier new,monospace">Justin,<br>
I would look at GDAL, <a moz-do-not-send="true"
href="http://gdal.org" target="_blank">gdal.org</a>. There
are a few things that may be of use for you. There are several
command line utilities that may be of use and good a good api
for C/C++, python and other languages. The documentation is
good too. Read through the website and see if it works for you.<br>
<br>
kss<br clear="all">
</font><br>
# ============================<br>
Kyle Shannon<br>
Physical Science Technician<br>
RMRS Fire Sciences Lab<br>
Fire, Fuels & Smoke - RWU 4405<br>
5775 Highway 10 W.<br>
Missoula, MT 59808<br>
(406)829-6954<br>
<a moz-do-not-send="true" href="mailto:kshannon@fs.fed.us"
target="_blank">kshannon@fs.fed.us</a><br>
# ============================<br>
<br>
<br>
<div class="gmail_quote">On Mon, Nov 8, 2010 at 10:32 AM, Justin
Close <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:justinclose@comcast.net" target="_blank">justinclose@comcast.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
Hello all. I am new to the list and I am looking for some
guidance and<br>
pointers.<br>
<br>
I am a computer science student working on a project involving<br>
manipulation of a large number of images. The images are
aerial shots<br>
of the cities at night (taken from space, actually). We are
taking the<br>
RAW camera images, saving to TIFF, using the date/time stamp
of the<br>
image to generally locate what/where the image is of, then
manually<br>
morphing the image to scale/rotate/position it accurately to
reality.<br>
Reality in this case is Google Earth; the images will
eventually be<br>
served up as Google Earth layers.<br>
<br>
The CS part of this is how to automate this process. We
wanted to embed<br>
the lat/long information we got back into the image, and
GeoTIFF seems<br>
to be the perfect format for this. Low and behold, it can
also contain<br>
morphing information too, it seems. And there are all these
nifty tools<br>
out there that can do this manipulation, apparently. But for
me, who is<br>
just starting out with it all, it seems a bit overwhelming; I
don't know<br>
where to start in order to find out what tools I should be
using.<br>
Libgeotiff seems like it has a bunch of things that we (it is
a team<br>
project) should be using; we don't want to reinvent the wheel
(not<br>
completely anyway - a bit of learning by doing can be good,
though).<br>
<br>
So far the images have just been processed within GE itself,
using its<br>
Image overlay features. But that is tedious and awkward.
First step is<br>
perhaps a better manual tool that can achieve the same results
(an image<br>
that is rotated and scaled to fit GE accurately). A next step
is to try<br>
and get those manual operations automated so that a large
number of<br>
images can be done quickly, without intervention.<br>
<br>
For the tagging (approximate lat/long) I was thinking of
something to<br>
read the TIFF tag data, interface with the database that will
yield the<br>
lat/long of the image, and then writing that back to the TIFF
(now that<br>
I know something about GeoTIFF, probably as a GeoTIFF now
instead of<br>
TIFF). It looks like listgeo/geotifcp are the tools I would
want to be<br>
using for doing that.<br>
<br>
So, I am just asking for some guidance from folks who have
used these<br>
tools and could comment on what might work well for what I am
looking<br>
for. If you want more details, let me know.<br>
<br>
Thanks,<br>
<font color="#888888">Justin<br>
<br>
<br>
<br>
</font><br>
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