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Jennifer,<br>
<br>
I wouldn't throw those data out. They may be better than you can get
anywhere else except a GPS. I would note the source as DigitalGlobe via
Google Earth at full-zoom, or something to that effect. That will at
least let someone replicate what you did. In the calculator, use
Gazetteer as the source, with WGS84 as the datum.<br>
<br>
John<br>
<br>
<blockquote type="cite" class="cite" cite="">Hi John,<br>
<br>
The satellite maps say copyright 2005 Digital Globe. When I go to
their website,
<a href="http://www.digitalglobe.com/product/index.shtml"
eudora="autourl">http://www.digitalglobe.com/product/index.shtml</a><br>
<br>
there is a variety of data listed for each of their types of imagery
such
as imagery accuracy, etc.<br>
<br>
I realize you are in the field and won't be able to look at this until
you return. My guess is that the coordinates i have taken from
these satellite images will not be able to have the error calculated
using the error calculator and thus i suppose will have to be thrown
out
and redone using some other data source? <br>
<br>
Good luck with your field work and hope to hear from you when you
return.<br>
<br>
Jen<br>
<br>
At 03:15 PM 10/20/2005, John Wieczorek wrote:<br>
<blockquote type="cite" class="cite" cite="">Hi Jennifer,<br>
<br>
I'm in the field now and don't have the on line time to check on this,
but what we're really after is the underlying data source, so that
Google
Earth isn't an appropriate source. I don't remember if the interface
tells you what data are showing. That's what you need to look for.
Let me know what you find.<br>
<br>
John<br>
<br>
<br>
At 09:49 AM 20 10 2005, Jennifer Mui wrote:<br>
<blockquote type="cite" class="cite" cite="">Hi John<br>
<br>
I have used Google Earth to obtain coordinates for some features that I
could not find good coordinates for but are obvious from satellite
imagery, such as the Great Pyramid in Egypt. From what I can tell,
Google Earth uses WGS 84 datum.<br>
<br>
"<font size="2">As Google Earth currently uses WGS84 datum projection,
GIS files using NAD83 projection are not supported by Google Earth.
"<br>
from:<br>
</font>
<a
href="http://earth.google.com/support/bin/answer.py?answer=21332&query=datum&topic=0&type=f"
eudora="autourl">http://earth.google.com/support/bin/answer.py?answer=21332&query=datum&topic=0&type=f</a>
<br>
<br>
My problem is that when using the error calculator, I am not sure what
to
put as the coordinate source. <br>
<br>
<br>
Any help would be great,<br>
Thanks<br>
Jen Mui </blockquote>
</blockquote>
</blockquote>
<br>
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<pre class="moz-signature" cols="72">--
Carol L. Spencer, Ph.D.
Museum of Vertebrate Zoology
3101 Valley Life Sciences Building
University of California
Berkeley, CA 94720 USA
510-643-1620
fax 510-643-8238
<a class="moz-txt-link-abbreviated" href="mailto:atrox@berkeley.edu">atrox@berkeley.edu</a>
<a class="moz-txt-link-freetext" href="http://herpnet.org">http://herpnet.org</a>
</pre>
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