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Posted by Jean H. on August 20, 2007, 12:28 pm
Any reason to offset them for privacy, or security,
> etc., would be laughable!!!

Well, if each image has a random offset, it makes it a real pain for
anyone that want to copy and re-reference the images.
...

Jean

Posted by dold on August 20, 2007, 2:24 pm
> FWIW, Google Earth is notorius for being off from known positions, and
> the amount varies from location to location. USAPhotoMaps is another
> application (free) that uses aerial photography, but it is black and
> white, and generally older images than Google. However, I have found it
> to be much more accurate.. I think the URL is www.jdmcox.com.

jdmcox has no data. It fetches from TerraServer, which is probably no
better or worse than other mapping data. In my area, the main highway is
off by about 250 feet, and gradually narrows to being correct as it gets
near town. Near a friend's house, the street is shifted about 150 feet
from one side of the intersection to the other.

I see this in TerraServer, Streets and Trips, and Street Atlas, but not
Google Earth or Google Maps.

At one location in San Jose, CA, the topo, BW and color photos are off by
500 feet from each other.

I typically find that Google Earth is as close as I can discern with the
granularity of the photo. but that is also true of TerraServer in most
places.

The big problem with Terraserver is that the underlying USGS topo maps are
horribly out of date in many areas of the country. My aerial photo is from
1993, the topo map from 1974. Google Earth is September 2005, and very
accurate.

--
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5

Posted by Jack Erbes on August 20, 2007, 7:53 am
Karen Wheless wrote:
> How can I take the latitude/longitude provided by the Garmin StreetPilot
> III and plug it into Google maps to find the same location in the USA?
>
> For example, what do I plug into google maps when my StreetPilot III reads:
> N 32 49.230
> W 115 07.061

If you put that on one line like this, N 32 49.230 W 115 07.061, and
enter it into google maps for a search, it will find a location for you.
It found a place north of I-8 between El Centro, CA and Yuma, AZ.

On the find result, it changed the location from degrees and decimal
minutes to degrees, minutes, and seconds and it changed the north to a
positive value and west to a negative value. Like this:

+32° 49' 13.80", -115° 7' 3.66"

I think google will process about any lat/long format that is logical.

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)

Posted by _Pnina Gersten_ on August 21, 2007, 11:41 am
On Mon, 20 Aug 2007 07:53:08 -0400, Jack Erbes wrote:
> I think google will process about any lat/long format that is logical.

Wikimedia will provide a dozen maps

http://tools.wikimedia.de/~magnus/geo/geohack.php?params=32_49_13.80_N_115_07_03.66_W

May I ask what you have buried at this interesting spot?

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