On Thu, Jan 28, 2010 at 8:23 PM, Tony Morris <[email protected]> wrote:
> An aircraft wrecked on a nearby mountain yesterday which I have done a > few of the tracks on OSM. I'd like to know the exact position of the > wreck. Is there imagery available that would help me find out? > > Yes and no. Unclassified, free to net government images are either low-res or not current or both, unless they specifically release images of your event. The non-government sources charge good money for recent images of good to moderate resolution. The resolution of unclassified sat images is not as good as you likely expect. the imagery you may be used to in Google Earth / Google Maps's"Satellite" mode, and JOSM or POTLATCH in the hi-res areas are rarely if ever actual mil-grade sat images but rather civil government or commercial mapping aerial photo series. Unlike Sats, they don't refresh weekly. The Amazing Turk project to find Jim Gray got donations of commercial sat images of the Pacific, we were looking for a 5 - 8 pixel yacht between the clouds. At commercial resolution, it would have to be a big plane directly under the image center to be recognizable to a untrained observer. -- Bill [email protected] [email protected]
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