[Xastir] Terraserver Images

[Gerry Creager N5JXS]

Overall, the official USGS schedule is every 10 years.  Some areas with 
little urban change/land-use change get ignored to allow reflying faster 
moving areas more frequently.  Texas, for instance, is on a 5-year 
schedule.  USGS helps with the costs, but doesn't contribute the 
majority of the money anymore.

Also, remember it can take over a year after the pix are flown to color- 
and edge-match them, register and rectify them and get them ready for 
release on the web.

gerry

Jason Hitesman wrote:
> Bob Nielsen wrote:
> 
>> I noticed that some areas were updated to color images a few years 
>> ago, including my location.  I was (barely) able to pick out the shape 
>> of my house.  Nothing anywhere close to live updates, however.
> 
> 
> Not sure how xastir grabs images but Terraserver now has several sets of 
> images for most areas.  I think xastir just uses the USGS images which I 
> believe are supposed to be reshot every 10 years...but how quickly they 
> make it to Terraserver is another matter.
> 
> If you go to terraserver.com directly they show the date image was taken.
> 
> I did notice the new color images they have are VERY up to date. Looking 
> at my area I can clearly see a new mall which construction started on 
> less than a year ago (and which is only just this month starting to 
> open) as well as a new school that was built within the past year.  The 
> color image lists its date as 4/19/2004.
> 
> The USGS image for my area is dated 6/16/1996 - and a LOT of stuff isn't 
>  there that was here when I moved here in 99 :D
> 
> Would be cool if someone could put together a page where you give an 
> address then it grabs as many sat images as it can find going back in 
> time and showed the progression as a video....
> 
> Oh yeah....and what's a cloud, I think I remember those from when I 
> lived in Ohio :D
> 
> ----
> Jason Hitesman
> N8INJ
> 
> 
> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843