On 9/8/02 7:38 AM, "Gary Lawrence Murphy"  wrote:
>   J> ...  If you want a region of the globe mapped out to a very
>   J> high resolution (e.g. 1-meter), they can scan the area with
>   J> aircraft LIDAR and add it to the database, thereby making that
>   J> region zoomable to the resolution of the database for that
>   J> area.  
> 
> Can you give us an example of an application where 1-m resolution
> would be worth the considerable expense?Planning battle tactics; for this reason, the intelligence press
reports, spy satellites have had 1-meter resolution for many years.Finding an individual vehicle in a city might occasionally be possible
with 1-m images and might occasionally also be worth the money.For small areas you have legitimate access to, it's probably cheaper
to go there with a digital camera and a GPS and take some snapshots
from ground level.  Aerial photos might be cheaper for large areas,
areas where you're not allowed --- or, perhaps, physically able --- to
go, and cases where you don't have time to send a ground guy around
the whole area.-- 
       Kragen Sitaker     
Edsger Wybe Dijkstra died in August of 2002.  The world has lost a great
man.  See http://advogato.org/person/raph/diary.html?start=252 and
http://www.kode-fu.com/geek/2002_08_04_archive.shtml for details.
