ps: on the subject of GPS receivers, has anyone had a chance to play
with the Track Stick? think: thumbdrive with built in GPS and
accelerometer .
http://www.trackstick.com/index.html
The Track Stick records its own location, time, date, speed,
heading and altitude at preset intervals. With over 1Mb of memory,
it can store months of travel information. All recorded history can
be outputted to the following formats:
RTF (Detailed text file with .html map links)
XLS (Microsoft Excel spread sheets)
HTML (Webpage with graphics and maps)
KML (Proprietary Google Earth file)
(already wrote them trying to find out where i can get one - if i
hear back i'll fwd it to the list)
____________
dennis crowley
founder, dodgeball.com
+ [EMAIL PROTECTED]
+ 917-301-2028
____________
On Mar 23, 2006, at 8:55 PM, Marc Pfister wrote:
Ian wrote:
I'm thinking that if I can get post process out of a gps, why pay for
accuracy in the device? I don't need real-time processing as I'm
collecting
a lot of point data in urban areas (which compounds the real time
problem).
The more I think about it, the less sense it makes to purchase an
expensive
device if it's possible to get the data out in a dgps-able format, as
it
can
always be 'fixed in the mix.'
Thoughts?
The antennas can make a huge difference, especially in urban areas
where
multipath is problematic. You're in NYC, right?
One thing to consider is the time and cost of post-processing. You
need
software and someone has to sit there, download the base station data,
and run it every time you collect points. With a DGPS unit you get
your
accuracy when you collect the points and you don't have to fuss
with it
later.
Again, knowing your budget and your accuracy needs would help out a
ton
in giving you specific advice.
Marc
Marc Pfister
Geospatial Data Manager
ENPLAN
[EMAIL PROTECTED]
530/221-0440 x108
530/221-6963 Fax
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