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2006-09-12 05:26:37 AM
delphi33
We have some GPS data coming back from PDA's. I to extract the data(all
chinese to me) and obtain a map of the area.
Any help appreciated.
SteveW
 

Steve,
Have a look at:
www.tatukgis.com
More expensive than others, but it does the job!
There are many maps available online free and pay.
After searching through many sources, we ended up paying for the maps.
Trying to match the free sources can cause brain tumors.
I will research the source of the maps we used and get back to you if needed.
Regards,
Scott.
"stevew" <XXXX@XXXXX.COM>writes news:XXXX@XXXXX.COM...

Steve,
For the digital maps, we used:
www.mapmart.com/
100k resolution
You may have to get a higher resolution depending on the level of detail
needed. We used 100k for water ways in the Gulf. If you need street level
you may need a higher res.
Regards,
Scott.
"Scott Martin" <XXXX@XXXXX.COM>writes news:XXXX@XXXXX.COM...

stevew writes:
of these:
1) NMEA 0183 www.kh-gps.de/nmea-faq.htm - if you're reading data
as it is streamed from the GPS receiver.
2) ESRI ShapeFile (shp/dbf/shx)
3) MapInfo files (mid/mif/tab)
...If you're reading the output files from a GPS application that runs
on the PDA.
TatukGIS reads and writes ShapeFiles and MapInfo files well. It also
reads NMEA 0183 IIRC, but NMEA 0183 is easy to write a parser for so it
may not be worth the expense.
4) Some proprietary application format defined by the PDA software. In
this case, you will have to either reverse engineer the data or get help
from the vendor.
Once you get the data out of the PDA, you will need to start worrying
about coordinate systems, map projections and datums - especially if
you need to overlay maps from different sources. TatukGIS can help make
those transformations for you, although in my experience its accuracy
is pretty bad.
--
 

Thanks for the info guys.
I have been on holiday and the PDA's have arrived so should be starting next
week.
"Johannes Bjerregaard" <jozzb@hotmail>writes