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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: [gislist] GPS for capturing street centerline data |
| Date: |
11/14/2003 12:05:00 PM |
| From: |
Dimitri Rotow |
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>
> There is an interesting section on street centerline capture
> methods in this
> report (see link below) on linear referencing systems. See the section on
> creating centerline databases, the study claims that $250 GPS can create a
> centerline with sufficient accuracy for most applications.
>
> http://www.ncgia.ucsb.edu/vital/research/pubs/200204-LRsynthesis.pdf
>
>
Absolutely! Especially in the US where with WAAS-enabled GPS (still under
$250) you can get 2 meter accuracy or better.
This goes for many other applications as well. The above report correctly
notes that now that Selective Availability distortion has been turned off
GPS makes sense in many applications where formerly it did not. For many
types of mapping you can't beat the convenience of plugging a WAAS-enabled
GPS into your laptop and then simply driving, say, the boundaries of your
ranch, the roads in your forest tract, trails, the perimeter of a lake, etc.
and bang! like magic you get really good maps with nearly no manual effort.
Canopy interference is sometimes an issue in dense forest but I here there
are GPS devices that can deal with that.
We have people driving a GIS/laptop/GIS rig in just about every sort of
vehicle imagineable: jeeps, ATVs, mountain bikes, canoes, etc.
Cheers,
Dimitri
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