[time-nuts] Speaking of problems with Garmin
Hal Murray
hmurray at megapathdsl.net
Fri Dec 31 07:52:28 UTC 2010
[Context is who makes GPS mapping data.]
> The companies are
> Teleglobe and Navteq
For the US, there is also data from the Census Bureau. It's free.
It's used by the RoadMap project.
http://roadmap.sourceforge.net/
At least in my area, there are a couple of quirks.
Things often don't line up at county boundaries.
Streets in my neighborhood are on a rectangular grid, but they aren't
parallel to N/S or E/W. A street that should be straight is full of wiggles
on the map. It feels like their setup uses a coarse grid aligned N/S and E/W
and there isn't a clean mapping from streets in my area to their grid. (I
have no idea if that really is the problem, but it's the best description I
have come up with.)
I find it useful for playing, especially at the price.
--
These are my opinions, not necessarily my employer's. I hate spam.
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