[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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