Re: [Talk-us] Whole-US Garmin Map update - 25-03-2010

[Dave Hansen]

On Sat, 2010-03-27 at 13:55 -0600, Val Kartchner wrote:
 Dave,
 
 I'm a regular contributor to OSM, and a subscriber to the US mailing
 list.
 
 I followed the link to the routable Garmin maps that you have made
 available.  I'm assuming that these are for the US since they are on the
 US mailing list.  However, the contiguous US (CONUS) goes from
 approximately -66.5 to -125.  I didn't see any of the ranges that you
 have that will go this far east in the western hemisphere.  Am I
 mistaken about the extent of CONUS?

So, this isn't the continental US that I'm talking about.  The algorithm
looks like this:

for each garmin image...
does it intersect a state polygon?
If so, add it to the set

The result will be clear if you look here:

http://garmin.na1400.info/routable.php

in the very upper-right corner.  See the few Aleutian islands that cross
180/-180 longitude?

So, the images are named a bit strangely.  The names mean:

This image contains all of the tiles which have middle points
 between these two latitudes.

The end result is that I put the Aleutian island tile next to Maine.
I'm too lazy to fix it at the moment. :)

-- Dave


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[Talk-us] Whole-US Garmin Map update - 25-03-2010

[Dave Hansen]

So, I finally set these up to be fully automated.  If these messages get
sent once a week or so, should I keep them coming to talk-us?  

--

These are based off of Lambertus's work here:

http://garmin.na1400.info/routable.php

I wrote scripts to joined them myself to lessen the impact of doing a
large join on Lambertus's server.  I've also cut them in large longitude
swaths that should fit conveniently on removable media.  

http://daveh.dev.openstreetmap.org/garmin/Lambertus/25-03-2010

There have been some missing tiles from Lambertus's map (the red
rectangles),  I don't see any at the moment, so you may want to update
if you had issues with the last set.

If you buy a new card (especially SDHC), some are FAT16 from the
factory.  I had to reformat it to let me create a 2GB file.

-- Dave


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