altos-mapd: Check nearest portion of tile to launch site
authorKeith Packard <keithp@keithp.com>
Sun, 7 Oct 2018 20:08:30 +0000 (14:08 -0600)
committerKeith Packard <keithp@keithp.com>
Sun, 7 Oct 2018 20:08:30 +0000 (14:08 -0600)
We limit tile queries to those within 17km of a known launch
site. Change the check to look at the portion of the tile nearest each
launch site, instead of only checking the center location of the tile.

Signed-off-by: Keith Packard <keithp@keithp.com>

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