[pct-l] PCT Google Trail Map WITH Mileages!

[Postholer]

Postholer Google maps now have mileages for the PCT, AT, GET and JMT!!! 
Click the 'Toggle Distance' near the top on the map page, then move your 
mouse over the blue trail trace and mileages will appear. Try it with the 
PCT:

http://postholer.com/gmap/gmap.php?trail_id=1

About the new mileage markers
At higher zoom levels with the map scale greater than 2 miles the markers 
are spaced a couple miles apart. As you zoom in the markers are spaced about 
1/4 mile apart. This provides a great level of mileage detail at any zoom 
level.

This feature can be demanding on older, slower computers thus the 'Toggle 
Distances' link for the ability to turn it off or on.

Accuracy
The overall length of the calculated trail is 2,644 miles. The data used for 
the mileage and trace is obtained from the USFS pct.kml. As a quality 
control check I've compared the calculated mileage with the PCT Data Book to 
see just how different they are. Overall, it's pretty impressive. The data 
is very close with only one big, glaringly obvious descrepancy.

Between Big Bear and Agua Dulce, the calculated mileage loses about 15 miles 
compared to the data book. That's alot! I haven't compared the guidebook and 
kml trace intensively for the error, yet. Maybe it's a frog detour, flooding 
or fire during mapping that is the culprit.

Here are a few comparisons of the mileage so you can get a feel of how close 
it really is.

Segment                                   Data Book / Postholer Map
Cascade Locks(I-84) to Snoqualmie (I-90)      246.7 / 247.3
Castle Crags(I-5) to Crater Lake (Hwy62)      323.9 / 326.4
Kennedy Mdw to Toulomne Mdw                   239.9 / 247.1
Mexico to Pine to Palms (Hwy 74)              151.3 / 151.3

Have fun!
-postholer

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Maps : http://Postholer.Com/gmap