Timeline for Calculating length of Appalachian Trail
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 20, 2017 at 20:59 | comment | added | Angelo.Hannes | @DPSSpatial The 2190 is stated here: appalachiantrail.org/home/explore-the-trail and also here amazon.com/Appalachian-Trail-Data-Daniel-Chazin/dp/1944958002 and my personal copy of The AT Guide also lists 2190 miles. But IIRC The AT Guide uses different data then the ATC | |
| Jul 20, 2017 at 20:20 | comment | added | Inactivated Account | @ziggy have to wonder where the 2190 is coming from vs. the distances postgis is calculating on the linestring...data collection is the issue, I think! | |
| Jul 20, 2017 at 20:16 | comment | added | ziggy | true, well in that case i got 2124 miles | |
| Jul 20, 2017 at 20:10 | history | edited | Inactivated Account | CC BY-SA 3.0 |
added 22 characters in body
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| Jul 20, 2017 at 20:08 | comment | added | Inactivated Account | @ziggy metres (meters?) as per epsg.io/2163 | |
| Jul 20, 2017 at 20:05 | comment | added | ziggy | i got this huge number..3419158.44452333. is 2163 measured in degrees? | |
| Jul 20, 2017 at 20:05 | comment | added | Inactivated Account | @ziggy how did the results compare? | |
| Jul 20, 2017 at 20:04 | comment | added | ziggy | @DPSSpatial I tried your suggestion with 2163 with this query select sum(st_length(st_transform(geom,2163))) from at_centerline | |
| Jul 20, 2017 at 19:32 | comment | added | Inactivated Account | @Angelo.Hannes good stuff! | |
| Jul 20, 2017 at 19:30 | comment | added | Angelo.Hannes | Thanks for your answer, and no worries for my confusion with the colorado state plane. That was entirely my fault. As far as I know the use GPS devices to collect the data every once in a while. However some data is "corrected" via satellite images. I'll try to reach out to someone who created the shape file. | |
| Jul 20, 2017 at 19:18 | history | answered | Inactivated Account | CC BY-SA 3.0 |