Timeline for bicycle / bike map road grade markers - semi-automated?
Current License: CC BY-SA 3.0
8 events
when toggle format | what | by | license | comment | |
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Apr 14, 2014 at 8:36 | answer | added | Alexandre Neto | timeline score: 2 | |
Jan 1, 2014 at 19:10 | answer | added | Tom Grundy | timeline score: 0 | |
Dec 31, 2013 at 23:53 | comment | added | Tom Grundy | added UPDATE at the bottom of the post, incorporating ideas from whuber and dklassen | |
Dec 31, 2013 at 23:52 | history | edited | Tom Grundy | CC BY-SA 3.0 |
added 548 characters in body; edited tags
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Dec 31, 2013 at 22:55 | comment | added | dklassen | Tom, you could use the Slope GRID and interpolate the different line segments - this will give you a slope value for each line segment - then you can categorize them! You also could use the original DEM and interpolate the line segements on this - getting the start and end elevations - then you can calculate the direction and average elevation change. | |
Dec 31, 2013 at 22:38 | history | tweeted | twitter.com/#!/StackGIS/status/418149298338279424 | ||
Dec 31, 2013 at 22:03 | comment | added | whuber | I would like to suggest that you back up a step and rethink the workflow, because a boolean combination of a slope raster and the roads just won't work: it will fail to distinguish roads that are perfectly level (and run along contours) from those that go straight up and down hill. Ultimately you will have to compute the directions in which every road segment heads. How that is done depends on the software you intend to use: please tag your question or edit it to provide that information. | |
Dec 31, 2013 at 21:44 | history | asked | Tom Grundy | CC BY-SA 3.0 |