Perhaps this is already offered/idea, but I can find neither. A very common request that GIS folks get in land management agencies, where there are lots of trails going up and down mountains, is "how far is it? What are the mile posts? Where is the middle? How far to the stream crossing/bridge/water source?". Using 2d interpolation and measurements just doesn't work, where the difference between 2d and 3d line length can be a 1 to 1.5 ratio in some cases (a trail in 2d measure 1 mile, where in fact it is 1.5 miles due to terrain). This is handily summarized in Construct Points on polyline at 3d distance ,Creating point file along line (trail) at regular distances (0.20 miles) using ArcGIS Desktop? - Geo... ,http://www.arcgis.com/home/item.html?id=afb3cb8727c54ceba30c1df1c734f97a ,ArcGIS Toolbox - Create Points on Polylines with ArcPy – Ian Broad , and solved in Arc with http://www.arcgis.com/home/item.html?id=9416fbdf13474923b462567e750417df
With linear referencing I can create true 3d length and use hatching to show those miles, but I can't convert the hatches to a feature class. How To: Create a route with measured values that reflect the 3D length of a line
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