New answers tagged elevation
1
GDAL doesn't have a ready-made utility for this that I know of. You would probably have to script something.
However, for filling sinks, GRASS has the r.fill.dir and r.terraflow functions. SAGA and some other FOSS raster GIS packages also have sink filling functions too.
Spikes pose a different problem and you'll need to consider a median filter and/or ...
6
As a geologist, I often use this technique to make geological cross section in pure Python. I presented a complete solution in Python: Using vector and raster layers in a geological perspective, without GIS software (in French)
I present here a summary in English:
to show you how to extract the elevation values of a DEM
how to treat these values
If ...
1
From the comment earlier
Bike hike has the ability to parse gpx from a web location and renders this on the google map but also creates Elevation and Gradient profiles:
Miles and Kilometers supported
Other options:
Add Course-point
Drag edit mode
Reverse the Route
Map Size
This is an Example of a trail up Snowdon Mountain in North Wales.
...
2
You can do this with ArcGIS 10.1.
run GPX to Features tool (converts GPX files to points features class)
run Points to Line tool (converts points FC to line FC)
run 3D Analyst tool: Stack Profile (creates a table of elevation AND with the optional output graph, provides the profile as a graph)
So you'll need ArcMap 10.1 basic /w 3D Analyst.
4
For a Python approach, try gpxplot available from code.google.com. The script is available here and the online interface is located here.
Try using GPS Visualizer. The profile tool looks like what you may be interested in.
Or, Maplorer: View GPX file on map + elevation
1
I will suppose your points and lines have Z values, so you would need to convert them to a DEM, probably points are masspoints and lines being hard or soft lines (breaks). After that you will need a second DEM with the proposed elevations.
Having both DEMS
1. The original DEM
2. The proposed elevation DEM
You can now do raster calculations to determine ...
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