Author Topic: Track/Waypoint elevation shading  (Read 2164 times)

LDWhite68

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Track/Waypoint elevation shading
« on: April 25, 2012, 01:28:04 PM »
I have collected GPS and temperature data together that I want to display. I thought that I could use a Perl script to create a gpx file that would slip the temperature data into the elevation (or some other) tags in the file, and then use track shading to display the temperature data along the track. The main problem that I'm having is I can't figure out how to force the shading to customize for the range of temperatures/elevations that are in the file. It looks like possibly the range is determined from the max/min values of all loaded gpx files, instead of the specific one of interest or even of those files with extent in the current domain. I'm also unclear whether the data will be treated as real/float or if TF only handles them as integers. I have looked in several places for a way to force a particular elevation range, but have only found it for displaying the tiled elevation data instead of track data. Even if I were only working with 'true' elevation data, I would still like to be able to do this (e.g. for a subset region with less topographic range or to ignore bad out-of-range values). It would be nice if similar color variation could also be done for waypoints instead of only for tracks. Am I missing something?

ScottMorris

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Re: Track/Waypoint elevation shading
« Reply #1 on: April 26, 2012, 07:58:39 PM »
Hi,

You're right, the track shading is based on the min/max elevation of all tracks loaded.  Simple solution - hit CTRL-A and then right click to disable them all.  Then turn on only your temperature track.

I do plan to allow manual setting of the ranges for shading, but it's not there yet.

I'm not sure how you would shade waypoints, or what useful effect it might have.  Shade the color of the font for the waypoint text being displayed, perhaps?  I suppose it could be interesting with enough waypoints.  Maybe you can describe more what you want to do with it.

Thanks.
Scott Morris - founder and co-author of TopoFusion
email: smorris@topofusion.com