Custom Query (111 matches)
Results (76 - 78 of 111)
| Ticket | Resolution | Summary | Owner | Reporter |
|---|---|---|---|---|
| #56 | fixed | Sort out handling of geoid | ||
| Description |
Currently the altitude of GPS fixes and hence of cave entrances attached to them doesn't match the altitude of terrain from DEM files very well - the difference seems to be a few 10s of metres. Newer versions of proj have support for geoids, which should solve this: https://trac.osgeo.org/proj/wiki/VerticalDatums I think proj >= 4.8.0 is needed - the release announcement for it includes "Added preliminary vertical datum support". That was released 2012-03-14, so shouldn't be an unreasonable requirement. It would be good to coordinate how vertical datums are handled with therion, but they didn't respond to my email to their list about doing so. |
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| #134 | duplicate | Southern Hemisphere Altitude Reversal? | ||
| Description |
Hi, I'm exporting a .SVX file as .KLM format (to use with other GIS data, created by a friend). All fine, except that a ‘fix’ GPS point (in the.SVX file) with elevation, say, +100m will appear in the .KLM file as -100. Ditto for .SVX files exported as .GPX. That is, the sign of the elevation is flipped. (lats & longs are fine, I think - the original is in UTM, Survex turns them into degrees.) Results in a cave growing out of the earth. I am using this on Kangaroo Island, South Australia, caves with Aven 1.2.27, on an iMac running OS 10.15.7. What have I missed? Cheers, Heiko |
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| #3 | wontfix | Stand Alone Installer for Aven | ||
| Description |
Is it possible to install Aven without the entire Survex package being installed? Just wondering georgiacaver@… |
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