Timeline for ECEF coordinates to geodetic coordinates: Where is error in calculation?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Mar 25, 2020 at 0:00 | history | tweeted | twitter.com/StackGIS/status/1242602303254921217 | ||
| Mar 24, 2020 at 9:33 | history | edited | S-Man | CC BY-SA 4.0 |
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| Mar 24, 2020 at 9:32 | comment | added | S-Man | @FSimardGIS Yes, indeed, I missed one digit :D Well, if I would implement one function, I really wouldn't like to exclude such strange cases. Do you have any recommendation for an algorithm: Can be slower, but should be as precise as possible and working for a high height range (near the ground as well as with these heights) :) | |
| Mar 24, 2020 at 9:24 | vote | accept | S-Man | ||
| Mar 23, 2020 at 22:37 | answer | added | Gabriel De Luca | timeline score: 4 | |
| Mar 23, 2020 at 22:08 | comment | added | mkennedy | I would try expanding the e (e2) value at least to 12, if not 15 or 16 digits. | |
| Mar 23, 2020 at 21:45 | comment | added | FSimardGIS | I converted the point you mention and its height gives me 6,005 km. Do you need to calculate points this far up in space? There are quite a few algorithms to convert from ECEF to geodetic lat/lon/height, some are iterative, some are closed-form, but the closed-form ones usually work best if the point is relatively near the ellipsoid surface, not thousands of km up. | |
| Mar 23, 2020 at 21:39 | comment | added | FSimardGIS | Does my calculation only work for h == 0m above ground? Indeed, this conversion only works if the point is on the ellipsoid surface (unless the latitude is 0 or 90°). The line joining the center of the ellipsoid and your point isn't normal to the ellipsoid (=not perpendicular). Hence if you move a point along such a line, the geocentric latitude does not change, but the geodetic latitude does. | |
| Mar 23, 2020 at 21:03 | comment | added | S-Man | @GabrielDeLuca Added an example. | |
| Mar 23, 2020 at 21:03 | history | edited | S-Man | CC BY-SA 4.0 |
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| Mar 23, 2020 at 20:02 | comment | added | Gabriel De Luca | Provided formulas are for points at the ellipsoid surface (and with some little restriction). Do you find errors for points at the ellipsoid surface or for any point in the space? Can you provide one source point coordinates to check the error? | |
| Mar 23, 2020 at 16:50 | review | First posts | |||
| Mar 23, 2020 at 17:29 | |||||
| Mar 23, 2020 at 16:46 | history | asked | S-Man | CC BY-SA 4.0 |