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| author | Mattias Andrée <m@maandree.se> | 2024-10-22 22:22:41 +0200 |
|---|---|---|
| committer | Mattias Andrée <m@maandree.se> | 2024-10-22 22:22:41 +0200 |
| commit | bb5de3aa2ee118df78f0347cffd4e58f846dc1fb (patch) | |
| tree | b313a20b79d67f35a5e4e05bc9106b22dc17f451 /libtellurian.7 | |
| parent | ... (diff) | |
| download | libtellurian-master.tar.gz libtellurian-master.tar.bz2 libtellurian-master.tar.xz | |
Signed-off-by: Mattias Andrée <m@maandree.se>
Diffstat (limited to 'libtellurian.7')
| -rw-r--r-- | libtellurian.7 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libtellurian.7 b/libtellurian.7 index 0933aa9..ae3dff0 100644 --- a/libtellurian.7 +++ b/libtellurian.7 @@ -95,3 +95,16 @@ radius of curvature for some latitude. See .BR libtellurian.h (0) for a listing of available constants. +.SH NOTES +Users, and developers in particular, shall be aware that +this library uses GPS coordinates which are geocentric. +This means that the latitude is base one the angle from +the centre on the earth. There are a number of other +systems, most famously as a linear function of the +arc length, or more commonly in geodesy, the geodesic +latitude which is the enable between the local normal +from the surface and equatorial plane. Users should +take great care ensure the correct correct system (GPS) +is used, and developers should be careful designing +functions for the GPS coordinate system and be aware +the geodesic formulae usually use geodesic latitudes. |