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| -rw-r--r-- | libtellurian_coarse_distance.3 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libtellurian_coarse_distance.3 b/libtellurian_coarse_distance.3 index 9a3973b..a490ba7 100644 --- a/libtellurian_coarse_distance.3 +++ b/libtellurian_coarse_distance.3 @@ -11,6 +11,8 @@ double libtellurian_coarse_distance(double \fIlatitude1\fP, double \fIlongitude1 double libtellurian_coarse_distance_radians(double \fIlatitude1\fP, double \fIlongitude1\fP, double \fIlatitude2\fP, double \fIlongitude2\fP); + +extern const double libtellurian_coarse_distance_radius; .fi .PP Link with @@ -42,6 +44,17 @@ function except that and .I longitude2 shall be specified in radians. +.PP +The constant variable +.B libtellurian_coarse_distance_radius +is set to the radius used in the model of the +Earth that these functions use. If you want a +better local approximation of distances, you +can multiple the return values by the local radius +(you can use the +.BR libtellurian_sea_level (3) +function) divided by +.BR libtellurian_coarse_distance_radius . .SH RETURN VALUE The |