Changes between Version 6 and Version 7 of Help/Plugin/PicLayer

Timestamp:

2010-10-10T23:05:16+02:00 (15 years ago)

Author:

anonymous

Comment:

--

Help/Plugin/PicLayer

@@ -50 +50 @@
 The latitude b can be calculated from y by b = 2*arctan(e!**y) - 45 (when inverse tangent returns degrees).[[BR]]
 When transforming longitude degree differences of image corners to distance, you have to take into account that one degree east-west has different size dependent on latitude.[[BR]]
-At equator 1 degree -> d0 = 111.3 km, at latitude b you get d = d0/cos(b) (only exact for sphere, but deviation from ellipsoid < 0.5%).
+At equator 1 degree -> d0 = 111.2 km, at latitude b you get d = d0/cos(b) (only exact for sphere, but deviation from ellipsoid < 0.5%).