Changes between Version 2 and Version 3 of Help/Plugin/PicLayer

Timestamp:

2010-10-10T22:47:38+02:00 (15 years ago)

Author:

anonymous

Comment:

--

Help/Plugin/PicLayer

@@ -47 +47 @@
 where b is in degrees, ln ist the natural logarithm and tan ist the tangent.
 The longitude in degrees l is obtained from x via l = x*180/PI.
-The latitude b can be calculated from y by b = 2*arctan(e**y) - 45 (when inverse tangent returns degrees).
+The latitude b can be calculated from y by b = 2*arctan(e power y) - 45 (when inverse tangent returns degrees).
 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.
 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%).