Changes between Version 5 and Version 6 of Help/Plugin/PicLayer
- Timestamp:
- 2010-10-10T23:01:51+02:00 (15 years ago)
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Help/Plugin/PicLayer
v5 v6 50 50 The latitude b can be calculated from y by b = 2*arctan(e!**y) - 45 (when inverse tangent returns degrees).[[BR]] 51 51 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]] 52 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%). 52 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%). 53 53 54 54