English: Length of one degree (black), minute (blue) and second (red) of latitude and longitude in metric (upper half) and imperial (lower half) units at a given latitude in WGS84 by CMG Lee. For comparison, dotted lines denote corresponding lengths assuming a spherical Earth of IUGG mean radius (R1 = 6,371.0088 km). For example, the green arrows show that Donetsk (green circle) at 48°N has a Δlong of 74.63 km/deg, 1.244 km/arcmin, 20.73 m/arcsec etc and a Δlat of 111.2 km/deg, 1.853 km/arcmin, 30.89 m/arcsec etc. The background bitmap is from http://commons.wikimedia.org/wiki/File:Equirectangular_with_Tissot%27s_Indicatrices_of_Distortion.svg .
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Short title
WGS84 angle to distance conversion
Image title
Length of one degree (black), minute (blue) and second (red) of latitude and longitude in metric (upper half) and imperial (lower half) units at a given latitude in WGS84 by CMG Lee. For comparison, dotted lines denote corresponding lengths assuming a spherical Earth. For example, the green arrows show that Donetsk (green circle) at 48°N has a Δlong of 74.63 km/deg, 12.44 km/arcmin, 20.73 m/arcsec etc and a Δlat of 111.2 km/deg, 18.53 km/arcmin, 30.89 m/arcsec etc. The background bitmap is from http://commons.wikimedia.org/wiki/File:Equirectangular_with_Tissot%27s_Indicatrices_of_Distortion.svg .