Commons:Geocoding
Precision: In English, we use . to indicate decimals, not ,
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Revision as of 06:33, 15 March 2013
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==Precision==
==Precision==
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The linear measurement of a longitudinal angle varies according to latitude. If we are aiming to a precision of about 7 m, then it is appropriate to use decimal degrees with 4 decimal places. This is suitable in most cases. For the minute/second format, seconds with 1 decimal place will similarly give precision of about 1,5-3 meters of real earth surface.
+
The linear measurement of a longitudinal angle varies according to latitude. If we are aiming to a precision of about 7 m, then it is appropriate to use decimal degrees with 4 decimal places. This is suitable in most cases. For the minute/second format, seconds with 1 decimal place will similarly give precision of about 1.5-3 meters of real earth surface.
{| class="wikitable"
{| class="wikitable"
|+ '''Length Equivalent of Longitudinal Degree at Selected Latitudes in km'''
|+ '''Length Equivalent of Longitudinal Degree at Selected Latitudes in km'''
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