Approximations, Errors, and Misconceptions in the Use of Map Projections

Table 2

Approximate relationships between discrepancies in actual/reference meteorological parameters and errors in the EDM or TLS resulting distances.

Difference in meteorological parameter	Error in final distance
Temperature: 3°C	4 mm/km
Atmospheric pressure: 3 mb	1 mm/km
Humidity: 30%	<1 mm/km