Garmin nuvi 270 Support Question
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Question posted by jgordonatkins on April 28th, 2015
270 Datum
Current Answers
Answer #1: Posted by sabrie on April 29th, 2015 1:16 AM
A datum is a mathematical model of the Earth that approximates the shape of the
Earth and enables calculations to be carried out in a consistent and accurate manner.
The datum is physically represented by a framework of ground monuments (such as
trig. stations) whose locations have been accurately measured and calculated on this
reference surface. Lines of latitude and longitude on a chart are referenced to a specific
map datum. Every chart has a map datum reference and the 270 can be set to match
most of those commonly used
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