As GPS receiver modules have become increasingly affordable over the last few years, it's only natural that experimenters can find various uses for them with the help of an Arduino. One useful example has been created by Instructables user "JeonLab" who demonstrates how to calculate the distance between two points as measured with the GPS receiver.
Normally the calculations involved to make this happen would require some very accurate floating-point arithmetic, however methods that use more "large number" arithmetic have been used instead which also provide accurate results. With this project as a framework, you can create all sorts of navigational tools, make more accurate distance calculations in tracking devices and more.
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