29 Apr '15, 11pm

A Simple And Inexpensive GPS Navigation Device

A Simple And Inexpensive GPS Navigation Device

There are plenty of GPS navigation units on the market today, but it’s always fun to build something yourself. That’s what [middelbeek] did with his $25 GPS device . He managed to find a few good deals on electronics components online, including and Arduino Uno, a GPS module, and a TFT display. In order to get the map images on the device, [middelbeek] has to go through a manual process. First he has to download a GEOTIFF of the area he wants mapped. A GEOTIFF is a metadata standard that allows georeferencing information to be embedded into a TIFF image file. [middelbeek] then has to convert the GEOTIFF into an 8-bit BMP image file. The BMP images get stored on an SD card along with a .dat file that describes the boundaries of each BMP. The .dat file was also manually created. The Arduino loads this data and displays the correct map onto the 320×240 TFT display. [middelbee...

Full article: http://hackaday.com/2015/04/29/a-simple-and-inexpensive-g...

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