![]() ![]() ![]() ![]() The most common NMEA sentence of all is the “Recommended Minimum” sentence, which begins with “$GPRMC”. There are over fifty kinds of sentences, yet an interpreter really only needs to handle a few to get the job done. NMEA data is sent as comma-delimited “sentences” which contain information based on the first word of the sentence. #CREATE MY ONWN GPX VIEWER CODE#(The code is stripped of features like multithreading and error handling for brevity.) NET source code from my “GPS.NET Global Positioning SDK” component. To give developers a head start, I chose to use some Visual Studio. Fortunately, the task is simplified thanks to the National Marine Electronics Association which introduced a standard for the industry, now in use by a vast majority of GPS devices. This first part in the series will explore the task of interpreting raw GPS data. What is it that GPS applications need to be good enough to use in a commercial environment, such as in-car navigation? Also, how does the process of interpreting GPS data actually work? In this three-part series, I will cover both topics and give you the skills you need to write a commercial-grade GPS application that works with a majority of GPS devices in the industry today. “I am continually amazed by how little code is required to use atomic clocks in satellites 11,000 miles above my head.” Introduction Download C# and VB.NET source code - 13.25 KB. ![]()
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