Hi I am completely new to GIS and am trying to develop a system which reads from navigational data sources in NMEA 0183 format. I have read about NMEA format but I could not figure out what is the meaning of each type of nmea sentence. I am not asking how to parse or meaning of fields in each sentence type as they are defined in IEC 61162.
GLL,RMC,GSA,GGA are some type of nmea sentences.
For example you have navigation device. What I understand is depending on type/model/brand of device it only supplies one type of sentence. GSA is containing location, GGA is also containing same location but in different format.Why one device provides different type of sentences as they are conveying same information in different format ?
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GLL,RMC,GSA,GGA are some type of nmea sentences.
For example you have navigation device. What I understand is depending on type/model/brand of device it only supplies one type of sentence. GSA is containing location, GGA is also containing same location but in different format.Why one device provides different type of sentences as they are conveying same information in different format ?
أكثر...