gps coordinate conversion formula
Converting GPS coordinates to meters?
I have a $GPRMC gps coordinate from a Garmin unit. I am wanting to find the conversions to translate both the latitude and longitude into degrees/ meters. An example of the output is as follows
$GPRMC,030036,A,3335.2189,N,10151.8675,W,000.0,226.0,130208,008.1,E*69
Any help would be appreciated. Also I do not need a website that will convert it for me I need to know the formulas to convert it to to incorporate it in a current program.
Thanks
What i am trying to do is find the relative accuracy of multiple gps units by correlating the CEP (Circular Error Probablility) to each unit to determine its position. The accuracy I am trying to achieve is >1m. With the output of the garmin units being as stated above..how can I convert that to meters. I am primarily concerned with the seconds or in this format the decimal minutes DDMM.MMMM
for give my ignorance
i looked at my garmin, a legend and can’t find the coordinates as you gave,
if i were going to do this long hand, i would look up the formula for departure, and apply the conversion factors to make the changes,
keep in mind that your data is meaningless unless there is a point of reference from which all things are derived.
can you elaborate on what you are doing?
edit 24 hours later
years ago, and i don’t recall how long ago, some mathematicians were drinking coffee working on gps error and they came up with a solution that uses an uplink transponder to the satellite and returns the signal, it has an accuracy of +/- 1mm at the antenna.
i have access to military gps system and i use a garmin. i can’t really discuss the military system, but i can tell you that no two garmin have the exact values for your coordinates. in iraq, and in the united states, the most expensive garmin and the cheapest (i personally use the legend) was so very close as to be not worth worrying about.
even the other brands, like magellan were very accurate. they are all made by the same company and put in different bodies with sales names.
i work with my gps with creation of maps, topographic repesentations and other things….it has been exceptionally useful and i do recommend it
