I am lost by various coordinate systems. This problem may be simple for you, but I still have no idea. A point P which WGS84 coordinate is (a, b, c). a, b, c represents longitude, latitude, altitude, respectively. The coordinates of the Q point relative to the P point in the Cartesian coordinate system are (x, y, z). My question is, how to find the WGS84 coordinates of Q point? Is there a formula or a third-party library?
For example, a gnss device record a few line data, likes
1571729100.288,$GPGGA,07,3020.13221706(latitude),N,12118.46433560(longitude),E,4,38,0.4,5.8393,M,11.4922(altitude),M,02,0249*6D 1571729100.288,$GPGGA,07,3020.13221706,N,12118.46433560,E,4,38,0.4,5.8393,M,11.4922,M,02,0249*6D 1571729100.488,$GNVTG,108.936,T,114.767,M,40.42729,N,74.87134,K,D*3B 1571729100.503,$GPGGA,072500.40,3020.13148649,N,12118.46679048,E,4,37,0.5,5.8416,M,11.4923,M,02,0249*6B 1571729100.704,$GNVTG,108.941,T,114.773,M,40.50145,N,75.00867,K,D*30 1571729100.704,$GPGGA,0760,3020.13075439,N,12118.46924982,E,4,37,0.5,5.8253,M,11.4924,M,01,0249*68 1571729100.905,$GNVTG,109.067,T,114.898,M,40.49335,N,74.99368,K,D*3E
a point P which WGS84 coordinate is ( 12118.46433560, 3020.13221706, 11.4922), a point Q relative to P is (3, 4, 5) in Cartesian coordinate, unit in meter. Other words, the distance between P and Q is sqrt(3*3+4*4+5*5) meters. I just want to know the Q coordinate in WGS84