Problems with lat and lon and time zones

[binsurf]

Does anyone know if there are issues in Flight Sim that relate to the capturing of incorrect data for the Latitude and Longitude of an aircraft across time zones during flight? I've made a program that measures the distance flown every second by capturing the lat and lon of the aircraft. However, when the aircraft crosses certain time zone boundaries, the distance is grossly over calculated. One example is from KBOS to CYYZ. The distance is roughly 400 nm, but the result is upwards between 3000 and 6000 nm. Any suggestions? My distance calculation algorithm has a +-5% margin of error. This is beyond that.

[Pete Dowson]

Does anyone know if there are issues in Flight Sim that relate to the capturing of incorrect data for the Latitude and Longitude of an aircraft across time zones during flight?

I've never heard of that. Are you observing any incorrect Lat/Lon values being read? If your program is reading bad values you should surely be able to detect them?

Maybe there are occasions when FS (or your PC) is doing something whch causes the call to FSUIPC to time out and return an error. If you are not detecting this and taking action to avoid the non-data return, then possibly you are reading (0, 0) as a valid location. No doubt that would be many thousands of miles off course!

Pete