On 28-Jun-08, at 11:37 AM, jtd wrote: > Also by fixing two points accurately on the periphery by non gps > means,
how is this done? I am told that in America there are markers everywhere giving reference points. The only one in India I have seen is at St Thomas Mount where they started the survey of India. > you could get a deviation figure and correct your readings. > You will have to take the correction every few hrs as ionospheric > delays vary with sun activity. I tried marking the main fountain in Ooty - walked around it 3 times and marked the waypoints. They were all over the place. I was using a garmin device and it was showing accuracy of 30-35 metres on that day. > -- regards Kenneth Gonsalves Associate, NRC-FOSS [EMAIL PROTECTED] http://nrcfosshelpline.in/code/ -- http://mm.glug-bom.org/mailman/listinfo/linuxers
