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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am developing a navigation system for the blind.
A particular problem I need to overcome is to determine the exact bearing a user
is facing. For example, a person with normal sight knows which direction s/he is
facing because they are able to use 'line-of-sight' to landmarks. However, a
blind person, cannot use line-of-sight and s/he have no idea in which direction
they are facing. Now, a usual navigation system can plot the shortest path and
offer directions from an origin to a destination. However, until we are able to
determine the direction faced by a user we cannot offer navigation instructions.
I was wondering if anyone has any ideas how I can use GRASS and a GPS attached
to a PDA to determine this 'micro-bearing' data?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for your help.</FONT></DIV>
<DIV><FONT face=Arial size=2>Mike</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<BR>Dr.
Michael Francis Ph.D (Lancaster); M.Sc (Lancaster); M.Sc (London); BA Hons
(CNAA) MBCS MCIT MIHT<BR>Senior Lecturer in Information Systems<BR>Director,
Merseyside Regional Research Laboratory,<BR>Liverpool John Moores
University,<BR>Liverpool,<BR>England</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Telephone 079 600 600 72</FONT></DIV></BODY></HTML>