Projection Need Help

[vdharan]

Hi

Iam using MapServer (php mapscript)for Online vehicle tracking system.Iam
also using rosa applet to show online movement of multiple vehicles on the
map.

The application is going to be used in Midddle East. While designing the
system I have used some sample shape files for that region with lat long
projection. Now are trying to get shape files with all road level details.
The map vendor has got maps with WGS84 UTM and WGS84 DLTM(Dubai Local
Transverse Mercator) projections. I dont know which projection to select
for my application. I have used lat long projection and developed the
application.I need to pinpoint the vehicle location based lat & long. If I
go for UTM will that involve changs in the mapping codes?.  Iam from
electronics background, I could not understand much on projection. Please
Help me.

Best Regards,
vdharan