From: Brian Davies <brian_j_davies@...>
Hi All
I'm currently experimenting with UI-View with the intention of using the
system on future Raynet events. The biggest problem I have is producing
suitable maps that are accurate enough for the purpose. I need street
level maps that I can zoom out of, by changing to another map, to get the
coverage of the event.
For example in July I am organizing the Raynet coverage of the Big H Cycle
Ride. This starts at Hampton Court and ends at Hove, so it starts in
London crosses Surrey and ends up on the South Sussex Coast, in all 60
miles. I want to monitor the sweep vehicle by plotting every couple of
minutes. The map of the whole area is of fairly small scale. The idea is
to monitor progress on a map of the entire route, but should it be
necessary to locate the vehicle with some accuracy then I would change to a
street level map of the last known position.
All this requires maps of some accuracy. The ones I have at present will
not do, for example travelling 9 miles last evening , my destination put me
on the Northern side of the M25 whereas I was on the Southern side - on the
map my position was around 2 - 3 miles out.
As yet I haven't worked out a method of producing the accuracy needed.
Anyone any ideas?
73
Brian
Hi Brian,
We have used UI on several Raynet events now without problems.
Maps have been generated from both Nav progs (down to steet level)
and from scanned input.
The accuracy is generally quite good with errors only starting to
become noticeable at 1:25000 scale, and some of that is due to
the Selective Availability on the Sats..
I can only suggest that you look at the inf files and verify that
the co-ordinates are correct.
To give you some idea of what can be done the NGR cursor readout in
UI is in very close agreement with the grid lines on a scanned section of
a 1:25000 (2 1/4" to the mile) OS map.
73
Jeff G8HUL
