pseudo satellite positioning system

[Schmidt]

At 09:41 AM 10/31/96 +0100, you wrote:
>Hi there,
>
>I am looking for a device that can be used as a real world digitizer. 
>It needs a higher accuracy then a GPS can offer, but less than a 
>total station. I am thinking of a system that consists of  3 
>transmitters and a receiver, connected to a pen computer. It has to 
>operate on an area of approx. 200 x 200 m. ( an archaeological site). 
>Does anybody know if such a device is used in for instance civil 
>engineering?
>
>
>
>
>Ronald Wiemer
>R.O.B. / Archis
>Kerkstraat 1
>NL 3811 CV Amersfoort
>The Netherlands
>
>Tel: ++ 31 33 4634233
>Fax: ++ 31 33 4653235
>
>

I have seen advertisements for a system called PENMAP sold by Condor Earth
Technologies, 21663 Brian Lane, Sonora, CA. 95370. Telephone 209-532-0361

Jim Schmidt
avenues at sonnet.com 
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