Dear everyone

Does any one know whether a speific Geographic Coordiante System is required
when creating a spatial reference using the Cassini-Soldner projection?

I am currently in the process of creating a spaital projection in ArcGIS for
a scan of an old six-inch map. I have the coordinates for the centre of
origin but I'm not sure about which Geographic Coordinate System I should be
using. I believe the Israeli Cassini Soldner used the Clarke 80 Modified but
I don't know if the same applied to the OS.

All this is being done to avoid going near copyrighted OS data. I believe if
I geo-reference my maps using OS digital data I am then tied into OS
regulations as to what I could do with my geo-referenced out of copyright
maps at a later date.

Kind regards

Timothy Langner