Brendan, I have zero on the use of the Polyconic in Bulgaria unless you are diddling with 1:1,000,000 International Map of the World (IMW) stuff. If that is so, then what you have is the standard IMW Lallemond Polyconic. The Russian Verst Maps (1891) were on the Polyhedric Projection at 1:126,000 scale, but other than being in the same screwy projection "family" of aphylactics, there is no similarity to the Polyconic. For info on the Polyhedrics (Polyeder in Dutch and German), see my past columns in PE&RS. I do not know if MapInfo supports that projection. Otherwise, everything I can find in Bulgaria is Gauss-Kruger Transverse Mercator. Four Datums, but all on G-K TM. I have never heard of the Bulgarian 1970 System. Send me some info and maybe I can help you. Clifford J. Mugnier ([EMAIL PROTECTED]) Geodesy, Photogrammetry, & Surveying Department of Civil and Environmental Engineering LOUISIANA STATE UNIVERSITY Baton Rouge, Louisiana 70803 Voice: (225) 388-8536 --------- Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 -------------------------------------------------------- --------------------------- On Monday, 21 February, 2000 11:44 AM, Brendan wrote: > Dear Mr Mugnier, > > I read your mails in the MI user group regarding MI Datums > and have visited > asprs.org and the intimidating (by virtue of volume) > NIMA.mil. > > I am mailing you from Ireland so I trust concerns about > secrecy are > academic, however if you wish I will send you my PGP > public key. > > I am interested in the Bulgarian System 1970 projection > which I believe is > polyconic and secret, data on the older 1950 system and > the 1:25000 scale > map series would also be welcome. > > Any general or specific advice would be most welcome. > > regards Brendan ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
