The most common classical datum found in Serbia (the former Yugoslavia) is the Hermannskogel 1871 Datum with a Latitude of Origin = 48� 16? 15.29? N, and a Longitude of Origin = 33� 57? 41.06? East of Ferro, where Ferro = 17� 39? 46.02? East of Greenwich and azimuth to Hundsheimer is = 107� 31?41.7?. The most common grid found on that datum is the Yugoslavia Reduced Gauss-Krueger Transverse Mercator. The scale factor at origin (mo = 0.9999), the central meridians of the belts (C.M. = 15�, 18�, 21� East of Greenwich) and the False Easting at C.M. = 500 kilometers. About fifty years ago, the Army Map Service transformed Hermannskogel 1871 Datum to the European Datum 1950. However, large data sets still survive on that old datum. I examined the relation between the two datums back in 1997 and I computed new transformations. Twenty two points were used that are common to both datums in the former Yugoslavia and a simple three-parameter shift analysis yielded the following: DX = +770.417 meters, DY = -108.432 meters, DZ = +600.450 meters. The accuracy of this transformation when expressed in terms of actual geodetic coordinates is: Latitude change = � 3.74 meters, Longitude change = � 4.54 meters, and Ellipsoid Height change = � 12.70 meters. On the other hand, a seven-parameter shift analysis yielded the following: DX = +758.53 meters, DY = +259.52 meters, DZ = +542.18 meters, Scale = -6.0X10-6, Z-rotation = +11.29 seconds, Y-rotation = +2.06 seconds, and X-rotation = -5.66 seconds. The accuracy of this transformation when expressed in terms of actual geodetic coordinates is: Latitude change = � 1.07 meters, Longitude change = � 1.44 meters, and Ellipsoid Height change = � 0.64 meters. For example, station Vel Gradiste has the following EU50 coordinates: 45� 09? 17.3501? N, 18� 42? 44.9479? E, 0.0 m. and the following Hermannskogel 1871 coordinates: 45� 09? 14.4675? N, 18� 43? 00.7696? E, 0.0 m. The Yugoslavian Reduced Grid coordinates are: Northing (X) = 5,001,303.81 m., Easting (Y) = 556,359.65 m. This was published in "Photogrammetric Engineering and Remote Sensing" back in 1997 in my regular monthly column on "Grids and Datums." Not everything is on the internet, but most of my stuff is. Clifford J. Mugnier Chief of Geodesy and Associate Director, CENTER FOR GEOINFORMATICS Department of Civil Engineering LOUISIANA STATE UNIVERSITY Baton Rouge, LA 70803 Voice and Facsimile: (225) 578-8536 [Academic] Voice and Facsimile: (225) 578-4474 [Research] ====================================================== http://www.ASPRS.org/resources.html http://www.cee.lsu.edu/facultyStaff/mugnier/index.html ====================================================== Hello, I'm haven't been able to find anything regarding an official projection used by the government, but I would recommend UTM 33N and 34N. If you aren't including the republic of Montenegro, the whole thing would fall into zone 34N. Since Serbia is working on EU membership, the ETRS89 (=WGS84) datum wouldn't be inappropriate. Hope that helps. Regards, Sam Knight Blue Marble Geographics [EMAIL PROTECTED] http://www.bluemarblegeo.com and http://www.beyondgeo.com ----Original Message Follows---- From: "CDR Group" <[EMAIL PROTECTED]> Reply-To: "CDR Group" <[EMAIL PROTECTED]> To: "MapInfo List Server" <[EMAIL PROTECTED]> Subject: MI-L Serbia Date: Fri, 15 Oct 2004 16:15:43 +0100 Hello all Could anyone enlighten me on the appropriate projection for Serbia, please.?? .... and it is late on a Friday afternoon here! CDR Group www.cdrgroup.co.uk www.puredotnet.co.uk Tel: 01433 621 282 Fax: 01433 621 292 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 13748
