Mwape, It is possible that you may be accessing data in a coordinate projection that was known as the Robertson Projection. This is a unique local projection that is poorly documented. It was a projection popular with the military in some African countries during that period and was also used by some mining companies. It can be very confusing to sort out.
Can you verify that the Y direction is actually N-S and not E-W? Similarly that the X direction is actually E-W and not N-S? If I remember correctly, the Robertson Projection reversed X & Y coordinates in addition to applying a sign reversal (-ve to the north and east). Units are very probably feet but you will need to verify as metres were also used. Suggest you verify the actual grid coordinate orientation using landmarks or road intersections that may appear on the maps and on recent satellite imagery or topographic maps. Good luck, it can be a real challenge to convert to UTM if the original data is in the Robertson Projection. Rob Hearst M.Sc., P.Geo, P.Geoph. Chief Geophysicist Areva Resources Canada Inc. Tel:306-343-4049 Cell: 416-407-6355 Fax:306-343-4632 [email protected] Before printing this e-mail think if it is necessary AREVA group THIS EMAIL COMMUNICATION IS PRIVATE. IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE NOTIFY ME AT THE TELEPHONE NUMBER SHOWN ABOVE OR BY RETURN EMAIL AND DELETE THIS COMMUNICATION AND ANY COPY IMMEDIATELY. DO NOT FORWARD IT. THANK YOU. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of mwape_somanje Sent: Tuesday, June 17, 2014 2:35 AM To: Geosoft Oasis montaj and Target Subject: [geonet] Converting Local Coordinates to Projected UTM Coordinates Dear All Am working on historical exploration plans for a project in Zambia that was worked on by some RST company in the 1950 - 1960s. Unfortunately they were using a local coordinate system that I do not understand for instance the coordinate Y-10 000, X+25 000. I want to georefference the plans in UTM. Is there a way to convert them in Target or any other formula? Someone told me the coordinates are in Loc 29 and in feet. Thanks Mwape --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?fourm=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?fourm=geonet You are currently subscribed to geonet as: [email protected]. To subscribe or unsubscribe from any of our forums, select the User Forum selection on the Geosoft Community page: http://www.geosoft.com/support/community
