Hello Mwape You have received great suggestions to try, I will add another one to the list, following Marc's suggestion. If you can identify in the local coordinate system 3, 4 or more landmarks and define the UTM coordinates of the same points, then you can 'rubbersheet' the data in Oasis montaj. I suggest to select 4 points and try to pick them well away from each other, closer to the edge of the mapsheet is best. Then from the 'Coordinates' menu select 'Georeferencing' then 'Define a warp' ; in this GX select the Manual or semi-interactive 'definition Mode' whichever suits you best, and enter the old followed by the new coordinates for each point. 'Define a warp' will build a table that has the old and new coordinates along with an optional projection system. You can then proceed to nicely rubberize the sheet. Once you have the warp defined then you apply the 'Warp' to the old X&Y in the GDB to reproject it to the new coordinate system, and the unit conversion will be also done as part of the reprojection.
Elizabeth -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Marc Pelletier Sent: Tuesday, June 17, 2014 8:38 AM To: Geosoft Oasis montaj and Target Subject: Re: [geonet] Converting Local Coordinates to Projected UTM Coordinates Hello Mwape, If you can identify 2 or 3 landmarks in the old maps, for which you can also obtain UTM coordinates then you can derive a transformation from one system to the other (look up coordinate transformation) and apply it using the "Translate" or "Rotate" tools in the coordinates menu. If you can get a bunch of points then you may get better results if you 'rubbersheet' your data, but I don't think Geosoft provides a tool for that. Marc Pelletier -- Marc Pelletier, P.Geo, Nutana Geophysics Saskatoon, SK tel: (306) 931-6853 cell: (306) 260-6022 On 2014-06-17 3:34 AM, mwape_somanje wrote: > 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 --- 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
