[Qgis-user] Converting X Y Coordinates to Latitude/Longitude

[Nicolas Cadieux]

Hi David,

I’am an archaeologist working in Québec. If you vectorized the map in a local CRS, all you need to do is do a « save as » and change the CRS (coordinate reference system) that is in Longitude Latitude.  If your map is not georefenrenced (that is, you just scanned the map and did not use a CRS, that is more complicated but not impossible.  I usually fixe that do in a CAD but I am sure you can do it in QGIS.  We could talk if you want and I could help you out figured the next steps and steps to avoid this problem (like georefereing the raster map before you start) .Send me an email directly.

You could look at this also.
https://gis.stackexchange.com/questions/136817/qgis-moving-the-layer-all-features-using-vector-affine-transformation

Nicolas

> Le 7 juin 2018 à 20:49, David Hochfelder <dhochfelder at albany.edu> a écrit :
> 
> Hi All,
> 
> I am new to QGIS, so this may be a newbie question easily answered by the more experienced.
> 
> I'm working on a historical GIS project to remap an area of Albany, NY demolished for urban renewal in 1962. I've succeeded in vectorizing a historic map of the area (~1960), but the coordinates are not in lat/long form. I see that there are plugins for converting tables of specific coordinates, but I want to convert the entire map continuously. 
> 
> This area no longer exists--all the buildings and streets were cleared for the Empire State Plaza state capitol complex.
> 
> My end goal is to use the rectified map as a way to geotag historic photographs of particular buildings.
> 
> Is there a way to convert the coordinates in a continuous fashion for the entire region?
> 
> Thanks for your help.
> 
> Dave Hochfelder
> 
> 
> David Hochfelder
> Associate Professor
> History Department
> Social Science 060B
> University at Albany, SUNY
> Albany, NY 12222
> 518-442-5348
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20180607/0e220cad/attachment.html>