I am working on a project mapping Rockingham castle for a event help there in August and am mapping the layout and camping area. I'm looking at taking over from the person previously performing this task as he is busy this year.
He has done all the work AutoCAD, whereas I work in GIS, mainly ArcGIS. However my license at home will expire in the future so am trying to start using QGIS and I am on a mac.
I acquired OS Mastermap vector data of the area and sent it to him as a dwg file exported from ArcGIS shapefile.
My main query is how does he align the un-georeferenced dwg file he has used to create the layout to the OSMM and then assign OSGB coordinate system to the dwg layout file and export so that I can import it back into QGIS or ArcGIS? He works in AutoCAD mainly but has Civil 3D at his work.