I've received the results of a drone survey (photogrammetry. Contours have been produced as .dwg and imagery as .ecw. Looking at the outputs they have been mosaiced (so I have 10 of each file type making up the whole area). The files are small in terms of size and I'm wondering what the reason for this might be. I'm unable to contact the surveyors and so thought I would ask the community.
Ideally I'd like to make them into single files which is fine for the .ecws but with the .dwg contours I need to merge the lines on the mosaic edges. Is there a way to merge adjoining lines (using a tolerance or similar) programatically?