I am working on a huge CAD-map that I am supposed to convert into a GIS map. Currently I am trying to convert the symbols used for survey points (see below) into polygons, of which I could calculate a central point as the real representation in GIS.
I got rid of all the unnecessary lines, and wanted to convert the remaining line octagon into a polygon by use of the "Line to Polygon tool", but that does not work, apparently, because every edge is a single line (see below). However the lines appear to be correctly snapped to each others end points.
I tried several workarounds, but nothing really worked. Any ideas?