osmconvert --all-to-nodes returns same point count as the raw data has According to this question Some OSM tags in polygons and some in points - how to bring them together I used osmconvert --all-to-nodes to extract the central points of all ways and relations. I used a ... ...
If you need to get your shapefile into a CSV to draw those polygons, here is the path that I'd suggest. Since it sounds like you need a custom projection as well as to draw the polygons using points in a CSV (will create them as polygons and use a vertex orderin...