I have a very large file that I need to reduce in size if possible.
The file started life as a 3d file generated from 'laser scan' From that a 2 d file was generated and then underground pipes were overlay-ed in another layer.
Because the file was generated from a laser scan there millions of entities hence a large file. I would like the drawing to remain looking the same but will never need to change those entities.
Can those millions of entities be merged into something else and act like a background and reduce the file size?
Thanks in advance.