Create interior borders from objects
The description in the title is what I would like to achieve, with an additional note of a slight offset (40u in drawing). I attached a snip and a dwg of the three step process that I would like to fully automate.
The current approach that I am considering developing is to select all pick-points with a fixed distance for blocks and a nearest for lines, to capture the coordinates of existing objects in the entire drawing.
The next step I can conceive is to make points in a circle (R=x, may require tailoring per information contained in dwg projects) around each of the objects on a layer except for the area (and area around?) selected pick-points.
This is where I don't know. Assuming there is not trouble in developing the previous parts, the last step would be to connect the nearby points to one another for an interior border.
Basic gameplan: take entire drawing, make personal exterior point radii or offset, then group & connect points into perimeters.
PS. if you looked into the dwg and are wondering why I made no mention of adding rectangles, that would be the ultimate end goal here. To properly identify empty space so I'd be enabled to fill in with various descriptors (ie. tables, charts, data sets, viewports or images.