Thanks for the reply!
Its maps over pipe-systems, its 2D Polylines w different linetypes and colors to differentiate the different pipes depending on theme.
The goal is for the program or script is to pull out objects in the viewport thats only visible; model-space has for example 100 different objects, while the viewport (section of the map) only has 10 different in that specific area, so i cant pull out the legend from model-space, it needs to be whats visible in the viewport only (legend per map).
I attached a screenshot (due to that i do not own the data; the customer does, i turned off all background info, just showing a section of the piping network). In this picture, some different pipes are visible; sewers, tunnel, water-supply etc., which is located on different layers (linetype, color and lineweight is all sorted on a layer basis). The objects over manholes, ponds etc. is also located from its own block, with its own name. 1 type of point-feature, is one specific block. The blocks is stored in the DWG of the piping map, and XREF'd into the LAYOUT drawing.
Let me know if something was still unclear.
