How to import a DXF to blender 2.8 correctly? I want to build a indoor map in web, and what I have is only a Autocad dwg file .
My proposal is as follows :
1 in AutoCAD , I explode all objects ,Save dwg file as dxf file
2 Import dxf file in blender
3 convert all curve to mesh
4 export the mesh as glb file
5 import the glb file and render in threejs     

here is my questions ,any suggestions is appreciate.
1. my dxf is  
after import dxf in blender 2.8,it looks as follows


why so many unnecessary line/curves ? 
how to remove those ?


it seems lots of lines is in one curve ,
when I select on line ,the blender  hilight  many lines/curves .
how to split it one to one ? (I explode all objects in AutoCAD)
here is my work around:

CAD to .dxf - > .dxf to inksacpe - > inksacpe to .svg > .svg to blender

make sure the scale is correct when import/export