Does Nira support 2D planimetric or 3D contour linework files?

Yes. Nira supports DXF linework as an overlay on 2D orthomosaic maps. Open the asset's 2D viewer to view the overlay. Drawing performance for complex DXF layers has been improved, including on high-resolution screens.

DXF linework is currently displayed over 2D orthomosaics, not in the 3D viewer. DWG and SHP are not listed as supported upload formats. For supported formats and ortho setup, see What file formats does Nira support? and Orthophotos (Orthomosaics).