Thanks for the tip of using Inkscape for the SVG to DXF. That worked great. I used…
- Save As > Desktop Cutting Plotter (AutoCAD DXF R14) *.dxf.
- Options: use LWPOLYLINE type of output with a Base Unit of “Inch”.
- All other default settings.
The contours came into SketchUp (Pro) just as lines, quick and easy. Thanks!