I have tried and tried to make good contour lines from Google Earth or EARTH EXPLORER.USGS.GOV. I can’t seem to get smooth lines or enough lines to be 2 ft lines. Anyone out there working with contour lines? Thanks for your help!
Here is how I have done this.
- Select the 10’ interval contours.
- Use the Sandbox From Contours tool to create a surface
- Create a “stack” of faces that are 2’ apart vertically.
- Intersect the surface and the stack to produce the 2’ contours.
I am a beginner with Sketchup. Could you be a little more specific and
add a few more steps? And where to you get the data to import. I need
an accurate map. Thanks!!!
If you are looking for data that will give you the accuracy required for 2’ contours, I don’t think you are going to find it. For that type of accuracy, you will need a 1:1 site survey or 1"=50’ map from 1500’ stereo aerial photography.produce by an aerial mapping company.
After creating the stack of faces, make them a Group. Move the surface or the stack so that faces of the stack intersect the surface. Intersect Faces>With Model. Delete or move the ‘stack’ group and the surface group. This should only leave the 2’ contours.
Thank you for your kind reply. I will work with this. tnris.org has 5
ft data but I have not been able to import the shp or dem file into
sketchup. Have you used these files?
Sorry, no I haven’t.
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