I have a group of vector files that I intend to convert to "DXF" format. But after the conversion, only contour lines(white lines in the red polygon) are not displayed in Autocad. I read some related Q&As in this site but could not get a satisfactory answer. Does the problem stem from the elevation data or intersection with polygon or something different?
Regards
Okay, based on the comments above. I think your first problem is that your white lines are gaps between the polygons.
I would start by establishing what the subject is. I.E. is it lines on a polygon or a polygon with loads of other polygons.
I would try to convert polygons to lines using Vector>Geometry tools>polygons to lines.
If this works and you are no presented with a shapefile of the line, with no red shading, then all is good.
Its a simple matter of conversion to dxf. you can try right click the file then save as, and select dxf. this SHOULD work. However, as i am used to using Grass, as the other method used to not work, i would follow this Video...it is really simple.
I defined the datum of contour lines by myself. However it was not defined by CAD programme. So I set the datum same with other vector files and offset the contours. Then I converted to dxf again. As a result, the problem has been solved
