Download the Elevation Map and the Contour files from DroneDeploy. While exporting the files (GeoTIFF, SHP, DXF) ensure that you select the same Map Projection for all of them.
Notes regarding the export parameters
This specific example is based on the Web Mercator Projection (EPSG:3857), but you can use the Map Projection that better works for your needs.
You can export the Elevation Map using GeoTIFF as Data Type, or you can choose to export it using the Raw Elevation Values option if it is available on your plan. Either way, it works!
- Open AutoCAD Civil 3D and start with a blank drawing.
- Type MAPIINSERT in the Command prompt and select the TIFF file you received with your download.
- Set the coordinate system to the appropriate selection for your projects location. Within the Image Correlation, set Image as the Correlation Source for the TIFF image, and specify units as necessary. To finish, select Apply.
- Navigate to the lower bottom left corner to Layout. Allow time for the image to load in this viewer.
- Set Background Transparency (Optional): Select the GeoTIFF, right click, and click on Properties. Next, you’ll want to activate the Image tab and click on Show Image and Background Transparency in order to change the background.
- Type MAPIMPORT in the Command prompt and select Shapefile. Make sure to select .shp in the file selection drop down so you can find the file on your computer. Check that the FileType is readable (ex. ESRI Shapefile, GlobalMapper, QGIS would work).
- It is important to leave the Import Settings as they are with exception of the target projection, which can be changed.
Navigate your cursor to the projection options on the top left of the pop-up. This will bring you to a window that will allow you to set the projection you are using for your project.
Review your inputs. To finish, select OK. Your projection should be applied to the new layer.
- Congratulations! You now have the georeferenced contour layers in AutoCAD Civil 3D.
Updated about a year ago