I am trying to import a USGS DEM. The USGS DEMs come in two file formats: ArcGRID and GridFloat. Does anyone know how to transform these files so they can be imported into Civil3D? I tried SDTS2DEM and it's not working. Is there any other program I can purchase that will translate these file formats into DEMs Civil3D can read?
That should be a small .HDR file that you can drop into notepad to see something like this:
Along with a large binary .FLT file. If this is the case (and your byteorder is LSBFIRST) then MapWorks Surfaces will convert it to an ASCII Grid that Civil3D can reference, point file, import it, etc. If your byteorder is not LSBFIRST then we can do a quick revision.
you can download it in arcgrid format, and then use the.ADF file that is ususally named as w001....adf (the one without the "x" in its file name). if you change your folder view settings to DETAILS, this ADF file would be the last but one.
yes, first create a new blank surface, then add DEM Files under the surface definition in prospector. you need to know what the coordinate system of the ADF file , and you should have a coordinate system set up for your drawing in which you are doing this. if your arcgrid is from usgs seamless, the vertical will be in meters, but you can landxnl out and then landxml into a fresh drawing to convert it to feet.
Access a broad range of knowledge to help get the most out of your products and services.