Turn on aerial mapping using the GEOMAP command or use the MAPIMPORT command to import a known shape in your area if you have one or can get one from a web site like the USDA Web Soil Survey.Ĥ. If you are confused or want to use the SI UTM projection system, a web search will help you select an appropriate projection.ģ. Search for something that looks right for your area. Click the Select Coordinate System button (or in Civil 3D, select from Zone Categories and Available coordinate systems). Start the ADESETCRDSYS command (or in Civil 3D Toolspace, Settings, Edit Drawing Settings by right-clicking the drawing name, Unit and Zone).Ģ. Projection method one, choose and follow: The easiest way to set up a projection is to choose one that looks like it's for your area and then follow it using something like the GEOMAP command (requires an Autodesk login) or a shapefile import you can compare to.ġ. Let's consider three options for setting up a projection for your drawing, starting from the easiest. Setting your drawing's projection can be the daunting part. You will use the ADESETCRDSYS command (or in Civil 3D, Toolspace, Settings, Edit Drawing Settings by right-clicking the drawing name, Unit and Zone) to set up your projection.
Once you choose or create a geographic projection, you can import/export GIS information to/from anybody in the world from/to your drawing in AutoCAD.
In other words, a geographic projection makes your drawing ready to talk to the whole world. This translation turns your drawing into a "geographic projection" of the earth's latitude and longitude onto some sort of a curved (not warped) plane (usually cylindrical or conical). This is done by creating or assigning a translation between your drawing's xy or ne coordinates and latitude and longitude coordinates. Second, you can't create shapefiles unless your drawing is connected to geographic coordinates (latitude and longitude). Then you will zip them into a single compressed file called parcel.zip and send the zip file (or another compression format you both like better such as tar.gzip, rar, 7z, etc.). You will create this set of files in a new folder to keep things simple. So what your dear correspondent wants is probably not really a "file", but a zipped up set of files among which is a file called parcel.shp. Let's assume you want to send a parcel shapefile "parcel".įirst, you have to understand two new concepts.įirst, the word "shapefile" is used as shorthand for a group of GIS files in a folder that all have the same name and different extensions. But you need to learn a few new tricks and terms. And it requires nothing but AutoCAD (assuming you have the ADESETCRDSYS and MAPEXPORT commands available). How can you give them a shapefile? It's pretty easy. Somebody wants a shapefile and you are an AutoCAD user or a Civil 3D user.
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