How To: Define a custom projection for a geodatabase
This article describes how to define a custom projection for a geodatabase using ArcToolBox.
As an example, we use the Wisconsin Tranverse Mercator projection with the following parameters as the custom projection:
- Map Projection: Transverse Mercator
- Central Meridian: -90
- Latitude of Origin: 0
- Scale Factor: 0.9996
- False Easting: 520,000
- False Northing: -4,480,000
- Units: Meter
- Datum: NAD 1983
- Start ArcToolBox.
- Open the Data Management Tools > Projections toolbox.
- Double-click Define Projection Wizard (shapefiles, geodatabases).
- Click the Browse icon and navigate to the location of the geodatabase.
- Select the feature class and click the Add button.
- Click Next.
- Click Select Coordinate System.
- Click New in the Spatial Reference Properties dialog box.
- Select the projection in the popup window. Projected applies to the Wisconsin Transverse Mercator projection example.
- Type a name for the new projection.
- Set Name to Transverse_Mercator.
- Type the parameters for the projection. See the parameters for the Wisconsin Transverse Mercator projection listed above.
- Set the Linear Unit to Meter.
- Click the Select button to load the Geographic Coordinate System.
- Open the North America folder.
- Select North American Datum 1983.prj and click Add.
- Click OK.
- Click Apply and OK to close the Spatial Reference dialog.
- Click Next.
- Review the Summary and click Finish.
Last Published: 6/9/2018
Article ID: 000004602
Software: ArcGIS-ArcEditor 8.3, 8.2, 8.1.2, 8.1 ArcGIS-ArcInfo 8.3, 8.2, 8.1.2, 8.1 ArcGIS-ArcView 8.3, 8.2, 8.1.2, 8.1