Geocoding is a method by which one can plot a list of addresses spatially. First, prepare your data:
- Address/street numbers and street names have to be in the same field and not separated by commas (e.g. 123 Main St rather than 123, Main St).
- Make sure column headings do not have spaces or special characters and are less than 8 characters.
Next, you can use the geocode tool in ArcMap:
- Add your table with addresses to ArcMap.
- Right click on the table and select Geocode Addresses.
- Click Add to choose an Address Locator. If you are a member of the MIT Community you can download address locators for the United States from the same IS&T website from which you download ArcGIS: https://ist.mit.edu/arcgis. You can also create your own address locator if you have the appropriate street data.
- In the Address Input Fields section, select one of the following options:
- Single Field—The complete input address, such as 303 Peachtree St NE, Atlanta GA 30308, is stored in one field in the address table.
- Multiple Fields—Each input address is broken down into multiple fields, such as Address, City, State, and ZIP Code for a general United States address.
- Click the drop-down arrow of each input address field and select the corresponding field from the input address table.
- Click OK to start geocoding the table.
- You can review and modify the unmatched addresses by clicking on the Review/Rematch Addresses button in the Geocoding toolbar:
Click Customize > Toolbars if you do not see the Geocoding toolbar.