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GIS & Geospatial Technologies: Geocoding

What is Geocoding

Geocoding is the process of transforming a description of a location—such as a pair of coordinates, an address, or a name of a place—to a location on the earth's surface. You can geocode by entering one location description at a time or by providing many of them at once in a table. The resulting locations are output as geographic features with attributes, which can be used for mapping or spatial analysis. With geocoded addresses, you can spatially display the address locations and begin to recognize patterns within the information.

Geocoding Resources and Tools


ArcGIS Pro/ArcGIS Map



50,000 Addresses or Less

50,000 addresses or less

If you have a table of 50,000 addresses or less, the ArcGIS Online geocoding tools will work. ArcGIS Online uses credits, which are allocated to you as a member of the UC San Diego ArcGIS Online organization. You are provided a default number of credits (2,000).

For additional credits, reach out to:

If you have sensitive data with HIPA or PII information, you will want to use one of the other options.

50,000 to 2 Million Addresses

50,000 to 2million addresses

If you have a table between 50,000 and 2 million addresses, there are a few options for you. You can use the computers in the Data & GIS Lab or you can can reach out and request access to the Library's Geocoding service. Both the Lab and the Library's geocoding service use Esri's Streetmap Premium. Using the physical machines in the Lab enables you to geocode the addresses locally. The Library's Geocoding service runs on library servers. 

Data & GIS Lab

  1. Open and log on to ArcGIS Pro
  2. Add your table to ArcGIS Pro
  3. Right click your table, and select menu option "Geocode Addresses"
  4. Go to the tool.
  5. Input Locator:  browse to the folder on the Data & GIS Lab computers ONLY:  C://EsriStreetMap Premium/NewLocators (see note about classic locators)
    ​You may also browse the Classic Locators folder.

More than 2.5 Million Addresses

more than 2 million addresses