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FAQ: What are some best practices when geocoding intersections using an address locator?

Question

What are some best practices when geocoding intersections using an address locator?

Answer

This article provides some best practices related to geocoding intersections using an address locator in ArcMap. Included are some useful tips to ensure the best possible results are returned.

Include the street name in the input address and an intersection connector when geocoding intersections

The default behavior for searching intersections is to use the street addresses from two intersecting streets. The address locator considers the location as an intersection address if two street names are separated by an intersection connector, such as ampersand (&) or at sign (@). An example is 345 New York Street & Redlands Boulevard.

For more information on setting intersection connectors, refer to the following ArcGIS Web Help topic: About modifying an address locator's settings.

Use a locator that supports intersection matching

Not every locator supports intersection matching. Only the Single Range and Dual Range locator styles support matching street intersections. For more information on properties of an address locator, refer to the following ArcGIS Web Help topic: About the locator properties.

Ensure the 'Match with no zones' option is set to 'Yes' in Address Locator Properties

The 'Match with no zones' property determines whether the address is found or matched if a zone, which is either a city and state name or a ZIP Code, is not included in the input address in the Geocoding toolbar, Find tool, or batch geocoding.

• If the zone option is set to No, the geocoding process only takes place around a certain zone. The zone data is usually required for finding the best match.
• If the zone option is set to Yes, the geocoding process takes place in all zone areas, thus returning more results. Although, it takes a longer time to search for the intersections without zones.

To set the 'Match with no zones' option to Yes, follow these instructions:

1. In ArcCatalog or the Catalog window, expand the Catalog tree, right-click the address locator, and click Properties. This opens the Address Locator Properties dialog box.
2. Expand the 'Geocoding options' section.
3. Click the 'Match with no zones' drop-down arrow, and select Yes.
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For more information on properties listed in the Geocoding options section, refer to the following ArcGIS Web Help topic: Geocoding options properties.

Use the Check Geometry and Repair Geometry tools before geocoding

Geometry errors can prevent a locator from matching intersections due to invalid connectivity of lines and vertices in the data.

For more information on checking and repairing geometry, refer to the following ArcGIS Web Help topics: Check Geometry and Repair Geometry.

If nothing is returned after searching for intersections, select the line segments that participate in the intersection and planarize the lines by using the Planarize Lines tool, found on the Advanced Editing toolbar. Run a rebuild on the existing address locator, or create a new one.

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