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MAR Web Geocoder User Guide

Published by Office of the Chief Technology Officer | District of Columbia | Catalog Last Checked: May 05, 2026 at 10:36 PM | Dataset Last Updated: April 11, 2025 at 02:43 PM
The MAR Web Geocoder is a web browser-based tool for geocoding locations, typically addresses, in Washington, DC. It is developed by the Office of Chief Technology Officer (OCTO) and can input Excel or CSV files to output an Excel file. Geocoding is the process of assigning a location in the form of geographic coordinates (often expressed as latitude and longitude) to spreadsheet data. This is done by comparing the descriptive geographic data to known geographic locations such as addresses, blocks, intersections, or place names.

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