MAR Web Geocoder User Guide

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.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://www.arcgis.com/home/item.html?id=e60ae134daf943c9949d4e7003984b29
issued 2022-09-07T16:01:48.000Z
landingPage https://opendata.dc.gov/documents/DCGIS::mar-web-geocoder-user-guide
license https://creativecommons.org/licenses/by/4.0
metadata_type geospatial
modified 2025-04-11T14:43:55.000Z
old-spatial -77.2258,38.7867,-76.8125,39.0009
publisher Office of the Chief Technology Officer
resource-type Dataset
source_datajson_identifier true
source_hash 3cccc399bc93bad8b4595d41d55eea52ade5ced7791521d8ebc9976e563d6707
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-77.2258, 38.7867], [-77.2258, 39.0009], [-76.8125, 39.0009], [-76.8125, 38.7867], [-77.2258, 38.7867]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • district-of-columbia
  • geocoder
  • geocoding
  • mar
  • master-address-repository
  • washington-dc
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer DCGISopendata
maintainer_email gisgroup@dc.gov
metadata_created 2025-09-23T14:23:09.774532
metadata_modified 2025-09-23T14:23:09.774537
notes 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.
num_resources 1
num_tags 14
title MAR Web Geocoder User Guide