Data Catalog

• Federal

  National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection NGDA

  Department of the Interior —

  The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's...

  • XML
  • XML
• Federal

  National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection

  Department of the Interior —

  The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography...

  • XML
  • XML
• County

  Retaining Wall Permits

  Montgomery County of Maryland —

  A permit is required to install a retaining wall if the height of the wall measured from the bottom of the footing to the top of the wall is over 48 inches unless...

  • CSV
  • RDF
  • JSON
  • XML

• Fence, Wall and Miscellaneous (Structure Lines)

  District of Columbia —

  Structure Lines. Contract NCPC 93-02. This document describes the planimetric map production for the 350 tiles located in Washington DC and the surrounding states of...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 3 more in dataset
• City

  Wall

  City of Hartford —

  The planimetric data was compiled by The Sanborn Map Company, Inc for the Metropolitan District and is based on an aerial flight performed in April 2015. In addition,...

  • HTML
  • ArcGIS GeoServices REST API
  • CSV
  • ZIP
  • GeoJSON
  • KML
• City

  DPW Maintained Roadway Structures

  City of San Francisco —

  Structures in the public right of way maintained by DPW. Source: DPW'S RSIS system.

  • CSV
  • RDF
  • JSON
  • XML

You can also access this registry using the API (see API Docs).

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