OpenTopography for Developers

Learn how to access data via APIs and leverage OpenTopography services for your applications.

OpenTopography API

OpenTopography's REST API is documented using the OpenAPI specification and available via Swagger for visualizing and testing via the browser.

Catalogue Service for the Web

CSW (Catalogue Service for the Web) is an OGC (Open Geospatial Consortium) specification that defines common interfaces to discover, browse, and query metadata about data and services. OpenTopography provides access to its data catalog via the CSW standard. Any client supporting the CSW standard can integrate the OpenTopography CSW endpoint.

OpenTopography CSW OpenTopography's CSW endpoints are implemented using the open source Esri Geoportal Server with support for the OGC CS-W 2.0.2 standard. It supports REST, GeoRSS, OpenSearch, CSW, ATOM, GeoJSON, KML, and HTML to expose content from the catalog service to external clients.

GetCapabilities The GetCapabilities operation provides CSW clients with service metadata about the CSW service as an XML document.

Example: HTTP GET:

GetRecordById Example:{5D08C4EB-45FA-4FCB-A07A-E1B5E8B61AB3}

For more supported operations please follow the sample requests shown on and geoportal server as a Broker help document for the different service protocols supported using the base URL

Related services

The National Map - Elevation Point Query Service

The Elevation Point Query Service returns the elevation in international feet or meters for a specific latitude/longitude (NAD 1983) point from the USGS 3DEP 1/3 arc-second layer hosted at the NGTOC.

RESTful Web service for Global Multi-Resolution Topography (GMRT) synthesis data access

This web service from the Marine Geoscience Data System (MGDS) is used by OpenTopography's GMRT dataset interface. OpenTopography generates the proper service call based on user input through our user interface and downloads the result to our servers. Then, we perform additional processing as requested by the user, such as visualizations and hydrologic analysis. More information on the GMRT web service is available on the MGDS website.