Spatial Reference

SpatialReference.org serves as a comprehensive online catalog dedicated to spatial coordinate reference systems (CRS). It provides detailed information essential for geospatial professionals, GIS developers, and cartographers. The platform facilitates easy searching, access, and implementation of various spatial references, supporting standardized formats such as Well-Known Text (WKT) and PROJJSON. Key features include an extensive database of geographic systems like WGS 84 and NAD83(2011), thousands of projected systems such as UTM zones, and vertical systems like NAVD88.

One of the site's primary strengths is its robust support for EPSG codes, a widely recognized standard for defining CRSs. These codes simplify the identification and use of spatial reference systems across numerous geospatial applications. Users can explore references by various authorities, including EPSG, ESRI, IAU:2015, IGNF, NKG, and OGC, with thousands of entries available for each. This extensive collection ensures that users can find precise CRS definitions required for their projects.

Built using PROJ 9.7.1, a powerful open-source library for coordinate transformation, SpatialReference.org offers a reliable and up-to-date resource. The website also features an interactive explorer, allowing users to visualize and understand different CRSs in a geographical context. This functionality, combined with the availability of detailed reference data, makes it an invaluable tool for ensuring accuracy and interoperability in geospatial data management and analysis.