Dimension scores are derived from public data and fields; weighted into the composite. Reference only.
EPSG.org is the official site where IOGP publishes the EPSG Geodetic Parameter Dataset, providing web search, data downloads, version archives, and a RESTful API through GeoRepository. The dataset contains a large number of coordinate reference systems, coordinate transformations, and related geodetic parameter definitions, covering global, regional, national, and local use cases. It is the de facto standard in the geospatial industry.
Its core function is not as a general-purpose SaaS product, but as an authoritative geodetic parameter registry. Developers can search EPSG codes, CRS entries, transformation parameters, areas of use, and remarks through text search or map search, and can also download the latest or historical versions of the dataset. The data model follows ISO 19111:2019 and supports dynamic datums, geoid-based vertical datums, datum ensembles, and derived projected CRS definitions. On the API side, the site provides a public RESTful EPSG Registry / GeoRepository API, Swagger documentation, user guides, JSON response examples, GML/WKT export instructions, and Python sample code. The official documentation also notes that because the data is relatively static, most regular applications are better suited to downloading a local copy for queries rather than frequently calling the online API.
EPSG Facilities are published free of charge by IOGP, but users must accept the Terms of Use. The data may be used, copied, and distributed, but the EPSG Dataset itself may not be distributed as a profit-making product. It may be included in commercial software packages, provided that the commercial value comes from value-added services, and IOGP ownership must be acknowledged. Users should also pay attention to the disclaimer and restrictions regarding attribution for modifications.
Its strengths are extremely high authority, broad industry adoption, complete documentation and data formats, and support for SQL scripts, Access databases, local deployment-style querying, and API integration. Its drawbacks are that more web features require registration, the terms impose quite a few restrictions, the API is more of an authoritative data access interface than a high-availability online dependency, and the domain knowledge threshold is relatively high.
It is best suited for GIS, surveying and mapping, remote sensing, spatial database, map service, and geoscience engineering software teams that need to build reliable CRS and coordinate transformation capabilities. The original text does not provide information on access performance from mainland China, so this is assessed as unknown.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on epsg.org official site.
epsg.org is an International API & Data provider. TG4G tracks its product information, an overall rating of 7.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach epsg.org directly.