Government · head-to-head
City, Nantes Open Data vs District of Columbia Open Data
Nantes Métropole's open-data portal runs OpenDataSoft; the stored record's `API Key` requirement is stale — a live keyless GET against the v2.1 Explore API (`data.nantesmetropole.fr/api/explore/v2.1/catalog/datasets`) returned full JSON catalogue metadata with a wildcard `Access-Control-Allow-Origin` header, and dataset exports in GeoJSON and CSV worked the same way with no key. An API key is only required for OpenDataSoft's write/administration endpoints, not for reading the catalogue's 590+ datasets.
Open Data DC is the District of Columbia government's catalogue of public datasets, spanning crime incidents, GIS/mapping layers, and financial and demographic data, published on an Esri ArcGIS Hub site. Datasets are queryable keyless through the Hub's search and DCAT feed APIs and through individual ArcGIS Feature/Map Services, returning JSON, GeoJSON, CSV, or shapefile depending on the layer. No account or API key is required to read data.
| City, Nantes Open Data | District of Columbia Open Data | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, CSV, GeoJSON | JSON, GeoJSON, CSV, Shapefile |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
District of Columbia Open Data supports 4 response formats, while City, Nantes Open Data offers fewer — pick District of Columbia Open Data for more integration flexibility.