# BTS Geospatial Search API (NTAD)

**Canonical:** https://apis.io/apis/bureau-of-transportation-statistics/bts-geospatial-search-api/  
**Provider:** Bureau of Transportation Statistics — https://apis.io/providers/bureau-of-transportation-statistics/  
**Base URL:** https://geodata.bts.gov  
**Documentation:** https://geodata.bts.gov/

BTS Geospatial Search API (NTAD) is one of 6 APIs that [Bureau of Transportation Statistics](https://apis.io/providers/bureau-of-transportation-statistics/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Federal-Government, Transportation, Geospatial, Open Data, and OGC. The published artifact set on APIs.io includes an OpenAPI specification and an API reference.

The search and catalog API behind Geospatial at the Bureau of Transportation Statistics, the home of the National Transportation Atlas Database (NTAD). It is a conformant OGC API - Records implementation: the landing page at /api/search/v1 advertises a conformance document declaring nine opengis.net classes across OGC API - Common Parts 1 and 2, OGC API - Features Part 1 and OGC API - Records Part 1, and a service-desc link to a first-party OpenAPI 3.0 definition with 17 operations. Catalog records resolve to 1,079 live ArcGIS FeatureServer layers plus GeoJSON, CSV, Shapefile, KML and GeoPackage downloads. Anonymous, free, read-only.

## Operations (17)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/search/v1/catalog` | — |
| GET | `/api/search/v1/collections` | — |
| GET | `/api/search/v1/collections/{collectionId}` | — |
| GET | `/api/search/v1/collections/{collectionId}/queryables` | — |
| GET | `/api/search/v1/collections/{collectionId}/items` | — |
| GET | `/api/search/v1/collections/{collectionId}/items/{itemId}` | — |
| GET | `/api/search/v1/collections/{collectionId}/items/{recordId}/related` | — |
| GET | `/api/search/v1/collections/{collectionId}/items/{recordId}/connected` | — |
| GET | `/api/search/v1/collections/{collectionId}/aggregations` | — |
| GET | `/api/search/v1` | — |
| GET | `/api/search/v1/conformance` | — |
| GET | `/api/search/v1/rest/info` | — |
| GET | `/api/search/v1/rest/services/collections/{collectionId}/geoservice/FeatureServer` | — |
| GET | `/api/search/v1/rest/services/collections/{collectionId}/geoservice/FeatureServer/layers` | — |
| GET | `/api/search/v1/rest/services/collections/{collectionId}/geoservice/FeatureServer/{layerIndex}` | — |
| GET | `/api/search/v1/rest/services/collections/{collectionId}/geoservice/FeatureServer/{layerIndex}/info` | — |
| GET | `/api/search/v1/rest/services/collections/{collectionId}/geoservice/FeatureServer/{layerIndex}/query` | — |

## Machine-readable artifacts (6)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/bureau-of-transportation-statistics/refs/heads/main/openapi/bureau-of-transportation-statistics-geodata-search-openapi.json
- **APIReference** — https://geodata.bts.gov/api/search/definition/
- **Portal** — https://geodata.bts.gov/
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/bureau-of-transportation-statistics/refs/heads/main/conformance/bureau-of-transportation-statistics-geodata-conformance.json
- **DataCatalog** — https://geodata.bts.gov/api/feed/dcat-us/1.1.json
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/bureau-of-transportation-statistics/refs/heads/main/overlays/bureau-of-transportation-statistics-geodata-search-overlay.yaml

## Other Bureau of Transportation Statistics APIs (5)

- [BTS Open Data SODA API](https://apis.io/apis/bureau-of-transportation-statistics/bts-open-data-soda-api/)
- [TranStats - Airline On-Time Performance Data](https://apis.io/apis/bureau-of-transportation-statistics/transtats/)
- [BTS Freight Analysis Framework (FAF)](https://apis.io/apis/bureau-of-transportation-statistics/bts-freight-data/)
- [Bureau of Transportation Statistics Metadata API](https://apis.io/apis/bureau-of-transportation-statistics/bureau-of-transportation-statistics-metadata-api/)
- [Bureau of Transportation Statistics Resource API](https://apis.io/apis/bureau-of-transportation-statistics/bureau-of-transportation-statistics-resource-api/)

## Tags

Federal-Government, Transportation, Geospatial, Open Data, OGC

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/bureau-of-transportation-statistics/bts-geospatial-search-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/bureau-of-transportation-statistics/.