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Authenticate once, explore surveys with rich metadata, and stream tiles that are ready for production basemaps or ML pipelines. Built for companies who need reliable, high-resolution coverage fast.

| Spec | Value |
| --- | --- |
| **Zoom range** | Z14–Z21 |
| **Median tile latency** | ~ 200 ms |
| **Formats** | PNG / JPEG |
| **Tile size** | 256 × 256 px |

## Access Models

Both services share the same **OAuth2 auth flow** and reference the full Near Space Labs catalog.

### Tile Service  
**Best for:** Interactive maps · Fast imagery refresh

A standards-based XYZ tile service for both historical and latest mosaics. Filter by area (WKT), capture time, cloud cover, and instantly fetch metadata plus tiles.

- Authenticated XYZ tiles + metadata
- PNG + JPEG support, 256 × 256 tiles
- Designed for web + mobile maps, geospatial analytics

## Workflow at a Glance

Every client follows the same three steps:

1. **Authenticate** — Exchange your NSL credentials for an OAuth token
2. **Discover** — Browse surveys, footprints, and coverage by area
3. **Download** — Stream tiles into your app

Follow along in the next pages for detailed instructions and code examples for each step.

## Why Surveys?

Imagery ships as **surveys**: mosaics captured over a short timeframe. They make catalog browsing faster, keep payloads small, and provide a stable identifier.