# HALOWERK Atlantic Land – Luxembourg Terrain Ruggedness Index

> HALOWERK Atlantic Land – Luxembourg Terrain Ruggedness Index is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the standard deviation of sampled surface elevations (terrain ruggedness) for a WGS84 coordinate validated within Luxembourg's boundaries.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-ruggedness
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-luxembourg-terrain-ruggedness-index-d6900162
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b8lj-qF8szBP6M1gA75uc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-atlantic-land-luxembourg-terrain-ruggedness-index-d6900162 -d '<json body>'
```

Example prompt: What's the terrain ruggedness index for the location at latitude 49.75, longitude 6.17 in Luxembourg — I need the standard deviation of surface elevations there for a site suitability assessment.

## When to prefer this

Choose this endpoint when you need a quantitative measure of terrain roughness or elevation variability at a specific point within Luxembourg, particularly for land assessments, infrastructure planning, or environmental analysis. It is distinct from slope or gradient endpoints (which measure directional change) and runoff tendency endpoints (which combine multiple factors); this endpoint focuses purely on elevation standard deviation as a ruggedness proxy.

## Known failure modes

- Coordinate outside Luxembourg's Natural Earth boundary — request rejected, no charge
- Latitude or longitude out of published European coverage range — validation error
- Missing required latitude or longitude parameter — schema validation error
- Network or server error returning HTTP 5xx

## How this service works

Standard deviation of sampled surface elevations. The coordinate is validated against the Natural Earth boundary for Luxembourg; results outside it are rejected before payment.

## Output

A numeric value representing the standard deviation of sampled surface elevations at the given coordinate, indicating terrain ruggedness. If the coordinate falls outside the Luxembourg boundary, the request is rejected before any charge is incurred.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-atlantic-land-luxembourg-terrain-ruggedness-index-d6900162/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)