# HALOWERK Atlantic Land – Belgium Surface Ruggedness

> HALOWERK Atlantic Land – Belgium Surface Ruggedness 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 index) for a given WGS84 coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-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-belgium-surface-ruggedness-02116853
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UeXty5-WFnXY4b-9ie__U

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-belgium-surface-ruggedness-02116853 -d '<json body>'
```

Example prompt: What's the terrain ruggedness at latitude 50.45, longitude 4.87 in Belgium — I need the standard deviation of surface elevations for that spot.

## When to prefer this

Use this endpoint when you need a quantitative measure of terrain roughness or elevation variability for a specific point in Belgium, particularly for land suitability analysis, construction planning, hydrological modeling, or route assessment. It is purpose-built for Belgian coordinates and validates boundary membership before billing, making it safe for automated agent workflows. Prefer this over generic elevation APIs when you specifically need ruggedness (standard deviation of elevations) rather than a single elevation value.

## Known failure modes

- Coordinate outside Belgium boundary — rejected before payment is processed
- Latitude or longitude outside published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid coordinate format or missing required fields — input schema error
- Service unavailable or network timeout — no result returned

## How this service works

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

## Output

A numeric value representing the standard deviation of sampled surface elevations at the queried coordinate, serving as a terrain ruggedness index. Coordinates outside the Belgium boundary are rejected prior to processing. Returns a single scalar ruggedness metric for the specified point.

## 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-belgium-surface-ruggedness-02116853/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)