# HALOWERK Nordic Land – Terrain Ruggedness (Norway)

> HALOWERK Nordic Land – Terrain Ruggedness (Norway) is a paid API for AI agents from nordland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the standard deviation of sampled surface elevations for a given coordinate within Norway, quantifying terrain ruggedness.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-ruggedness
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-nordic-land-terrain-ruggedness-norway-ca0c39b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VUVsqGWwrIzu1uaTPVSMt

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-nordic-land-terrain-ruggedness-norway-ca0c39b2 -d '<json body>'
```

Example prompt: What's the terrain ruggedness — standard deviation of surface elevations — at latitude 60.47 and longitude 8.47 in Norway?

## When to prefer this

Choose this endpoint when you need a precise, per-point terrain ruggedness metric for locations within Norway, especially when integrating with other HALOWERK Nordic Land soil and land cover data. It is ideal for workflows requiring elevation variability as a numeric signal (e.g., site assessment, ecological modeling, agricultural suitability) rather than a qualitative or visual terrain description.

## Known failure modes

- Coordinate outside Norway boundary rejected with validation error
- Latitude or longitude out of the published European coverage range returns an error
- Network or payment failure results in no response
- Ambiguous or missing coordinates cause a request schema validation error

## How this service works

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

## Output

A numeric value representing the standard deviation of sampled surface elevations at the queried coordinate, indicating how rugged or variable the terrain is in that area. Coordinates outside the Norway boundary are rejected before the result is returned.

## 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-nordic-land-terrain-ruggedness-norway-ca0c39b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)