# HALOWERK Central Land – Terrain Ruggedness (Austria)

> HALOWERK Central Land – Terrain Ruggedness (Austria) is a paid API for AI agents from mitteleuropa.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 coordinate within Austria.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-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-central-land-terrain-ruggedness-austria-aa5b85c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P8E1NKArvKMUFwR2HrugF

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-central-land-terrain-ruggedness-austria-aa5b85c1 -d '<json body>'
```

Example prompt: What's the terrain ruggedness at coordinates 47.4°N, 13.8°E in Austria — I need the elevation standard deviation for that area.

## When to prefer this

Choose this endpoint when you need a terrain ruggedness or elevation variability metric specifically for a point in Austria, derived from Copernicus DEM GLO-30 data. It is ideal for site suitability analysis, ecological modelling, infrastructure planning, or any workflow requiring quantified landscape roughness at high spatial resolution within Austrian territory.

## Known failure modes

- Coordinate outside Austria boundary: rejected before payment, error response returned
- Coordinate outside published European coverage (lat 34–72.5, lon -31.5–40.5): validation failure
- Invalid or missing latitude/longitude: schema validation error
- Service unavailable or DEM data gap: upstream data error

## How this service works

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

## Output

A numeric value representing the standard deviation of sampled surface elevations (in metres) within the analysis neighborhood around the given coordinate, indicating how rugged or variable the terrain is. Coordinates outside Austria's Natural Earth boundary are rejected with an error 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-central-land-terrain-ruggedness-austria-aa5b85c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)