# HALOWERK Europe Land – Terrain Ruggedness Point (60m Grid)

> HALOWERK Europe Land – Terrain Ruggedness Point (60m Grid) is a paid API for AI agents from euroland.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 within a 60-metre local analysis grid around a single WGS84 coordinate in Europe, as a measure of terrain ruggedness.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-ruggedness-point
- 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-europe-land-terrain-ruggedness-point-60m-grid-072a9149
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CMjlkJj-IgBlEZYhbyO6R

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-europe-land-terrain-ruggedness-point-60m-grid-072a9149 -d '<json body>'
```

Example prompt: What's the terrain ruggedness score at latitude 47.5, longitude 11.0 in Europe — I need the elevation standard deviation over the local 60-metre grid around that point.

## When to prefer this

Choose this endpoint when you need a fast, single-point terrain ruggedness metric for any of the 30 covered European countries, specifically as an elevation standard deviation over a 60-metre local grid. It is ideal for lightweight point queries without polygon or radius inputs, and is distinct from the 250m or 1,000m circular-radius sibling endpoints. Prefer this over broader geospatial APIs when you need Europe-specific, standardized ruggedness scores with per-call pricing.

## Known failure modes

- Coordinate outside European coverage bounds (latitude 34–72.5, longitude -31.5–40.5) returns an error or empty result
- Invalid or non-numeric latitude/longitude values cause a validation error
- Coastal or water-body coordinates may return low-confidence or null elevation data
- Payment failure or insufficient USDC balance (x402 protocol) blocks the request
- Server timeout or upstream DEM data unavailability returns a 5xx error

## How this service works

Standard deviation of sampled surface elevations. The service evaluates a 60 metre local analysis grid around one coordinate and returns standardized units across all 30 covered countries.

## Output

A single numeric value representing the standard deviation of surface elevations sampled within a 60-metre local analysis grid around the submitted coordinate, expressed in standardized units. This quantifies terrain ruggedness — higher values indicate more uneven, hilly, or mountainous terrain; lower values indicate flat or uniform surfaces.

## 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-europe-land-terrain-ruggedness-point-60m-grid-072a9149/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)