# HALOWERK Europe Land – Aspect 1000m Buffer

> HALOWERK Europe Land – Aspect 1000m Buffer is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the dominant surface aspect (circular direction of steepest downhill gradient, clockwise from north) averaged over a 1,000-metre circular neighbourhood around a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-aspect-buffer-1000m
- Price: $0.006/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-aspect-1000m-buffer-85bd2154
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9ucPXPcmA2nACYuZhPCfm

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-aspect-1000m-buffer-85bd2154 -d '<json body>'
```

Example prompt: What direction does the terrain face at latitude 47.3, longitude 11.1 in Austria — give me the dominant surface aspect over a 1,000-metre area?

## When to prefer this

Use this endpoint when you need a broader, landscape-scale terrain orientation (1km neighbourhood) rather than a local point estimate, which smooths out micro-topographic noise. Prefer over the 60m buffer variant when the use case involves regional planning, hydrology, solar exposure modelling, or wildfire risk where local terrain fluctuations should be averaged out. Coverage is standardised across 30 European countries, making it ideal for cross-border analysis.

## Known failure modes

- Coordinates outside the European coverage bounding box (lat 34–72.5, lon -31.5–40.5) return an error or empty result
- Invalid or missing latitude/longitude values cause a validation error
- Flat terrain with no dominant gradient may return a noisy or undefined aspect value
- Payment failure (insufficient USDC) prevents the response from being returned under x402 protocol

## How this service works

Circular direction of the dominant surface gradient, clockwise from north. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized scalar value representing the dominant circular direction (in degrees, clockwise from north, 0–360) of the surface gradient within a 1,000-metre circular neighbourhood around the supplied coordinate, consistent across all 30 covered European countries.

## 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-aspect-1000m-buffer-85bd2154/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)