# HALOWERK Europe Land – Surface Elevation 1000m Buffer

> HALOWERK Europe Land – Surface Elevation 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 bilinear surface elevation (from Copernicus DEM GLO-30) averaged over a 1,000-metre circular neighbourhood around a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-elevation-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-surface-elevation-1000m-buffer-48910821
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l6I1qkS0sI0cMoaHMDHHM

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-surface-elevation-1000m-buffer-48910821 -d '<json body>'
```

Example prompt: What is the Copernicus DEM surface elevation averaged over a 1,000-metre radius around latitude 48.8566, longitude 2.3522 in France?

## When to prefer this

Choose this endpoint when you need a spatially smoothed, neighbourhood-scale elevation value (1km radius) at a precise European coordinate using the authoritative Copernicus DEM GLO-30 dataset. It is ideal for site analysis, risk assessment, or data enrichment workflows that require standardized, consistent elevation across all 30 covered European countries. Prefer it over point-only elevation APIs when local terrain context matters.

## Known failure modes

- Coordinate outside European coverage (latitude 34–72.5°N, longitude −31.5–40.5°E) returns an error or empty result
- Invalid or missing latitude/longitude fields cause a validation error
- Coordinates on the coverage boundary may produce partial or noisy results
- Service unavailability results in HTTP 5xx errors

## How this service works

Bilinear surface elevation from Copernicus DEM GLO-30. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A numeric surface elevation value (in standardized units) derived via bilinear interpolation from the Copernicus DEM GLO-30 dataset, representing the mean terrain height across a 1,000-metre circular buffer around the queried coordinate.

## 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-surface-elevation-1000m-buffer-48910821/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)