# HALOWERK Atlantic Land – Belgium Surface Elevation

> HALOWERK Atlantic Land – Belgium Surface Elevation is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns bilinear-interpolated surface elevation (metres) for a WGS84 coordinate within Belgium, sourced from Copernicus DEM GLO-30

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-elevation
- 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-atlantic-land-belgium-surface-elevation-a9f67851
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__rZKr8Vr7xSmlYxSAsNKV

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-atlantic-land-belgium-surface-elevation-a9f67851 -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 50.8503 and longitude 4.3517 in Belgium according to the Copernicus DEM GLO-30 data?

## When to prefer this

Choose this endpoint when you need precise, authoritative Copernicus GLO-30 surface elevation for a specific point within Belgium and require coordinate-boundary validation before incurring any cost. It is ideal for per-point elevation lookups in geospatial pipelines (flood modelling, construction site assessment, route planning) where Belgium is the area of interest. Prefer alternatives if you need elevation outside Belgium, bulk batch queries across multiple countries, or raster tile downloads rather than point lookups.

## Known failure modes

- Coordinate outside Belgium boundary — rejected before payment with a validation error
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon −31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude fields — 400 bad request
- Network or upstream DEM service unavailability — 5xx error
- Payment failure or insufficient USDC balance — 402 payment required

## How this service works

Bilinear surface elevation from Copernicus DEM GLO-30. The coordinate is validated against the Natural Earth boundary for Belgium; results outside it are rejected before payment.

## Output

Returns a numeric surface elevation value in metres above sea level, bilinearly interpolated from the Copernicus DEM GLO-30 30-metre resolution grid at the requested WGS84 coordinate. Coordinates are validated against the Natural Earth boundary for Belgium before the paid lookup is executed; requests outside Belgium are rejected.

## 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-atlantic-land-belgium-surface-elevation-a9f67851/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)