# HALOWERK Central Land – Austria Surface Elevation

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

Returns bilinear-interpolated surface elevation in meters for a WGS84 coordinate within Austria, sourced from the Copernicus DEM GLO-30 dataset.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-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-central-land-austria-surface-elevation-32d30a2d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bifnTBU4LKTT7gL4LY2u8

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-austria-surface-elevation-32d30a2d -d '<json body>'
```

Example prompt: What's the surface elevation in meters at latitude 47.8095 and longitude 13.0550 in Austria, using the Copernicus DEM GLO-30?

## When to prefer this

Choose this endpoint when you need a precise, bilinearly interpolated surface elevation value for a specific point coordinate within Austria using the Copernicus DEM GLO-30 dataset. It is ideal for applications requiring sub-pixel accuracy in terrain height lookups (e.g. route planning, flood modeling, construction feasibility) specifically within Austrian boundaries. The built-in coordinate validation against the Natural Earth Austria boundary ensures you are not charged for out-of-scope queries. Prefer alternatives if you need elevation data outside Austria, elevation profiles along paths, or other terrain derivatives (slope, aspect, roughness) — sibling endpoints on the same host cover those needs.

## Known failure modes

- Coordinate outside Austria boundary — request rejected before payment with an error indicating the point is outside the supported region
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed request body or missing required fields — 400-level error
- Payment failure or insufficient USDC balance — transaction rejected
- Temporary service unavailability — 5xx error

## How this service works

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

## Output

A single numeric surface elevation value in meters, bilinearly interpolated from the Copernicus DEM GLO-30 30-meter resolution grid at the requested WGS84 coordinate. The response is only returned if the coordinate falls within the Natural Earth boundary of Austria; requests outside this boundary are rejected 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-austria-surface-elevation-32d30a2d/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)