# HALOWERK Southern Land – Malta Surface Elevation

> HALOWERK Southern Land – Malta Surface Elevation is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns bilinear-interpolated surface elevation (metres) for a WGS84 coordinate in Malta, sourced from Copernicus DEM GLO-30, with boundary validation against the Natural Earth Malta polygon.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-elevation
- 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-southern-land-malta-surface-elevation-2cd37d50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TTBn8nlgtCs49FoyCfK_z

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-southern-land-malta-surface-elevation-2cd37d50 -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 35.8997, longitude 14.5147 in Malta according to the Copernicus DEM GLO-30 data?

## When to prefer this

Choose this endpoint when you need point-level terrain elevation specifically within Malta using the high-resolution Copernicus DEM GLO-30 dataset, particularly when Malta boundary validation and bilinear interpolation accuracy are required. Prefer over general-purpose elevation APIs when working within the Malta geographic scope and when micropayment-per-call pricing is acceptable.

## Known failure modes

- Coordinate outside Malta boundary: rejected before payment with a validation error
- Coordinate within European coverage range but outside Malta polygon: boundary check fails and call is rejected
- Malformed latitude/longitude (out of schema min/max range): request validation error
- Network or upstream DEM service unavailability: server-side error response

## How this service works

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

## Output

A numeric surface elevation value in metres derived via bilinear interpolation from the Copernicus DEM GLO-30 raster for the queried WGS84 coordinate. Coordinates outside the Natural Earth boundary for Malta are rejected before payment is processed.

## 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-southern-land-malta-surface-elevation-2cd37d50/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)