# HALOWERK Eastern Land – Romania Surface Elevation (Copernicus DEM GLO-30)

> HALOWERK Eastern Land – Romania Surface Elevation (Copernicus DEM GLO-30) is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns bilinear-interpolated surface elevation at a WGS84 coordinate within Romania, sourced from the Copernicus DEM GLO-30 dataset.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-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-eastern-land-romania-surface-elevation-copernicus-dem-glo-30-990bf90e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h_irchbjmN2mvN_iJNqfG

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-eastern-land-romania-surface-elevation-copernicus-dem-glo-30-990bf90e -d '<json body>'
```

Example prompt: What's the surface elevation at latitude 45.9432 and longitude 24.9668 in Romania? I need the Copernicus DEM GLO-30 value for that point.

## When to prefer this

Choose this endpoint when you need precise, bilinearly interpolated surface elevation for a specific point within Romania, sourced from the high-resolution Copernicus DEM GLO-30 (30m global coverage). It is ideal for single-point lookups requiring accuracy over Romania's terrain. It is distinct from batch elevation services, non-Romania-specific DEM endpoints, or soil/vegetation data endpoints on the same platform.

## Known failure modes

- Coordinate outside Romania boundary: request rejected before payment, returns an error indicating the point is outside the supported region
- Latitude or longitude out of European coverage range (lat < 34 or > 72.5, lon < -31.5 or > 40.5): validation error
- Missing or malformed latitude/longitude fields: schema validation error
- Service unavailable or DEM data access failure: HTTP 5xx error

## How this service works

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

## Output

A numeric surface elevation value (in metres above sea level) bilinearly interpolated from the Copernicus DEM GLO-30 grid at the requested WGS84 coordinate. Coordinates are validated against the Natural Earth boundary of Romania; requests outside this boundary are rejected before any charge is applied.

## 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-eastern-land-romania-surface-elevation-copernicus-dem-glo-30-990bf90e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)