# HALOWERK Nordic Land – Denmark Surface Elevation (Copernicus DEM GLO-30)

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

Returns bilinearly interpolated surface elevation in metres for a WGS84 coordinate inside Denmark, sourced from Copernicus DEM GLO-30.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-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-nordic-land-denmark-surface-elevation-copernicus-dem-glo-30-9d02f53d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_znznMcietyxvTfyYNp0ln

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-nordic-land-denmark-surface-elevation-copernicus-dem-glo-30-9d02f53d -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 55.6761° N, longitude 12.5683° E in Denmark? I need the Copernicus DEM GLO-30 bilinear interpolated height in metres.

## When to prefer this

Choose this endpoint when you need precise, per-point surface elevation for a coordinate known to be within Denmark and want Copernicus GLO-30 quality (~30 m resolution) with bilinear interpolation for sub-pixel accuracy. It is ideal for GIS enrichment, site assessment, flood modelling, or route profiling workflows where a pay-per-call micro-payment model is acceptable and boundary pre-validation saves unnecessary charges. Prefer alternatives if you need bulk/batch elevation queries, coverage outside Denmark, or a different DEM source such as SRTM.

## Known failure modes

- Coordinate outside Denmark boundary — rejected before payment, returns a validation error
- Latitude or longitude outside the accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude fields — returns a 400-level error
- Service unavailable or upstream DEM data issue — returns a 5xx error

## How this service works

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

## Output

A numeric surface elevation value in metres derived from bilinear interpolation of the Copernicus DEM GLO-30 raster at the requested WGS84 coordinate. The response is returned only if the coordinate falls within the Natural Earth boundary of Denmark; requests outside that 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-nordic-land-denmark-surface-elevation-copernicus-dem-glo-30-9d02f53d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)