# HALOWERK Baltic Land – Latvia Surface Elevation (Copernicus DEM GLO-30)

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

Returns a bilinearly interpolated surface elevation value for a WGS84 coordinate within Latvia, sourced from the Copernicus DEM GLO-30 dataset.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lv-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-baltic-land-latvia-surface-elevation-copernicus-dem-glo-30-59e949d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qqzdZiczrqLdx4gEW8CQJ

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-baltic-land-latvia-surface-elevation-copernicus-dem-glo-30-59e949d4 -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 56.9460, longitude 24.1059 in Latvia according to the Copernicus DEM GLO-30 data?

## When to prefer this

Choose this endpoint when you need high-resolution (GLO-30, ~30 m) bilinearly interpolated terrain elevation specifically for coordinates within Latvia. It is ideal when you want boundary-validated results (coordinates outside Latvia are rejected before billing), making it safe and cost-efficient for Latvian-scoped geospatial pipelines. Prefer it over generic global DEM APIs when your workflow is Latvia-specific and you want a pay-per-call micro-pricing model via x402.

## Known failure modes

- Coordinate outside Latvia boundary — rejected before payment with a boundary validation error
- Coordinate within European coverage bounds but outside Latvia — rejected by Natural Earth boundary check
- Malformed or out-of-range latitude/longitude values — input validation error
- Service unavailable or upstream DEM data access failure — server error response

## How this service works

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

## Output

A single bilinearly interpolated surface elevation value in meters for the requested WGS84 coordinate, derived from the Copernicus DEM GLO-30 30-meter resolution dataset. The coordinate is pre-validated against Latvia's Natural Earth boundary; requests outside Latvia 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-baltic-land-latvia-surface-elevation-copernicus-dem-glo-30-59e949d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)