# HALOWERK Baltic Land – Surface Aspect (Germany)

> HALOWERK Baltic Land – Surface Aspect (Germany) 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 the circular direction (in degrees, clockwise from north) of the dominant surface gradient at a given WGS84 coordinate within Germany.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-aspect
- 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-surface-aspect-germany-ba0daf81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R1SgliXlzAKZ9Pn3w31--

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-surface-aspect-germany-ba0daf81 -d '<json body>'
```

Example prompt: What direction does the surface slope at 51.3°N, 12.4°E in Germany — give me the aspect angle clockwise from north.

## When to prefer this

Choose this endpoint when you need a precise terrain aspect (slope direction) value for a specific point within Germany, especially for applications like solar site assessment, agricultural drainage planning, ecological habitat modeling, or hillside orientation analysis. It is distinct from slope magnitude endpoints and is validated specifically against Germany's boundary, making it reliable for German land-surface workflows.

## Known failure modes

- Coordinate outside Germany's Natural Earth boundary — request rejected before payment, error returned indicating out-of-bounds
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Flat or near-flat terrain may return undefined or noisy aspect values
- Missing or malformed latitude/longitude — schema validation error
- Network or service unavailability — HTTP 5xx error

## How this service works

Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Germany; results outside it are rejected before payment.

## Output

A numeric value representing the circular direction (in degrees, 0–360, clockwise from north) of the dominant surface gradient at the queried coordinate. A value of 0/360 indicates north-facing, 90 east-facing, 180 south-facing, 270 west-facing. Coordinates outside Germany's Natural Earth 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-baltic-land-surface-aspect-germany-ba0daf81/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)