# HALOWERK Land Compare – Local Background Deviation vs Local Relief

> HALOWERK Land Compare – Local Background Deviation vs Local Relief is a paid API for AI agents from landvergleich.halowerk.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Compares a 60-metre site-scale local relief measurement against a 1,000-metre local background measurement for the same European coordinate and returns the signed deviation between the two.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-local-relief
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-land-compare-local-background-deviation-vs-local-relief-14a18210
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uqqHmQBa-GylpOg0R9bg_

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-land-compare-local-background-deviation-vs-local-relief-14a18210 -d '<json body>'
```

Example prompt: What's the difference between the local 60-metre relief and the 1,000-metre background relief at latitude 48.8566, longitude 2.3522? I want to know how much this Paris location's fine-scale terrain stands out from its regional surroundings.

## When to prefer this

Choose this endpoint when you need a precise, quantitative comparison of site-scale (60m) terrain relief against regional (1km) background for a specific European location — particularly useful for site suitability analysis, ecological assessments, flood risk studies, or any workflow requiring topographic prominence context. It is distinct from endpoints that compare two geographic sites against each other; this one computes intra-site scale contrast.

## Known failure modes

- Coordinates outside the European coverage area (lat 34–72.5, lon -31.5–40.5) will be rejected
- Invalid or missing latitude/longitude values return a validation error
- Payment failure via x402 protocol prevents the call from completing
- Extremely flat areas may return near-zero deviations with limited discriminatory power

## How this service works

Compares the 60 metre site measurement for local relief with a 1,000 metre local background measured from the same source and reports the deviation.

## Output

Returns the signed numerical deviation between the 60-metre local relief measurement and the 1,000-metre local background relief for the given European coordinate, indicating whether the site stands above or below its regional topographic context.

## 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-land-compare-local-background-deviation-vs-local-relief-14a18210/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from landvergleich.halowerk.com](https://www.zero.xyz/host/landvergleich.halowerk.com/llms.txt)