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HALOWERK Europe Land – Local Relief (Parcel Polygon)
x402
HALOWERK Europe Land – Local Relief (Parcel Polygon) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).
Returns the local relief (difference between maximum and minimum surface elevation) for a caller-supplied polygon parcel across 30 European countries.
Price / call$0.006
Success—
StatusUnknown
How this service works
Difference between maximum and minimum sampled surface elevation. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.
Output
A numeric local relief value representing the difference between the maximum and minimum sampled surface elevation within the supplied polygon, expressed in standardized units, covering any of the 30 supported European countries.
Example use cases
Agricultural land slope assessment
“I need to know how much the elevation varies across this farm plot in Bavaria — the parcel runs between coordinates [11.40, 48.10], [11.42, 48.10], [11.42, 48.12], [11.40, 48.12]. Can you give me the local relief?”
Site suitability check for solar installation
“Before we approve a solar farm in southern Spain, I need to check how rugged the terrain is inside the proposed site boundary: [−3.70, 37.90], [−3.68, 37.90], [−3.68, 37.92], [−3.70, 37.92]. What's the elevation range across that polygon?”
Real estate terrain due diligence
“We're evaluating a land parcel in Poland near Kraków for a development project — coordinates are [19.94, 50.06], [19.96, 50.06], [19.96, 50.08], [19.94, 50.08]. What's the local relief so we can assess how flat or hilly the site is?”
Technical details
Endpoint
POSThttps://euroland.halowerk.com/v1/europe-local-relief-parcelWhen to prefer
Use this endpoint when you need the terrain roughness or elevation variability (local relief) for a specific polygon-defined parcel within Europe, as opposed to a fixed-radius circular buffer or a point lookup. It is ideal for land assessment, agricultural planning, solar/wind site suitability, and real-estate due diligence workflows where the parcel boundary is already known.
Side effects
- Polygon spans more than 0.25 degrees — request rejected with validation error
- Fewer than 3 coordinate pairs supplied — schema validation failure
- Coordinates fall outside covered European extent (lon −31.5 to 40.5, lat 34 to 72.5) — out-of-coverage error
- Malformed coordinate array (wrong nesting or type) — 400 bad request
- Payment not attached or insufficient USDC — 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| polygon | array | WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees. |
Tags
x402
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