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HALOWERK Europe Land – Aspect (Parcel Polygon)
x402
HALOWERK Europe Land – Aspect (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 dominant surface aspect (circular direction of steepest downhill gradient, clockwise from north) for a user-supplied WGS84 polygon parcel across 30 European countries.
Price / call$0.006
Success—
StatusUnknown
How this service works
Circular direction of the dominant surface gradient, clockwise from north. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.
Output
A standardized numeric value representing the dominant surface aspect of the supplied polygon, expressed as degrees clockwise from north (0–360°), consistent across all 30 covered European countries. The response reflects the prevailing gradient direction averaged or derived over the parcel area.
Example use cases
Solar farm suitability screening
“I'm evaluating a candidate site for a solar installation near Lyon, France. The parcel corners are approximately [4.80, 45.72], [4.83, 45.72], [4.83, 45.70], [4.80, 45.70]. Can you tell me the dominant aspect direction so I can judge if it gets good southward sun exposure?”
Vineyard terroir assessment
“We're looking at a vineyard plot in the Douro Valley, Portugal. The polygon vertices are [7.58, 41.12], [7.60, 41.12], [7.60, 41.10], [7.58, 41.10]. What is the dominant slope-facing direction of this parcel, in degrees clockwise from north?”
Flood risk terrain orientation check
“For this agricultural land parcel in the Po Valley, Italy – coordinates [11.30, 44.95], [11.34, 44.95], [11.34, 44.93], [11.30, 44.93] – what direction does the terrain gradient face? I need to understand water runoff direction for a drainage planning report.”
Technical details
Endpoint
POSThttps://euroland.halowerk.com/v1/europe-aspect-parcelWhen to prefer
Choose this endpoint when you need terrain aspect (slope-facing direction) for a specific bounded land parcel in Europe and require a consistent, standardized output across 30 countries. Prefer it over general GIS APIs when you need parcel-level polygon input rather than a point query, and when you want a ready-to-use numeric bearing rather than raw DEM data you must process yourself. Especially useful for agricultural, solar energy, viticulture, environmental, and real estate workflows that need terrain orientation as an input feature.
Side effects
- Polygon outside covered European extent (coordinates outside lat 34–72.5°N, lon -31.5–40.5°E) returns an error or empty result
- Polygon with fewer than 3 vertices rejected as invalid
- Polygon spanning more than 0.25 degrees in any direction returns a validation error
- Malformed coordinate array (wrong nesting, non-numeric values) returns a schema error
- Payment/authorization failure via x402 protocol results in 402 response with no data
- Very flat terrain may return low-confidence or uniform aspect values
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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