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HALOWERK Nordic Land – Surface Aspect (Dominant Gradient Direction)
x402
HALOWERK Nordic Land – Surface Aspect (Dominant Gradient Direction) is a paid API for AI agents from nordland.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 for a given coordinate within Norway.
Price / call$0.003
Success—
StatusUnknown
How this service works
Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Norway; results outside it are rejected before payment.
Output
A numeric value representing the dominant surface gradient direction in degrees, measured clockwise from north (0°=North, 90°=East, 180°=South, 270°=West), for the queried coordinate within Norway. Coordinates outside Norway's Natural Earth boundary are rejected before payment is processed.
Example use cases
Solar panel site suitability assessment
“I'm evaluating a potential solar installation site at 59.9 degrees north, 10.7 degrees east in Norway — can you tell me which direction the terrain faces there so I know if it gets good south-facing sun exposure?”
Avalanche risk terrain classification
“For a mountain rescue planning project, I need the dominant slope aspect at latitude 68.4, longitude 17.8 in Norway — which direction does the surface gradient point, clockwise from north?”
Agricultural microclimate analysis
“I'm studying microclimate conditions for a farm at 63.1°N, 9.4°E in Norway. What is the aspect angle of the terrain there — I need to know which direction the slope faces to model frost risk.”
Technical details
Endpoint
POSThttps://nordland.halowerk.com/v1/no-aspectWhen to prefer
Choose this endpoint when you need terrain aspect (slope-facing direction) specifically for coordinates within Norway and want pre-payment boundary validation to avoid wasted charges. It is part of a suite of Norwegian land-surface endpoints (soil, slope, texture) from the same provider, making it ideal when you are already using sibling endpoints from HALOWERK Nordic Land for multi-layer terrain analysis.
Side effects
- Coordinate outside Norway's Natural Earth boundary — request rejected before payment, error returned indicating out-of-coverage area
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Flat terrain with no discernible gradient — may return null or a sentinel value
- Network timeout or service unavailability — generic 5xx error
- Malformed JSON body — 400 validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| latitude | number | WGS84 latitude inside the published European coverage. |
| longitude | number | WGS84 longitude inside the published European coverage. |
Tags
x402
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