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HALOWERK Eastern Land – Bulgaria Terrain Aspect
x402
HALOWERK Eastern Land – Bulgaria Terrain Aspect is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Returns the circular direction of the dominant surface gradient (aspect) at a given coordinate, clockwise from north, validated against Bulgaria's boundary.
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 Bulgaria; results outside it are rejected before payment.
Output
A numeric value representing the clockwise angle in degrees from north (0–360) indicating the direction of the dominant surface gradient at the queried coordinate. Points outside Bulgaria's Natural Earth boundary are rejected before any charge is applied.
Example use cases
Solar panel site suitability assessment
“I'm evaluating a plot of land in Bulgaria at 42.45 latitude, 25.10 longitude for solar panel installation — can you tell me what direction the slope faces so I know if it gets good southern exposure?”
Agricultural terracing slope orientation
“For a farm parcel in Bulgaria at coordinates 41.88 north, 23.60 east, what is the aspect of the dominant slope? I need to know which way the land faces to plan irrigation and crop rows.”
Hiking trail slope direction analysis
“I'm planning a hiking route through the Rhodope Mountains in Bulgaria — what is the terrain aspect at 41.65 latitude, 24.35 longitude, measured clockwise from north?”
Technical details
Endpoint
POSThttps://ostland.halowerk.com/v1/bg-aspectWhen to prefer
Choose this endpoint when you need terrain aspect (slope-facing direction) specifically for coordinates within Bulgaria, and want boundary validation before incurring payment. Prefer this over generic DEM APIs when you need a lightweight, pay-per-call micro-service focused on Bulgarian land coverage with built-in coordinate validation.
Side effects
- Coordinate outside Bulgaria's Natural Earth boundary — request rejected with error before payment
- Latitude or longitude out of the accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate fields — schema validation failure
- No terrain data available for the given coordinate — possible no-data response
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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