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HALOWERK Southern Land – Portugal Local Relief
x402
HALOWERK Southern Land – Portugal Local Relief is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Returns the local relief (difference between maximum and minimum sampled surface elevation) for a coordinate point within Portugal.
Price / call$0.003
Success—
StatusUnknown
How this service works
Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Portugal; results outside it are rejected before payment.
Output
A numeric value representing the local relief in meters — the difference between the maximum and minimum sampled surface elevations within the analysis area around the given coordinate. Coordinates outside Portugal's Natural Earth boundary are rejected before any charge is incurred.
Example use cases
Site suitability for agricultural terracing
“I'm evaluating a plot in the Douro Valley, Portugal, around latitude 41.15 and longitude -7.55. What's the local relief there — how much does the surface elevation vary across that area?”
Terrain roughness for hiking trail planning
“We're planning a hiking trail near Sintra, Portugal. Can you check the local relief at latitude 38.8 and longitude -9.4 to see how rugged the terrain is?”
Flood risk pre-screening for development
“Before we commission a full survey, can you pull the local relief at latitude 37.1, longitude -8.6 in Portugal? I want to know the elevation range to gauge drainage potential.”
Technical details
Endpoint
POSThttps://suedland.halowerk.com/v1/pt-local-reliefWhen to prefer
Use this endpoint when you need a quick, cheap ($0.003/call) scalar measure of terrain variability at a specific point in Portugal. It is ideal for pre-screening land parcels, routing, or environmental analysis workflows where full DEM processing is unnecessary. Prefer this over general elevation APIs when you specifically need the elevation range (relief) rather than a single elevation value, and when the location is within Portugal.
Side effects
- Coordinate outside Portugal's Natural Earth boundary — request rejected with validation error before payment
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed or missing latitude/longitude fields — 400-level error
- Payment failure via x402 protocol — no result returned
- Server-side elevation data unavailable for the requested point — potential 5xx 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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