{"uid":"cap_jQaGZHrfNdT9QLW342Q8J","slug":"halowerk-southern-land-greece-aspect-surface-gradient-direction-15094d04","name":"HALOWERK Southern Land – Greece Aspect (Surface Gradient Direction)","description":"Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Greece; results outside it are rejected before payment.","url":"https://suedland.halowerk.com/v1/gr-aspect","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"latitude":{"type":"number","maximum":72.5,"minimum":34,"description":"WGS84 latitude inside the published European coverage."},"longitude":{"type":"number","maximum":40.5,"minimum":-31.5,"description":"WGS84 longitude inside the published European coverage."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4WfT5-4nOpCx1PzO6y_sm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the circular direction of the dominant surface gradient (aspect) in degrees clockwise from north for a given coordinate within Greece.","exampleAgentPrompt":"What direction does the hillside face at latitude 37.98 and longitude 23.73 in Greece — give me the dominant surface gradient direction clockwise from north.","exampleUseCases":[{"title":"Solar panel orientation planning","prompt":"I'm siting a solar installation near Thessaloniki — can you tell me the terrain aspect at latitude 40.63, longitude 22.94 so I know which direction the slope faces?"},{"title":"Agricultural erosion risk assessment","prompt":"For a farm plot at latitude 38.25, longitude 21.74 in Greece, what direction is the dominant surface slope facing? I need to plan irrigation channels correctly."},{"title":"Hiking trail terrain analysis","prompt":"We're planning a trail segment in the Peloponnese near latitude 37.50, longitude 22.35 — what direction does the hillside face there so we can assess sun exposure?"}],"resultDescription":"A single numeric value representing the aspect in degrees (0–360, clockwise from north) of the dominant surface gradient at the requested coordinate. Coordinates outside the Greece boundary are rejected before any charge is applied.","failureModes":["Coordinate outside Greece boundary returns a rejection error (no charge applied)","Latitude or longitude outside the published WGS84 coverage range returns a validation error","Invalid or missing coordinate fields return a schema validation error","Payment failure via x402 protocol prevents the call from completing"],"whenToPreferThis":"Choose this endpoint when you need the slope-facing direction (aspect) specifically for a point in Greece, validated against the Natural Earth boundary. It is purpose-built for Greek terrain and rejects out-of-bounds coordinates before billing, making it safe for automated pipelines. Use it over generic DEM APIs when you need guaranteed geographic constraint and per-call micropayment pricing via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:14:14.889Z","isFirstParty":false}