{"uid":"cap_KzXJbThniNZamATTh6000","slug":"halowerk-baltic-land-lithuania-mean-first-order-surface-gradient-33e33bec","name":"HALOWERK Baltic Land – Lithuania Mean First-Order Surface Gradient","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Lithuania; results outside it are rejected before payment.","url":"https://baltikum.halowerk.com/v1/lt-mean-slope","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_LxuQKgO8UOCYPI4bvQ-k3","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 mean first-order surface slope gradient across an analysis grid for a given coordinate within Lithuania, validated against the Natural Earth boundary.","exampleAgentPrompt":"What is the mean surface slope gradient at latitude 54.6872, longitude 25.2797 in Lithuania? I need the first-order terrain steepness for that point.","exampleUseCases":[{"title":"Agricultural land suitability assessment","prompt":"I'm evaluating farmland near Kaunas — can you get me the mean surface slope gradient at latitude 54.8985, longitude 23.9036 in Lithuania so I can assess how flat the terrain is for tillage?"},{"title":"Infrastructure routing terrain check","prompt":"We're planning a road segment near Šiauliai — what's the mean first-order slope gradient at latitude 55.9349, longitude 23.3137 in Lithuania to understand how challenging the terrain is?"},{"title":"Flood risk terrain profiling","prompt":"For a hydrological model covering wetlands near the Nemunas delta, can you fetch the mean surface slope gradient at latitude 55.2957, longitude 21.4036 in Lithuania?"}],"resultDescription":"A numeric value representing the mean first-order surface slope gradient across the analysis grid cell at the requested coordinate. Coordinates outside the Lithuanian boundary are rejected before payment is processed.","failureModes":["Coordinate outside Lithuania boundary — request rejected before payment, with a boundary validation error","Coordinate outside European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure","Missing or malformed latitude/longitude fields — input validation error","Server-side computation failure for sparse elevation data — internal error response"],"whenToPreferThis":"Use this endpoint when you need the average slope steepness (first-order gradient) at a specific point within Lithuania and want boundary validation before incurring payment costs. Prefer this over maximum-slope or ruggedness endpoints when a smoothed, mean gradient is needed for land suitability, hydrology, or infrastructure planning rather than worst-case terrain values.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:01:16.108Z","isFirstParty":false}