{"uid":"cap_VhHdvjNf5uaobep2TbsVO","slug":"halowerk-atlantic-land-france-surface-ruggedness-standard-deviation-ad5ac583","name":"HALOWERK Atlantic Land – France Surface Ruggedness (Standard Deviation of Elevation)","description":"Standard deviation of sampled surface elevations. The coordinate is validated against the Natural Earth boundary for France; results outside it are rejected before payment.","url":"https://atlantikland.halowerk.com/v1/fr-ruggedness","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_BSRyp533hw9Z-iwEz881f","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 standard deviation of sampled surface elevations (terrain ruggedness index) for a given coordinate within France, validated against Natural Earth boundaries.","exampleAgentPrompt":"What's the terrain ruggedness — standard deviation of surface elevations — at latitude 45.75, longitude 4.85 in France?","exampleUseCases":[{"title":"Construction site terrain assessment","prompt":"I'm evaluating a site near latitude 43.6, longitude 3.9 in southern France — can you tell me how rugged the terrain is there based on surface elevation variability?"},{"title":"Agricultural land suitability screening","prompt":"We're looking at farmland near latitude 47.2, longitude 1.5 in central France. How variable is the surface elevation there — is the land relatively flat or uneven?"},{"title":"Outdoor route planning ruggedness check","prompt":"Before we plan our trail, can you check the terrain ruggedness at latitude 45.9, longitude 6.8 in the French Alps — specifically the standard deviation of surface elevations?"}],"resultDescription":"A numeric value representing the standard deviation of sampled surface elevations at the queried coordinate, indicating terrain ruggedness. Higher values mean more uneven, rough terrain; lower values indicate flatter surfaces. Coordinates outside the Natural Earth boundary for France are rejected before any charge is applied.","failureModes":["Coordinate outside France boundary — request rejected before payment with a validation error","Latitude or longitude outside accepted WGS84 range (34–72.5°N, -31.5–40.5°E) — schema validation error","Payment failure via x402 protocol — request not processed","No elevation data available for the queried point — may return null or an error response"],"whenToPreferThis":"Choose this endpoint when you need a quantitative measure of terrain roughness (elevation standard deviation) for a specific point in France, particularly for land assessment, construction suitability, agricultural screening, or route planning. It is distinct from mean slope (gradient) or runoff tendency endpoints — use it when surface elevation variability itself is the key metric.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T07:02:38.484Z","isFirstParty":false}