Irrigation Design API
Irrigation-design maths as an API, computed locally and deterministically — the sprinkler numbers a landscaper, irrigation tech or gardener sizes a system with. The precip-rate endpoint gives the precipitation rate in inches per hour from the flow and spacing: PR = 96.25 × GPM per head ÷ the area each head waters (head spacing × row spacing in feet), where 96.25 is the in/hr one gallon-per-minute makes over a square foot — three-GPM heads on a 15 × 15 ft grid lay down about 1.28 in/hr. The runtime endpoint turns a target water depth into a run-time: depth ÷ precipitation rate, divided by the system efficiency because no system is perfectly even, so applying a half-inch at 1.28 in/hr takes about 23 minutes at full efficiency, longer with real-world uniformity. The zone endpoint sizes a valve zone: maximum heads = available flow ÷ each head's GPM, rounded down so you never starve the line — 13 GPM drives five 2.6-GPM heads with nothing to spare. Everything is computed locally and deterministically, so it is instant and private. Ideal for irrigation and landscaping apps, sprinkler-design and contractor tools, smart-controller schedulers, and garden-planning sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. For evapotranspiration or weather use a weather API; for material volume use a mulch API.
api.oanor.com/irrigation-api
