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Tide · reads the waterline

Coastal hazard, decomposed and confidence-scored

Tide decomposes distance-to-coast into open ocean, tidal water, and inland water; reads elevation, FEMA flood zones, and SLOSH surge; and detects barrier-island exposure — every field carrying its source, resolution, and a propagated confidence score.

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What it reads

Decomposed distance

Miami Beach and Brickell sit a similar distance from water — and carry wildly different surge risk. Tide separates open-ocean, tidal, and inland water distance because the peril does.

Barrier-island detection

No authoritative national barrier-island dataset exists. Tide derives an on / sheltered-behind / none flag from hydrography, shoreline topology, and elevation signatures.

Provenance on every field

Each output carries its data source, resolution, and a confidence score propagated from geocode quality through every derived layer. Underwriters see exactly what to trust.

Regime-aware surge

A hazard-regime classifier (Atlantic/Gulf, Pacific, Great Lakes, inland) nulls surge where it cannot apply, instead of reporting zeroes that look like data.

How it works

  1. 1

    Pin the property

    An address geocodes against the Census benchmark — or bring your own rooftop coordinates. Geocode quality becomes the base of every confidence score downstream.

  2. 2

    Decompose the water

    Distance computes separately to open ocean, tidal water, and inland water from NOAA shoreline and USGS hydrography — because a barrier island and a riverbank are different perils at the same distance.

  3. 3

    Read the layers

    NAVD88 elevation, FEMA flood zone and BFE, SLOSH surge category and depth, levee accreditation, and a derived barrier-island flag — each tagged with source and resolution.

  4. 4

    Score the trust

    Confidence propagates from geocode quality through every layer, with boundary-ambiguity penalties near zone edges. Underwriter-readable flags explain what the numbers mean.

See Tide read a real schedule.

The live demo runs the production engine — instant showcase scenarios, plus your own addresses if you have demo credentials.

Open the live demo