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The mark is a quantized climb through the temperature-band tokens (cold -> cool -> normal -> warm -> hot -> very-hot) to a rec-hot terminal at a dashed record line, on the dark rounded tile. - favicon.svg (canonical) + favicon-16/32/48.png fallbacks; the 16px raster drops the whisper strata and record dash so the climb survives - apple-touch-icon.png 180 rendered edge-to-edge (iOS supplies rounding) - maskable 192/512 scale the artwork 0.78 about center so every element clears the 40%-radius circular safe zone; any-purpose 192/512 and the 512 OG logo.png regenerated; reused filenames cache-busted with ?v=2 - header lockup: inline glyph referencing var(--cold) etc so a palette change propagates, beside a lowercase 650-weight wordmark - PNGs are palette-quantized with the band/chrome hexes pinned exact; full asset set is ~20 KB Claude-Session: https://claude.ai/code/session_01KdTZCjpLeD26ZbXe6ApjpR
113 lines
7.1 KiB
HTML
113 lines
7.1 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>Thermograph — reading the grades</title>
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<meta name="description" content="How Thermograph grades weather: percentiles of a location's own ±7-day seasonal history, the scale from Below Normal to Near Record, and what every metric means." />
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<meta name="theme-color" content="#f0803c" />
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<!-- Link previews (Discord, Slack, iMessage…). The server fills the og:url /
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og:image origins in from this request's scheme://host + base path —
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crawlers need absolute URLs and don't run JS. -->
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<meta property="og:type" content="website" />
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<meta property="og:site_name" content="Thermograph" />
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<meta property="og:title" content="Thermograph — reading the grades" />
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<meta property="og:description" content="How Thermograph grades weather: percentiles of a location's own ±7-day seasonal history, the scale from Below Normal to Near Record, and what every metric means." />
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<meta property="og:url" content="__ORIGIN__/legend" />
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<meta property="og:image" content="__ORIGIN__/logo.png?v=2" />
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<meta property="og:image:width" content="512" />
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<meta property="og:image:height" content="512" />
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<meta property="og:image:alt" content="Thermograph logo" />
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<meta name="twitter:card" content="summary" />
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<link rel="canonical" href="__ORIGIN__/legend" />
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<link rel="icon" href="favicon.svg" type="image/svg+xml" />
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<link rel="icon" href="favicon-48.png" type="image/png" sizes="48x48" />
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<link rel="icon" href="favicon-32.png" type="image/png" sizes="32x32" />
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<link rel="icon" href="favicon-16.png" type="image/png" sizes="16x16" />
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<link rel="apple-touch-icon" href="apple-touch-icon.png" />
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<link rel="manifest" href="manifest.webmanifest" />
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<link rel="stylesheet" href="style.css" />
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</head>
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<body>
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<header>
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<div class="brand">
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<span class="logo"><svg viewBox="0 0 512 512" width="28" height="28" aria-hidden="true"><rect x="32" y="32" width="448" height="448" rx="96" fill="#10141B" stroke="#fff" stroke-opacity=".08" stroke-width="4"/><rect x="64" y="170" width="384" height="48" rx="8" fill="#27131C"/><rect x="64" y="222" width="384" height="48" rx="8" fill="#38322E"/><rect x="64" y="274" width="384" height="48" rx="8" fill="#1A2D27"/><rect x="64" y="326" width="384" height="48" rx="8" fill="#26333F"/><rect x="64" y="378" width="384" height="48" rx="8" fill="#18293A"/><line x1="64" y1="132" x2="448" y2="132" stroke="#46586E" stroke-width="8" stroke-dasharray="26 20"/><path d="M64 410H126V386H160" fill="none" stroke="var(--cold)" stroke-width="34"/><path d="M160 403V352H244V368H282" fill="none" stroke="var(--cool)" stroke-width="34"/><path d="M282 385V320H312" fill="none" stroke="var(--normal)" stroke-width="34"/><path d="M312 337V248H338" fill="none" stroke="var(--warm)" stroke-width="34"/><path d="M338 265V196H366" fill="none" stroke="var(--hot)" stroke-width="34"/><path d="M366 213V132H396" fill="none" stroke="var(--very-hot)" stroke-width="34"/><rect x="382" y="100" width="64" height="64" rx="12" fill="var(--rec-hot)" stroke="#10141B" stroke-width="12"/></svg></span>
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<div>
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<h1>Thermograph · Guide</h1>
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<p class="tag">What the metrics and percentile grades mean</p>
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</div>
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<details class="nav-menu">
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<summary class="nav-toggle" aria-label="Menu"><svg viewBox="0 0 24 24" width="22" height="22" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"><path d="M4 7h16M4 12h16M4 17h16"/></svg></summary>
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<div class="nav-panel">
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<nav class="view-nav" aria-label="Views">
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<a href="./" data-view="map">Weekly</a>
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<a href="calendar" data-view="calendar">Calendar</a>
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<a href="day" data-view="day">Day Detail</a>
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<a href="compare" data-view="compare">Compare</a>
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<a href="climate">Climate</a>
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<a href="alerts">Alerts</a>
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</nav>
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</div>
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</details>
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</div>
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</header>
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<main class="guide">
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<section class="guide-block">
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<h2>How the grades work</h2>
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<p>Every grade is <b>relative to this place's own climate history</b>, not an absolute
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temperature. For each day Thermograph builds a ±7-day seasonal distribution from
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decades of local records, then reports the <b>percentile</b> where the day falls in it.</p>
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<p>So a 60° day can be “Above Normal” in one place or season and
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“Below Normal” in another. That's why the categories read
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“Above/Below Normal”, “High/Low”, and “Near Record” —
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never “hot” or “cold”.</p>
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</section>
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<section class="guide-block">
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<h2>Grade scale — percentile of the local ±7-day history</h2>
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<div class="guide-scale" id="temp-scale"></div>
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</section>
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<section class="guide-block">
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<h2>Rain intensity — percentile among rain days</h2>
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<p class="muted">Precipitation is graded only across days that actually saw rain, so
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“Heavy” means heavy <i>for a rainy day here</i>. Dry days are colored by
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their dry streak instead (below).</p>
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<div class="guide-scale" id="rain-scale"></div>
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</section>
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<section class="guide-block">
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<h2>The metrics</h2>
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<dl class="guide-metrics">
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<dt>High / Low</dt><dd>The day's highest and lowest air temperature (°F).</dd>
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<dt>Feels</dt><dd>Apparent temperature — what the air actually felt like once humidity
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and wind are factored in, taking whichever apparent extreme (heat-index high or
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wind-chill low) sits further from a temperate baseline, graded against its own history.</dd>
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<dt>Humid</dt><dd>Absolute humidity: grams of water vapor per cubic meter of air (g/m³).</dd>
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<dt>Wind</dt><dd>Average sustained wind speed (mph).</dd>
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<dt>Gust</dt><dd>Peak wind gust for the day (mph).</dd>
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<dt>Precip</dt><dd>Total precipitation (inches), graded by intensity among rain days.</dd>
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<dt>Dry streak</dt><dd>Consecutive days since the last measurable rain — the color deepens
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the longer it's been dry, and resets to blue on a rain day.</dd>
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</dl>
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</section>
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<p class="guide-back"><a href="./">← Back to Thermograph</a></p>
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</main>
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<script type="module">
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import "./nav.js"; // header view-links follow the last location
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import "./units.js"; // the °F/°C toggle
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import "./account.js"; // header sign-in entry + notification bell
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// The scale rows come from the shared tier tables, so this guide can't
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// drift from what the app actually shows.
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import { SCALE_TEMP, SCALE_RAIN } from "./shared.js";
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const row = ({ c, label, range }) =>
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`<div class="guide-seg"><span class="guide-sw" style="background:var(--${c})"></span>` +
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`<span class="guide-lbl">${label}</span><span class="guide-rng">${range}</span></div>`;
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document.getElementById("temp-scale").innerHTML = SCALE_TEMP.map(row).join("");
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document.getElementById("rain-scale").innerHTML = SCALE_RAIN.map(row).join("");
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</script>
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</body>
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</html>
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