2026-02-20 20:10:03 -05:00
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<!DOCTYPE html>
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<head>
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<title>Radio Freq Visualizer</title>
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<script src="js/data.js"></script>
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=Jost:ital,wght@0,100..900;1,100..900&display=swap"
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rel="stylesheet">
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<link
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href="https://fonts.googleapis.com/css2?family=Bodoni+Moda:ital,opsz,wght@0,6..96,400..900;1,6..96,400..900&family=Jost:ital,wght@0,100..900;1,100..900&display=swap"
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rel="stylesheet">
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<link rel="stylesheet" href="default.css" />
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</head>
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<body>
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<h1>Interactive Canadian Radio Frequency Allocation</h1>
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<label for="min_freq">Frequency</label>
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<input type="range" id="min_freq" min="0" max="25670" />
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<input type="range" id="max_freq" min="1" max="25670" />
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<div id="content"></div>
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<script>
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let content = document.getElementById("content");
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2026-02-20 20:23:18 -05:00
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data = data.slice(1, -1);
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2026-02-20 20:10:03 -05:00
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console.log(data);
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let service_cats = {};
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let min_freq = 9999999;
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let max_freq = 0;
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2026-02-20 20:23:18 -05:00
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let current_scale = 50000;
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2026-02-20 20:10:03 -05:00
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let i = 0;
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let str = "";
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for (let entry of data) {
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i++;
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2026-02-20 20:10:03 -05:00
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let services = [];
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for (service_name in entry.primary) {
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let service_slug = service_name.replaceAll(' ', '_');
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if (service_cats[service_slug] == null) {
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service_cats[service_slug] = 0;
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}
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service_cats[service_slug]++;
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let service_span = document.createElement("span");
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service_span.className = service_slug;
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service_span.innerHTML = service_name;
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services.push(service_span);
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}
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let hi_freq = entry.maxf;
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let low_freq = entry.minf;
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min_freq = Math.min(min_freq, low_freq);
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max_freq = Math.max(max_freq, hi_freq);
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let range = hi_freq - low_freq;
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2026-02-20 20:23:18 -05:00
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if (range < current_scale) {
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continue;
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}
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let ci = i * 6.28 / data.length;
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let r = Math.sin(ci) * 64 + 127;
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let g = Math.sin(ci + 2) * 64 + 127;
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let b = Math.sin(ci + 4) * 64 + 127;
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let color = `rgb(${r}, ${g}, ${b})`;
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let container = document.createElement('div');
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container.style.height = range / current_scale + 'px';
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container.style.backgroundColor = color;
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container.className = "freq-entry";
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let freq_range_span = document.createElement('span');
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freq_range_span.innerHTML = `${low_freq} → ${hi_freq}`;
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container.appendChild(freq_range_span);
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for (let s of services) {
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container.appendChild(s);
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}
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content.appendChild(container);
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}
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let max_min = document.createElement('div');
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max_min.innerHTML = min_freq + "kHz to " + max_freq + "kHz";
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content.prepend(max_min);
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let categories = document.createElement('div');
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for (let service in service_cats) {
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let span = document.createElement('span');
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span.className = service;
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span.innerHTML = service.replaceAll('_', ' ');
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categories.appendChild(span);
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}
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content.prepend(categories);
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// find all elements tagged with service cats and replace them with cat{x}
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// for styling
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console.log(service_cats);
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let current_cat = 1;
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for (let service in service_cats) {
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console.log(`Searching for elements with ${service}`);
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let elems = [...document.getElementsByClassName(service)];
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console.log(elems);
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for (let elem of elems) {
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console.log(`Removing ${service} from ${elem}`)
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console.log(elem);
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elem.classList.remove(service);
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elem.classList.add("cat" + current_cat);
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}
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current_cat = (current_cat + 1) % 3 + 1;
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}
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</script>
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</body>
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</html>
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