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3857.html
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3857.html
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<!DOCTYPE html>
<html>
<head>
<title>3857.js</title>
<style>
.input-row {
display: flex;
align-items: center;
gap: 10px;
}
.input-row label {
flex: 0 0 120px;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.6.0/proj4.js"></script>
</head>
<body>
<h1>Tile Center Calculator</h1>
<form>
<div class="input-row">
<label for="z-input">Zoom Level (z):</label>
<input
type="number"
id="z-input"
placeholder="Enter zoom level"
required
/>
<label for="x-input">x-id:</label>
<input type="number" id="x-input" placeholder="Enter x-id" required />
<label for="y-input">y-id:</label>
<input type="number" id="y-input" placeholder="Enter y-id" required />
</div>
<button type="button" id="calc-button">Calculate</button>
</form>
<div id="result-container"></div>
<script src="3857.js"></script>
</body>
</html>