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index.html
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<!doctype html>
<!--
Tangram: real-time WebGL rendering for OpenStreetMap
http://github.com/tangrams/tangram
http://mapzen.com
-->
<html lang="en-us">
<head>
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Tangram Heightmapper</title>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" />
<style>
body {
margin: 0px;
border: 0px;
padding: 0px;
}
#map {
background: rgba(0, 0, 0, 0);
height: 100%;
width: 100%;
position: absolute;
z-index: 0;
}
#help-wrapper, #new-wrapper {
visibility: hidden;
position: absolute;
width: 100%;
z-index: 3001;
background-color: grey;
top: 10%;
height: 90%;
}
#help-blocker {
visibility: hidden;
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: 3000;
background-color: #666;
opacity: .5;
content: ' ';
}
#help, #new {
visibility: hidden;
position: relative;
max-width: 600px;
margin: 0 auto;
background-color: #666;
color: white;
padding: 5%;
font-family: verdana, sans-serif;
font-size: 12pt;
max-height: 60%;
overflow: scroll;
border: 2px solid white;
}
#help a{
color: #ddd;
}
.mz-bug-container {
display: none;
}
::-webkit-scrollbar {
-webkit-appearance: none;
width: 7px;
}
::-webkit-scrollbar-thumb {
border-radius: 4px;
background-color: rgba(0,0,0,.5);
-webkit-box-shadow: 0 0 1px rgba(255,255,255,.5);
}
</style>
</head>
<body>
<div id="new-wrapper">
<div id="new">
<ul>
<li><span style="color: #ee0000">NEW!</span> Enter your API key in the field provided to load terrain imagery past zoom level 3. <a style="color: #ee0000" href="http://mapzen.com/developers">Get your free API key here!</a></li>
</ul>
</div>
</div>
<div id="help-wrapper">
<div id="help">
<p>
<a href="https://mapzen.com/products/tangram/">Tangram</a> Heightmapper
</p>
<p>
This is an elevation data browser, which "auto-exposes" the display so that the highest and lowest visible elevations are white and black. The result is a grayscale heightmap, suitable for use as a displacement map in 3D applications.</p>
<p><a href="https://mapzen.com/blog/tangram-heightmapper/" target="_blank">Here's a blog post about this tool</a>, with more explanations and examples!</p>
<p>Usage:
<ul>
<li>Uncheck "auto-expose" to set min and max height levels manually.</li>
<li>Click "export" to open the current view as an image in a new tab - then "Save As" to save the image to disk. (You may need to right-click the image to do this.)</li>
<li>Import the resulting image as a displacement map in a 3D application to generate a 3D model of the terrain. (<a href="https://github.com/tangrams/heightmapper/blob/master/exporting_to_blender.md" target="_blank">Here's a tutorial for doing this in Blender</a>.)</li>
<li>The "z:x scale factor" describes how "high" the current view is, on the z-axis, in terms of how wide the current view is on the x-axis. Multiplying this scale factor by the width of a 3D mesh in units x will tell you how high in units z your mesh should be after displacement in order to be true-scale.</li>
<li>Press the 'h' key to toggle interface visibility.</li>
</ul>
</p>
<p>Terrain data is coming from <a href="http://mapzen.com" target="_blank">Mapzen</a>'s <a href="https://mapzen.com/blog/elevation/" target="_blank">global terrain tiles</a>.</p>
<p>Check out the code or fork this project on <a href="https://github.com/tangrams/heightmapper" target="_blank">Github</a>!</p>
</div>
</div>
<div id="help-blocker"></div>
<div id="map"></div>
<!-- 3rd party libraries -->
<script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>
<!-- bog-standard leaflet URL hash -->
<script src="lib/leaflet-hash.js"></script>
<!-- A lightweight graphical user interface for changing variables in JavaScript. -->
<script src="lib/dat.gui.min.js"></script>
<!-- https://github.com/eligrey/FileSaver.js -->
<script src="lib/FileSaver.js"></script>
<!-- End of 3rd party libraries -->
<!-- Main tangram library -->
<script src="lib/tangram.min.js"></script>
<!-- Demo module -->
<script src="main.js"></script>
</body>
</html>