Skip to content

Instantly share code, notes, and snippets.

@mejackreed
Last active February 8, 2017 19:35
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save mejackreed/c76cf5227f29e8c80c4b8787d71ad006 to your computer and use it in GitHub Desktop.
Save mejackreed/c76cf5227f29e8c80c4b8787d71ad006 to your computer and use it in GitHub Desktop.
Leaflet-IIIF Cropping, restoring from a crop
var baseUrl = 'https://stacks.stanford.edu/image/iiif/hg676jb4964%2F0380_796-44';
var map = L.map('map', {
center: [0, 0],
crs: L.CRS.Simple,
zoom: 0,
});
// Trying to reverse this.
// https://stacks.stanford.edu/image/iiif/hg676jb4964%2F0380_796-44/1949,295,1486,335/full/0/default.jpg
var iiifLayer = L.tileLayer.iiif(baseUrl + '/info.json').addTo(map);
var areaSelect = L.areaSelect({}).addTo(map);
iiifLayer.on('load', function() {
var maxNativeZoom = iiifLayer.maxNativeZoom;
var b = [1949, 295, 1486, 335];
var minPoint = L.point(b[0], b[1]);
var maxPoint = L.point(parseInt(b[0]) + parseInt(b[2]), parseInt(b[1]) + parseInt(b[3]));
var min = map.unproject(minPoint, maxNativeZoom);
var max = map.unproject(maxPoint, maxNativeZoom);
var y = max.lat - min.lat
var x = max.lng - min.lng
// Pop a rectangle on there to show where it goes
L.rectangle(L.latLngBounds(min, max)).addTo(map)
var bounds = L.latLngBounds(min, max);
map.panTo(bounds.getCenter())
areaSelect.setDimensions({
width: Math.round(Math.abs(x)),
height: Math.round(Math.abs(y))
});
});
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.2/dist/leaflet.css" />
<link rel="stylesheet" href="https://rawgit.com/heyman/leaflet-areaselect/master/src/leaflet-areaselect.css" />
<link rel="stylesheet" href="styles.css">
<script src="https://unpkg.com/leaflet@1.0.2/dist/leaflet.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdn.rawgit.com/mejackreed/Leaflet-IIIF/v1.0.1/leaflet-iiif.js"></script>
<script src="https://cdn.rawgit.com/heyman/leaflet-areaselect/da8905695db78354ddd5b5d9de6ef13699b9d7a7/src/leaflet-areaselect.js"></script>
</head>
<body>
<div id="map"></div>
<div id="urlArea"></div>
<script src="app.js"></script>
</body>
</html>
MIT License
Copyright (c) 2017 Jack Reed
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
html, body, #map{
height: 100%;
margin: 0;
}
.leaflet-areaselect-container {
position:absolute;
width:100%;
height:100%;
}
#urlArea {
background-color: rgba(255, 255, 255, 0.5);
font-family: sans-serif;
position: absolute;
top: 0px;
left: 50%;
z-index: 100000;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment