diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index 49fbc1e9..33e26d72 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -59,6 +59,8 @@ $.IIIFTileSource = function( options ){
 
     this.tileFormat = this.tileFormat || 'jpg';
 
+    this.version = options.version;
+
     // N.B. 2.0 renamed scale_factors to scaleFactors
     if ( this.tile_width && this.tile_height ) {
         options.tileWidth = this.tile_width;
@@ -88,7 +90,7 @@ $.IIIFTileSource = function( options ){
                 }
             }
         }
-    } else if ( canBeTiled(options.profile) ) {
+    } else if ( canBeTiled(options) ) {
         // use the largest of tileOptions that is smaller than the short dimension
         var shortDim = Math.min( this.height, this.width ),
             tileOptions = [256, 512, 1024],
@@ -201,11 +203,42 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
             var options = configureFromXml10( data );
             options['@context'] = "http://iiif.io/api/image/1.0/context.json";
             options['@id'] = url.replace('/info.xml', '');
+            options.version = 1;
             return options;
         } else {
             if ( !data['@context'] ) {
                 data['@context'] = 'http://iiif.io/api/image/1.0/context.json';
                 data['@id'] = url.replace('/info.json', '');
+                data.version = 1;
+            } else {
+                var context = data['@context'];
+                if (Array.isArray(context)) {
+                    for (var i = 0; i < context.length; i++) {
+                        if (typeof context[i] === 'string' &&
+                            ( /^http:\/\/iiif\.io\/api\/image\/[0-2]\/context\.json$/.test(context[i]) ||
+                            context[i] === 'http://library.stanford.edu/iiif/image-api/1.1/context.json' ) ) {
+                            context = context[i];
+                            break;
+                        }
+                    }
+                }
+                switch (data['@context']) {
+                    case 'http://iiif.io/api/image/1/context.json':
+                    case 'http://library.stanford.edu/iiif/image-api/1.1/context.json':
+                        data.version = 1;
+                        break;
+                    case 'http://iiif.io/api/image/2/context.json':
+                        data.version = 2;
+                        break;
+                    case 'http://iiif.io/api/image/3/context.json':
+                        data.version = 3;
+                        break;
+                    default:
+                        // unexpected context
+                }
+            }
+            if ( !data['@id'] && data['id'] ) {
+                data['@id'] = data['id'];
             }
             if(data.preferredFormats) {
                 for (var f = 0; f < data.preferredFormats.length; f++ ) {
@@ -350,25 +383,22 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
             iiifTileH,
             iiifSize,
             iiifSizeW,
+            iiifSizeH,
             iiifQuality,
-            uri,
-            isv1;
+            uri;
 
         tileWidth = this.getTileWidth(level);
         tileHeight = this.getTileHeight(level);
         iiifTileSizeWidth = Math.ceil( tileWidth / scale );
         iiifTileSizeHeight = Math.ceil( tileHeight / scale );
-        isv1 = ( this['@context'].indexOf('/1.0/context.json') > -1 ||
-             this['@context'].indexOf('/1.1/context.json') > -1 ||
-             this['@context'].indexOf('/1/context.json') > -1 );
-        if (isv1) {
+        if (this.version === 1) {
             iiifQuality = "native." + this.tileFormat;
         } else {
             iiifQuality = "default." + this.tileFormat;
         }
         if ( levelWidth < tileWidth && levelHeight < tileHeight ){
-            if ( isv1 || levelWidth !== this.width ) {
-                iiifSize = levelWidth + ",";
+            if ( this.version === 1 || levelWidth !== this.width ) {
+                iiifSize = levelWidth + "," + ( this.version === 3 ? levelHeight : "" );
             } else {
                 iiifSize = "max";
             }
@@ -384,10 +414,11 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
                 iiifRegion = [ iiifTileX, iiifTileY, iiifTileW, iiifTileH ].join( ',' );
             }
             iiifSizeW = Math.ceil( iiifTileW * scale );
-            if ( (!isv1) && iiifSizeW === this.width ) {
+            iiifSizeH = Math.ceil( iiifTileH * scale );
+            if ( this.version !== 1 && iiifSizeW === this.width && ( this.version !== 3 || iiifSizeH === this.height ) ) {
                 iiifSize = "max";
             } else {
-                iiifSize = iiifSizeW + ",";
+                iiifSize = iiifSizeW + "," + ( this.version === 3 ? iiifSizeH : "" );
             }
         }
         uri = [ this['@id'], iiifRegion, iiifSize, IIIF_ROTATION, iiifQuality ].join( '/' );
@@ -403,18 +434,23 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
      * @param {array} profile - IIIF profile array
      * @throws {Error}
      */
-    function canBeTiled ( profile ) {
+    function canBeTiled ( options ) {
         var level0Profiles = [
             "http://library.stanford.edu/iiif/image-api/compliance.html#level0",
             "http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0",
-            "http://iiif.io/api/image/2/level0.json"
+            "http://iiif.io/api/image/2/level0.json",
+            "level0",
+            "https://iiif.io/api/image/3/level0.json"
         ];
-        var isLevel0 = (level0Profiles.indexOf(profile[0]) !== -1);
-        var hasSizeByW = false;
-        if ( profile.length > 1 && profile[1].supports ) {
-            hasSizeByW = profile[1].supports.indexOf( "sizeByW" ) !== -1;
+        var isLevel0 = (level0Profiles.indexOf(options.profile[0]) !== -1);
+        var hasCanoncicalSizeFeature = false;
+        if ( options.version === 2 && options.profile.length > 1 && options.profile[1].supports ) {
+            hasCanoncicalSizeFeature = options.profile[1].supports.indexOf( "sizeByW" ) !== -1;
         }
-        return !isLevel0 || hasSizeByW;
+        if ( options.version === 3 && options.extraFeatures ) {
+            hasCanoncicalSizeFeature = options.extraFeatures.indexOf( "sizeByWh" ) !== -1;
+        }
+        return !isLevel0 || hasCanoncicalSizeFeature;
     }
 
     /**
@@ -427,7 +463,9 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
         var levels = [];
         for(var i = 0; i < options.sizes.length; i++) {
             levels.push({
-                url: options['@id'] + '/full/' + options.sizes[i].width + ',/0/default.' + options.tileFormat,
+                url: options['@id'] + '/full/' + options.sizes[i].width + ',' +
+                    (options.version === 3 ? options.sizes[i].height : '') +
+                    '/0/default.' + options.tileFormat,
                 width: options.sizes[i].width,
                 height: options.sizes[i].height
             });