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Add maxZoom option #5

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Add maxZoom option #5

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c73397f
Merge branch 'aparshin/master'
danwild Feb 15, 2017
10c2608
add maxZoom option to enable auto-scaled tiles
danwild Feb 15, 2017
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ The following options can be set:
|---|---|---|
|`date`|`Date`|Date for multi-temporal products|
|`transparent`|`Boolean`|Make no-data pixels of MODIS Multiband Imagery transparent|
|`maxZoom`|`Number`|Set a zoom level greater than the tileset provides to show auto-scaled tiles where needed (uses [maxNativeZoom](http://leafletjs.com/reference-1.0.3.html#tilelayer-maxnativezoom))|

**Note about `transparent` option.** GIBS Multiband Imagery layers use JPEG tiles without transparency (all no-data pixels are black). HTML Canvas and corresponding no-data layers are used to make no-data pixels transparent. It leads to additional requests to server and more computations in browser. So, use this option if you really need it!

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9 changes: 7 additions & 2 deletions src/GIBSLayer.js
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Expand Up @@ -8,11 +8,12 @@
}

var dateStr = info.date ? date.getUTCFullYear() + '-' + s2(date.getUTCMonth() + 1) + '-' + s2(date.getUTCDate()) : "0";
var zMax = (info.maxZoom && z > info.zoom) ? info.zoom : z;

return L.Util.template(info.template, {
Time: dateStr,
TileMatrixSet: 'GoogleMapsCompatible_Level' + info.zoom,
TileMatrix: z,
TileMatrix: zMax,
TileRow: y,
TileCol: x
});
Expand All @@ -22,7 +23,11 @@
initialize: function(gibsID, options) {
this._layerInfo = L.GIBS_LAYERS[gibsID];
options = options || {};
options.maxZoom = this._layerInfo.zoom;
if(options.maxZoom) {
this._layerInfo.maxZoom = options.maxZoom;
options.maxNativeZoom = this._layerInfo.zoom;
}
options.maxZoom = options.maxZoom || this._layerInfo.zoom;
options.attribution = GIBS_ATTRIBUTION;
this._date = options.date || null;

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