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mike-000
2020-04-02 23:51:36 +01:00
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examples/disable-image-smoothing.html
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@@ -4,10 +4,8 @@ title: Disable Image Smoothing
shortdesc: Example of disabling image smoothing
docs: >
Example of disabling image smoothing when using raster DEM (digital elevation model) data.
The <b>imageSmoothingEnabled</b> (or for Internet Explorer <b>msImageSmoothingEnabled</b>) canvas
context property is set to false at the layer's <b>prerender</b> event. Additionally for a
reprojected source those properties must also be also be specified for the canvas contexts used in
the reprojection via the source's <b>reprojectionContextOptions</b> option. Elevation data is
The <code>imageSmoothing: false</code> setting is used to disable canvas image smoothing during
reprojection and rendering. Elevation data is
calculated from the pixel value returned by <b>forEachLayerAtPixel<b>. For comparison a second map
with smoothing enabled returns inaccuate elevations which are very noticeable close to 3107 meters
due to how elevation is calculated from the pixel value.