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CanvasPattern
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First, this example creates a reusable CanvasPattern and a CanvasGradient.
These countries are loaded from the GeoJSON file.
The style function determines whether each country
is populated with a pre-generated CanvasGradient or CanvasPattern.

.. raw:: html

   <iframe src="./xx-ol-canvaspattern.html" width="100%" height="450" style="border:1px solid">
   </iframe>


`View the example <xx-ol-canvaspattern.html>`_