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  <thumbnailheight tal:content="options/thumbnailHeight">145</thumbnailheight>
  <tilesize tal:content="options/tileSize">256</tilesize>
	<zoom tal:repeat="z options/zoomLevels"
	      tal:attributes="zoomlevel z/zoomlevel">
    <width tal:content="z/width">907</width>
    <height tal:content="z/height">514</height>
    <tilesx tal:content="z/tileX">4</tilesx>
    <tilesy tal:content="z/tileY">3</tilesy>
  </zoom>
</image>