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Explanatory notes

  • Switch base and data layers on and off by opening the 'Layer' icon in the top right hand corner of the map.
  • When selecting a data layer, the legend for that layer will appear in the 'Map layer legends' area.
  • Most, but not all layers, enable you to click data points to view more information.
  • Zoom in and out by using the Zoom buttons located in the top left of the map, or by using a mouse wheel.
  • Please note: The slider will only work on layers that contain timeline data. The slider is ignored when viewing data that is a single snapshot.
  • Drag the two handles of the range slider apart to view the data for different years.
  • The slider handles can be dragged together, in order to display data for a single year.