Help us create a map of Britain's trees withthis Treezilla app. The system also calculates the environmentalbenefits ('ecosystem services') provided by trees, for example howmuch pollution they remove from the air.

Move the dot onto an aerial photo of the area and that's it thetree is mapped.

You can then measure the tree size and identify it, thisinformation is used to automatically calculate the ecosystemservices.

The system also allows you to add lots more information aboutthe tree such as pests and diseases, tree condition, pavementdamage etc

All the information is searchable.

If the information has already been added then you can see theidentity and other information about trees in your local area.

Get together with friends to turn your town into anarboretum!