Why are there a limited number of tree species listed for each tree map?

Compiling a tree species list can be very difficult. We’ve tried to simplify the process by providing a basic list of tree species for each map based on the i-Tree Streets climate regions. After you select your tree map’s location, we load the species list associated with the region in which your map is located, as listed in this spreadsheet. Those species are linked to certain codes that enable us to calculate the ecosystem benefits generated by the trees. If you want to customize the species list on your map further, you can use the Bulk Uploader to upload additional species.