It looks like i-Tree Vue is your best choice for collecting and analyzing information on trees that are growing in your community.  

It makes use satellite data to quantify and put a dollar value on the annual environmental and aesthetic benefits of the urban or community forest over an area.

There are many resources available for you to use, as you explore the most useful method to use i-Tree Vue in your area.  The following links provide a list of tools that may be of value to you.  

WEB LINKS Official i-Tree Website Learn About i-Tree Vue		DOWNLOAD THE APPLICATION Click Here to download i-Tree Vue
DOCUMENTS i-Tree Vue User's Manual i-Tree Vue Technical Notes Using i-Tree Vue: Results in about an hour		VIDEO AND MEDIA Installing i-Tree on Your Computer (YouTube) An Overvuew of i-Tree Vue Using i-Tree Vue to Quantify Carbon Storage
POWERPOINT PRESENTATIONS Using i-Tree Vue The Value of Your Urban Forest: i-Tree Tools An Overview of i-Tree Vue		OTHER TOOLS i-Tree User's Forum - Vue