How to Use i-Tree Canopy
- Map your project's boundary area
- Define your survey cover classes.
- Configure the regional settings of your project parameters
The Survey process
i-Tree Canopy will not automatically assess the land cover at the random points it creates for you.
Tip: you can determine the date of the Google imagery in i-Tree Canopy by looking at the dates of more recent imagery in Google Earth.
Understanding the Report
The report lists the percentage and amounts of cover classes you assessed during your survey.
Provided one of those classes was "tree", i-tree Canopy lists out the estimated benefits of the tree cover within your project boundaries.
Change-Analysis Survey using Historical imagery in Google Earth
FIRST, complete an i-Tree Canopy project as outlined above.
Tip: you may wish to print out your report; otherwise you can always reload the project later to view it.
(make sure you save your project often so you don't lose any points!)
These steps require Google Earth, available from Google
- Export a KMZ file of your points (Project > File > Export > KMZ) ofr use in Google Earth.
- Go to Project > File > Change Survey and load in your previously completed i-Tree Canopy project.
- Immediately save this project with a NEW name in order to preserve your original i-Tree Canopy project. example: MyProject_Change1995.
- You won't be able to add any points to it in order to maintain the statistical estimations.
- Open the KMZ file in Google Earth and expand the list of points on the left side.
- Place the two application windows side-by side - Google Earth on the left and i-Tree Canopy on the right
- Tip, if you have two monitors, the following process is easier.
- Use the the "Historical Imagery" slider in Google Earth to select older imagery.
- Do not change it once you begin; this will be your comparison year.
- Click on the first point on the i-Tree Canopy list and the map will zoom and pan to that point.
- Double-click the same point ID in the KMZ list of points in Google Earth - it will zoom and pan to it.
- Tip: you may need to zoom in a bit more in Google Earth.
- If conditions evident at the point in Google Earth are different than at the point in i-Tree Canopy, change the i-Tree Canopy assessment accordingly.
- example: In the Google Earth imagery, the point falls on tree canopy, but in the newer imagery in i-Tree Canopy, the point falls on a parking lot constructed in the meantime, change the i-Tree Canopy assessment to "tree".
- Repeat for all the points in your i-Tree Canopy project - making sure to save your project as you go so you dont' lose data!
- Once you have gone through and reassessed all the points, you can compare the report of this change survey against your original project's report.
- To calculate statistical changes in cover classes using data collected in two i-Tree Canopy projects in which the same points were evaluated for two different dates, click here to download the Tree Change Calculator.