Hi Pete, Diversity indices are indeed available in the latest version of i-Tree Eco by going to the "Report" tab and selecting "Composition and Structure">"Diversity Indices">"By Stratum". The diversity indices are only available for plot based projects that use statistical sampling. This is because...

Hi, Yes you are correct that those codes are from Streets. There isn't anything directly comparable in Eco, but Eco does have some "other" categories you can use. The categories are at the family level. In Eco that would be "Hardwood (Magnoliopsida)" for the trees in Street's broadleaf (BDS, BDM, an...

Hi Glen, Thanks for your question. There are a few things going on here that cause the differences between the estimates. 1. They are indeed using different models. You are correct about this and it is one of the biggest factors in the differences here. The National Tree Benefits Calculator (NTBC) i...

Hello, i-Tree is not using a financial model like what you describe. The annual value numbers for i-Tree Eco are calculated by differing methods depending on the benefit you are looking at. For example for annual carbon sequestration Eco is projecting the growth of the tree over the next year and ap...

In i-Tree those terms are used interchangeably. This forum post quotes and links to the original description of the methods relevant to structural/compensatory value, viewtopic.php?f=19&t=993&p=1876&hilit=c ... alue#p1876.
Thanks for the questions.
-Jason

Hi Jess, Thanks for bringing this to our attention. I made some changes with how the search feature works on the message board. Hopefully, you can more easily find what you are looking for now. I did a quick test using the search term "excel" and it seemed to correctly find the relevant posts. Thank...

Hi Jess, I am not able to recreate this exact issue. I'm not sure if you are trying export your data or export one of the specific results tables. You should be able to export your data by opening your project in Eco, then selecting the "Data" tab and clicking on the "Trees" button. That will open t...

Hi Chris, Here's a quick rundown of those various DBH related fields. The DBH 1 (in) field is indeed required for all projects and that is where you would enter the DBH of a single stem tree in inches. The additional fields, DBH 2 (in) through DBH 6 (in), are for use if you have a mutli-stem tree an...

It is possible to get negative net sequestration values for larger and older trees. Trees release carbon to the atmosphere through respiration and decay while they take up and sequester carbon by adding new woody material. Mature trees will eventually reach a point where they are adding new wood ver...

This really depends on what you are trying to estimate the tree benefits for. If they want to know the benefits for the whole district including the areas of Agriculture and Preserve then you have to measure plots in those areas. If you only want to know the tree benefits for the urban area then you...

As to your crown parameter questions, the crown widths (N/S and E/W) as well base and top heights do directly impact the accuracy of the carbon, air pollution, and stormwater results. Those models are directly driven by the estimates of leaf surface area. i-Tree Eco estimates leaf surface area by de...

Hi Horacio, Here are the methods behind converting the carbon sequestration to vehicle miles. 1. Convert amount of carbon sequestration (metric tons) to lbs by multiplying by 1,000*2.204 2. Divide amount of carbon sequestration (lbs; calculated in step 1) by the total average C emissions per vehicle...

Hi Stu, This is a common question we get and I'm going to move it to the i-Tree Canopy section of the forum so it is easier for others to find. As to the other part of your question if you have individual tree measurement data you can use i-Tree Design if you just have a few trees and want basic res...

Hi Larry,
I am glad that worked for you we do have an update on this issue, see my edits to my original response.
Thanks,
Jason

We have seen a few instances of this issue recently and it has to do with a very recent Microsoft Windows patch. Microsoft is aware that the patch is causing issues with various third party software but at the moment they have not offered an updated patch or any other remedies. Unfortunately, the on...