Search found 122 matches

by Jason.Henning
Thu Dec 21, 2017 3:58 pm
Forum: Applications and Utilities
Topic: Quick data mapping question
Replies: 1
Views: 117

Re: Quick data mapping question

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...
by Jason.Henning
Fri Dec 08, 2017 9:47 am
Forum: General Topics
Topic: Negative values for Net Carbon Sequestration?
Replies: 1
Views: 112

Re: Negative values for Net Carbon Sequestration?

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...
by Jason.Henning
Wed Nov 29, 2017 2:50 pm
Forum: i-Tree v6.x
Topic: On Random generated Plots
Replies: 1
Views: 142

Re: On Random generated Plots

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...
by Jason.Henning
Wed Nov 22, 2017 11:18 am
Forum: Project Descriptions
Topic: Relative tree calculations
Replies: 3
Views: 212

Re: Relative tree calculations

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...
by Jason.Henning
Wed Nov 22, 2017 10:53 am
Forum: Project Descriptions
Topic: Relative tree calculations
Replies: 3
Views: 212

Re: Relative tree calculations

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...
by Jason.Henning
Fri Nov 10, 2017 3:19 pm
Forum: Canopy
Topic: Uploading user Tree Canopy Data
Replies: 1
Views: 246

Re: Uploading user Tree Canopy Data

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...
by Jason.Henning
Fri Nov 10, 2017 3:04 pm
Forum: Applications and Utilities
Topic: iTree Streets cannot run reports.. need help...
Replies: 3
Views: 367

Re: iTree Streets cannot run reports.. need help...

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
by Jason.Henning
Thu Oct 26, 2017 2:17 pm
Forum: Applications and Utilities
Topic: iTree Streets cannot run reports.. need help...
Replies: 3
Views: 367

Re: iTree Streets cannot run reports.. need help...

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...
by Jason.Henning
Mon Oct 16, 2017 1:20 pm
Forum: Applications and Utilities
Topic: biomass adjustment factor
Replies: 4
Views: 297

Re: biomass adjustment factor

I think that's just about right. For the "Vacant" and "Wetland" field land uses there is no adjustment. For all other land uses the adjustment of 0.8 is applied to the carbon storage (i.e. biomass) estimates to account for the restricted growing space and explicit pruning of urban trees.
Thanks,
Jason
by Jason.Henning
Mon Oct 16, 2017 9:20 am
Forum: Applications and Utilities
Topic: biomass adjustment factor
Replies: 4
Views: 297

Re: biomass adjustment factor

Hello, The relevant text can be found in this publication, http://www.itreetools.org/eco/resources/08%20UFORE.pdf . Essentially, if the field land use is anything besides "Vacant" or "Wetland" a 0.8 multiplier is applied to reduce biomass estimates. For this reason we recommend using the "Vacant" la...
by Jason.Henning
Thu Sep 21, 2017 3:55 pm
Forum: Project Descriptions
Topic: IPED
Replies: 1
Views: 337

Re: IPED

Hi Horacio, Unfortunately, any new developments to IPED would require new funding. The development of that module was grant funded and that funding has run out so it is essentially static unless there are new resources to edit the module or add species. As for your translation question I will check ...
by Jason.Henning
Fri Sep 15, 2017 1:58 pm
Forum: General Topics
Topic: Eco v6 pollution removal benefit calculations
Replies: 2
Views: 328

Re: Eco v6 pollution removal benefit calculations

Hi Hannah, To fully diagnose the difference we would need your project and the exact calculations you performed. If you would like us to dig into the difference further you can send your packed project to info@itreetools.org along with the reference and exact calculations you were doing. We'll need ...
by Jason.Henning
Mon Sep 11, 2017 9:00 am
Forum: Applications and Utilities
Topic: Energy Benefits in iTree Eco
Replies: 1
Views: 396

Re: Energy Benefits in iTree Eco

Hi, The kwh and btu are both included to represent the local mix of home heating choices. You are correct that the model does calculate a single btu necessary to heat any average home but that "combined conversion factor" is then parsed out to kwh and btus based on the average local mix of electric ...
by Jason.Henning
Tue Aug 29, 2017 7:23 am
Forum: Applications and Utilities
Topic: Eco v6 mobile data collection - Entering coordinates
Replies: 1
Views: 337

Re: Eco v6 mobile data collection - Entering coordinates

Hi Mollie, Unfortunately, Eco does not currently have a method to collect GPS coordinates for individual trees. This is because Eco was developed as a plot-based sampling tool and the ability to collect individual tree inventory data was added later. We do hope to add this functionality in the futur...
by Jason.Henning
Wed Aug 23, 2017 8:03 am
Forum: Eco/UFORE
Topic: How does Eco calculate tree Structural Value?
Replies: 1
Views: 5474

Re: How does Eco calculate tree Structural Value?

Additional land uses have been added to i-Tree Eco to increase completeness and flexibility. The additional land uses and their associated location factors are: multifamily residential 0.6, other 0.5, and utility 0.4.