Search found 231 matches

by Jason.Henning
Mon Feb 22, 2021 10:23 am
Forum: Eco/UFORE
Topic: How does ECO extrapolate field plot data to the entire study area?
Replies: 1
Views: 228

Re: How does ECO extrapolate field plot data to the entire study area?

i-Tree Eco uses plot-based stratified sampling statistics. It does not rely on any remotely sensed data. In essence it calculates the values of interest per unit area from each plot (e.g. trees per acre). It then averages those values to come up with an estimate for each stratum by averaging those p...
by Jason.Henning
Fri Feb 19, 2021 3:24 pm
Forum: Eco/UFORE
Topic: Object ID Issue
Replies: 2
Views: 78

Re: Object ID Issue

Hi Lindsey, That ID field has to be controlled by i-Tree Eco because they are linked to the underlying database structure. Likely what is happening is you may have a duplicate ID or the IDs may be out of order which causes a conflict in the database and Eco subsequently renumbers the rest of the rec...
by Jason.Henning
Thu Feb 18, 2021 3:56 pm
Forum: Canopy
Topic: Tree Benefit Estimates
Replies: 4
Views: 407

Re: Tree Benefit Estimates

Hi Paul, Our development team is working on creating full methods documentation for the UK and Sweden adaptation. In the meantime I went ahead and posted a preliminary draft of a document summarizing the data sources that facilitated those expansions. You can find that on our website under the "Meth...
by Jason.Henning
Wed Feb 17, 2021 10:18 am
Forum: Eco/UFORE
Topic: Blanks in Datasets iTree Eco
Replies: 2
Views: 69

Re: Blanks in Datasets iTree Eco

Thanks for the question. Unfortunately, i-Tree Eco cannot handle partial data for some trees in a given inventory. When you turn on any of the recommended variables during project set-up you must provide all of those variables for each of your trees. When you activate only species and dbh the softwa...
by Jason.Henning
Wed Feb 17, 2021 9:39 am
Forum: Design
Topic: Changes in Design Numbers
Replies: 1
Views: 263

Re: Changes in Design Numbers

Hi Karen, Thanks for the question. It is tough to say exactly what is going on here. It could simply be that the differences in the sizes and species of the trees are enough to account those differences in results. It could also be due to changes in the underlying model. We generally try to incorpor...
by Jason.Henning
Wed Jan 27, 2021 10:21 am
Forum: Database
Topic: The problem about the precipitation data
Replies: 1
Views: 286

Re: The problem about the precipitation data

Hello, Please email your precipitation data file and the verification results to info@itreetools.org. Without your data it is difficult to diagnose the issue. It could potentially be that you are submitting the data for a leap year but using the template for a non-leap year. Thanks for your question...
by Jason.Henning
Fri Jan 22, 2021 3:09 pm
Forum: Canopy
Topic: Tree Benefit Estimates
Replies: 4
Views: 407

Re: Tree Benefit Estimates

Hi, The benefits estimate will be less reliable in Canada. The benefits are estimated by county here in the US. The benefit estimates they rely on measurements of tree leaf area in each county based on the US national forest inventory (FIA), local pollution data, local weather data, and human popula...
by Jason.Henning
Mon Oct 12, 2020 8:58 am
Forum: Eco/UFORE
Topic: Sample plot size distribution per stratum
Replies: 4
Views: 809

Re: Sample plot size distribution per stratum

Thanks for your question. The area of the stratum does not impact the appropriate number of plots. The number of plots will directly impact the sampling error of your project and if you want to minimize that sampling error you would need to place more plots in strata that have high variability. This...
by Jason.Henning
Mon Oct 12, 2020 8:47 am
Forum: Eco/UFORE
Topic: Plot based land cover class estimation
Replies: 1
Views: 242

Re: Plot based land cover class estimation

Thank you for your questions. 1. The land cover classes of a given plot should be determined in terms of percentage, according to the users guideline. However, I couldn't see any mechanism how to estimate the land cover classes at plot level during the field survey. Does it mean estimation based on ...
by Jason.Henning
Tue Sep 29, 2020 5:38 am
Forum: Database
Topic: Adding Weather Stations to add precipitation data
Replies: 1
Views: 979

Re: Adding Weather Stations to add precipitation data

Unfortunately, we cannot accept new weather station data at this time. The weather station data has very strict formatting requirements and requires information about hourly wind speed, mixing heights, and cloud cover that are not readily available from most weather stations. For more information ab...
by Jason.Henning
Tue Aug 11, 2020 12:21 pm
Forum: Eco/UFORE
Topic: Eco v6 crashed or stopped working
Replies: 6
Views: 19133

Re: Eco v6 crashed or stopped working

There is an issue with a recent automatic Microsoft update that is causing this problem. Essentially, there is an entry in the computer's registry for the 32-bit version of the MS Database Engine however the update removes or disallows the 32-bit version. This issue will be resolved in the next rele...
by Jason.Henning
Thu Jul 30, 2020 3:16 pm
Forum: General
Topic: Social cost of carbon
Replies: 7
Views: 10912

Re: Social cost of carbon

UPDATE: 7-30-20 The current cost of carbon used in i-Tree Canopy and i-Tree Eco is $170.55/ton of C and this has been updated with the 2019 PPI which was down 1.1% from 2018. We consider this to be in 2020 dollars as it is using the latest available PPI. User's can check on the latest default carbon...
by Jason.Henning
Thu Jul 09, 2020 8:44 am
Forum: Eco/UFORE
Topic: Significance of Crown Measurements
Replies: 1
Views: 783

Re: Significance of Crown Measurements

Hi Charlotte, This can be difficult to answer and varies depending on your tree population. If your trees are similar to the ones used to create the models that estimate crown parameters based on dbh then there will be little impact on average. However, for any single tree the differences may be lar...
by Jason.Henning
Tue Jul 07, 2020 12:22 pm
Forum: General
Topic: Trouble Uploading Data for Report
Replies: 4
Views: 1663

Re: Trouble Uploading Data for Report

Hi Charlotte,
Yes, please email your spreadsheet and your packed project to info@itreetools.org. You can create a packed project from the "file" menu in i-Tree Eco then send along the .zip folder that is created.
Thanks,
Jason
by Jason.Henning
Mon Jul 06, 2020 12:19 pm
Forum: General
Topic: Trouble Uploading Data for Report
Replies: 4
Views: 1663

Re: Trouble Uploading Data for Report

Hi Charlotte, The limitations on the "crown: base height" are that it must be greater than 0 and less than the "crown: top height". Additionally, if you have selected to collect "crown size" parameters you must supply valid values for "top height", "base height", "width" (in both directions), and "p...