SiteTools

 

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          Overview of Features

    SiteTools was created to fill several requirements. People needed to produce site index tables for more species and equations as they were developed, and also to calculate site index for large data files containing height and age. They also needed a standard set of functions for computing site index, height, age, or years to breast height. These functions were then available for use in other programs developed by the Ministry of Forests (e.g., TASS, TIPSY and VDYP) and outside the ministry.

    SiteTools provides convenient access to dozens of site index and height growth equations for British Columbia's commercial tree species, as well as site index conversion equations and growth intercept equations for some species. You can plot graphs, print tables, or just use the calculator.  It also has a batch option for large data files. SiteTools contains the recommended site index curves used by the B.C. Ministry of Forests in timber supply analysis.

    The Research Branch of the Ministry of Forests developed and maintains SiteTools with the support from the Forest Investment Account (FIA). The Province of British Columbia has the copyright. SiteTools is distributed free of charge at the discretion of the Ministry.

    SiteTools includes two of the most common site index estimation methods in B.C. They are the growth intercept method, and the site index curve method. The methods differ in their availability throughout the province, their suitability for different stand conditions, the survey data required to predict site index, and their accuracy. The other common site index estimation method is SIBEC (Site Index by Site Unit and Species Look-up Table).

Growth Intercept and Site Index Curve Methods. With the growth intercept and site index curve methods, site index is predicted from the height and age of sample trees measured on the site. These measured values are used to determine site index. The growth intercept method is used on younger stands (3-50 years breast height age), whereas the site curve method is generally applied to stands greater than 50 years breast height age but may also be applied to younger stands.

 

How SiteTools Works

   You can use SiteTools for the following applications:

  • Calculate value (eg. single height, age or site index)

Select 'Calculate value' from the Tools menu to open the calculator tool and for the selected species you can calculate a value as follows:

Calculate

By Knowing

Height

Age and Site Index

Site Index

Age and Height

Age

Height and Site Index

Years to breast height

Site Index

Convert to Site Index of other species

Other species Site Index

  • Create table

Select 'Create table' from the Tools menu to generate a table for the selected species as follows:

Generate a table of:

By Knowing:

Height

Age and site index

Site index

Age and height

Age

Height and site index

Years to breast height

Site index

Convert to site index of other species

Other species site index

    Once you have created a table, you can either save it and create another one using the Create table option in the Tools menu, or edit the table using the Table specifications option from the Edit menu. If you want to use the data in another program use the Export option from the file menu to create and save an ASCII file containing only table data.

  • Plot graph

     Select this option to open the Plot Graph dialog box, and to access the Plot program. This program is designed to work with a number of different programs such as TIPSY. This release of SiteTools comes with an upgraded Plot program. Access to the Plot program has also changed. Now you have to create a table first, then ask SiteTools to send the data to the Plot program.

  • Process batch job

     Batch SiteTools lets you calculate more than one value at a time.  It requires an input file and specifications for calculating and formatting the output.

 

 

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Last Modified: February 20, 2001 . Ministry contact: Gord Nigh.
Webmaster: For.Prodres@gov.bc.ca