Entering Data Manually
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UNDER CONSTRUCTION!
Besides importing data in PlanStart, or sampling data with Ivent, there is the possibility to insert forest data directly in StandWise. In this case, you enter one stand at at time, and for each stand you enter one or more sample plots. For each sample plot, you can enter a tree list, or you can let the program generate tree lists from theoretical diameter distributions, in which case you only enter species-wise data.
Instructions:
- Open StandWise
- Open an existing project or create a new one
- Under the "Tools"-mneu, choose "Register Tree Data..."
- In "Register Tree Data", a new treatment unit can be created, in a new or existing analysis area, that will be saved to the forest database. To this stand, one or more plots are added. Single-tree data can either be simulated from mean values (at the plot-level) or added tree by tree.
In the simulations, diameters at breast height (DBH) for the different tree species are obtained with a Weibull-distribution. For each tree species, the basal area (BA, in m2/ha) and the number of stems per hectare are here needed. To a plot, trees can also be added from the keyboard. Select tree species, tree type and type the diameter and the number of stems (i.e., a possibility to add more than one tree at the same time). This is a quite lengthy procedure but can be useful, e.g., when analysing old inventory data only available in paper forms. Another possibility: copy data from Excel, with one tree per row and corresponding values in separate colums, and paste the tree-list. Numeric values are accepted and will obtain corresponding SpeciesCode and TreeType.
Any sample tree data, i.e. height and age, needs to be analysed externally. To make use of such data it is possible to add estimated height and age to all trees at the plot. In such case, change from "UseFunction" to "FromDatabase" at InitialHeightSource and InitialAgeSource in the Production Model Control Table. Selecting "Correction factors..." gives the opportunity to, to each tree species, change the factor that corrects the applied functions estimates of height and form height.
Remember to save the project, to save the simulated/registered trees (with the "Save"-button below), and to use the "Refresh"-button to confirm edits and registrations.
The values that should be given at plot-level; latitude, region, site index, etc., follows the definitions in PlanStarts Import of stand register. With the "Copy..."-button these values can be copied to a new plot, for the moment only within the current stand.
In "Register treedata" it is possible to view and edit plot and tree data, but only when the data has been imported in such manner. The user can add trees to a plot as well as remove trees (by pressing the "Delete"-button when the row is selected). However, data imported and simulated in PlanStart can only be edited prior to this import. The tree-list in StandWise can be copied and pasted in some other software. Both mean values at the stand level and information about the single tree can be obtained, described in the following section. However, complete tree-lists for a plot or a stand can, for now, only be derived from the forest database using SQL-queries. Another possibility: try to create a diagram of your own choice, including the variable "DiameterClass".
NB: In registering trees, real or simulated, make sure an adequate amount of data is used - if only a few plots (per stand) is used, these plots should have an adequate area. Else, the simulations might end up in treeless plots and stands.