Difference between revisions of "Sample design"
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Prior to inventory, a "stratification" needs to be done. This is valid also in a complete inventory (when all stands in the analysis area are included), since some general inventory parameters are set in this part. Considering cost-efficiency, the inventory is commonly based on a two-stage sampling procedure. Here, this starts with selecting the imported stand register of interest, i.e. the analysis area to be in-field inventoried by plotwise sampling in PPS-sampled stands. | Prior to inventory, a "stratification" needs to be done. This is valid also in a complete inventory (when all stands in the analysis area are included), since some general inventory parameters are set in this part. Considering cost-efficiency, the inventory is commonly based on a two-stage sampling procedure. Here, this starts with selecting the imported stand register of interest, i.e. the analysis area to be in-field inventoried by plotwise sampling in PPS-sampled stands. | ||
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| + | ===Instruction=== | ||
| + | # In PlanStart, open an existing project or create a new one. | ||
| + | # From the top menu "Inventory", select "Sample Design". | ||
| + | # Click on "Create New". | ||
| + | # A wizard will guide you through the setup of a sample design. The steps are explained in more detail below. In short: | ||
| + | ## Select Stand Register: Select what stand register on which to base the sample design. Edit the sample design under "Name of Sample Desing" or leave as is. Click "Next". | ||
| + | ## Create Domains: If you want, you can add domains with "Add Domain" (see below). Click "Next". | ||
| + | ## Create Strata: Click "New" to add a new stratum. | ||
| + | ## To add stands to a stratum: Select one or more cells in the matrix, and click "Add Selected". You must create the strata to which you want to add stands first. You can hold down the Ctrl-key, and select cells one by one, or press the left mouse button and | ||
| + | select blocks of cells. | ||
| + | ## After all cells have been assigned a stratum, you will be able to continue by clicking "Next". | ||
| + | ## Sample Size: Select the numner of sample stands, and allocate stands to stratum. You can let the program propose an allocation, and edit this one manually. | ||
| + | ## Sample Plot Intensity: The number of sample plot per sample stands can be a function of selected stand variables. | ||
| + | ## Sample Plot Radius: The plot radius for established forest can be set as a function of selected stand variables. The plot radius for young forests (plant plot, regeneration plot) is set at the bottom of the page (Plant Plot Radius). | ||
| + | ## Sample Trees: P1, P2, and P3 are parameters used for selecting sample trees. See below. | ||
| + | ## Leave "Automatically generate new seed" unchecked, if you want to be able to repeat the procedure and obtain the same sample result. | ||
| + | ## Summary: Display the sample list of stands to inventory. Inspect! | ||
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===Stand Data Required=== | ===Stand Data Required=== | ||