Hot Spot: Minimize Sample Size By Cost

With Hot Spot: Minimize Sample Size by Cost, the user defines the grid style and cost parameters. This combination yields a possible sample number. This sample number, grid style, and the limitations of the boundaries and layering scheme then define a grid block and grid block length.

Availability

This sample design is available for all SADA files.

Steps

These are the steps that display in the Steps Window when this sample design is selected during the step Set sampling parameters. Click on the links below for more details about the following steps.

1. See the data, Draw/Edit Prior, Display empty plot

2. Set up the site

3. Set GIS overlays

4. Set sampling parameters

5. Show the results

6. Import sampled data

7. Format picture

8. Auto-document

9. Add to results gallery (not available for empty SADA files)

Design-specific Parameters

When Hot Spot: Minimize Sample Size by Cost is selected during the Set sampling parameters step, the Parameters Window changes to look like the following:

image\v4ht0411.gif

Under Grid Definition, select a square, triangle, or rectangle grid style and enter the cost parameters under Costs to Sample using positive US currency values with 2 decimal places. The planning cost is a one-time cost while the collection and analysis costs apply to each sample created. Enter a positive value large enough to create at least one sample in the Budget field.

Where N is the number of samples,

[Total Budget] [Planning Cost] = N * [(Collection Cost) + (Analysis Cost)] or

N = [(total Budget) (Planning Cost)] / [(Collection Cost) + (Analysis Cost)]

Press Show the Results and SADA will determine the number of new samples and select their locations based on the grid style. SADA will also enter the resulting grid size information on the Parameters Window. If there are polygons, new samples will only be placed inside the active polygons.

image\v4ht0412.gif

To view the actual coordinates of the new sample points export the information to a comma delimited excel file by using the Output to File toolbar button in main form of SADA.