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Sampling Design Tool
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Sep 23 2009
Status of work
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The Sampling Design Tool provides users a means to efficiently sample a population, be it people, animals, objects or processes. The tool was created for sampling when the population and component sampling units are defined by known dimensions.
The Sampling Design Tool has two main functions: 1) to help select a sample from a population, and 2) to perform sample design analysis. When both of these functions are combined in an iterative manner, the tool effectively and simply achieves the goal of sample surveys: to obtain accurate, high-precision estimates of population metrics at a minimum of cost.
The Sampling Design Tool was developed in response to a need by scientists developing sampling strategies in environments with limited data. The tool was produced as part of an iterative process of sampling design development, whereby existing data informs new design decisions.
Key Features of the Tool
Spatial sampling: sampling and incorporation of inherently spatial layers (e.g., benthic habitat maps, administrative boundaries), and evaluation of spatial issues (e.g., protected area effectiveness)
Scalable data requirements: data requirements for sample selection can be as simple as a polygon defining the area to be surveyed to using existing sample data and a stratified sample frame for optimally allocating samples
Random selection: eliminates sampling biases and corresponding criticisms encountered when samples are selected non-randomly
Multiple sampling designs: simple, stratified, and two-stage sampling designs
Sample unit-based sampling: points or polygons are selected from a sample frame
Area-based sampling: random points are generated within a polygon
Analysis: previously collected data can be used to compute sample size requirements or efficiently allocate samples among strata
Computations: mean, standard error, confidence intervals for sample data and inferences of population parameters with known certainty
Output: geographic positions in output simplifies migration to global positioning systems, and sample size estimates and sample statistics can be exported to text files for record keeping
The zip file contains the installer and an instruction manual.
- ArcGIS 9.2 Service Pack 6 or ArcGIS 9.3
- ArcGIS .NET Support
- Microsoft .NET Framework v2.0
To install this tool in Vista, open a command line prompt as an administrator and use the command
msiexec /i "path-to-package.msi"
If there are no spaces in the path name, the quotes aren't necessary.