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| July 23th 2019
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Nested Pixel Plot
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This design is often used to complement a 30 m resolution satellite image (Joy 2002, Kalkhan 2004). The plot is 30 m x 30 m, covering 900  of ground surface. Within this 900 there are nine primary subplots, each 10 m x 10 m (100 ). This allows for analysis at a finer resolution than the 30 m that Landsat images provide. A smaller resolution also provides a better breakdown of the data that is contained within the 900 plot. Because hyperspectral images are taken at a finer resolution than 10 m x 10 m, three of the ten meter plots are broken down further into 5 m x 5 m secondary subplots. Within each of these plots and subplots, percent cover of vegetation is recorded.
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Previous Uses
- This is a relatively new design.
Notes
- The downloadable PDF document (see above) has additional sampling information about which variables may be recorded.
Equipment Needed
How To Setup
Methods
The Nested Pixel Plot design is a 30 m x 30 m plot that can be used to analyze data at multiple resolutions. Data is collected in each of the primary subplots at a 10 m x 10 m scale and then at a 5 m x 5 m scale in the secondary subplots. The plots are always oriented north for consistency and also to align with remote sensed images. A flag is placed in the middle of the plot and GPS coordinates are taken for the center of the plot. Next, the grid is laid out with flags in the center of each of the 10 m x 10 m plots. The soil is examined to get an estimate of soil characteristics throughout the plot. Vegetation cover is visually estimated for each subplot within the plot. For consistency either the same person should collect all of the data or should work with others taking data to ensure that estimates of cover are consistent among data collectors.
References
No publications to date.
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