Alex Zvoleff

Alex Zvoleff

5 packages on CRAN

glcm

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Enables calculation of image textures (Haralick 1973) <doi:10.1109/TSMC.1973.4309314> from grey-level co-occurrence matrices (GLCMs). Supports processing images that cannot fit in memory.

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Contains the Worldwide Reference System (WRS) 1 and 2 polygon data from NASA, for use by the wrspathrow package. WRS-1 and WRS-2 Shape files courtesy of the U.S. Geological Survey, from http://landsat.usgs.gov/tools_wrs-2_shapefile.php

wrspathrow

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Contains functions for working with the Worldwide Reference System (WRS) 1 and 2 systems used by NASA. WRS-1 applies to Landsat 1-3, WRS-2 applies to Landsat 4-8. The package has functions for retrieving a given path and row as a polygon, and for retrieving the path(s) and row(s) containing a given raster or vector.

knitr

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Provides a general-purpose tool for dynamic report generation in R using Literate Programming techniques.

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Supports analyses using the Global Forest Change dataset released by Hansen et al. gfcanalysis was originally written for the Tropical Ecology Assessment and Monitoring (TEAM) Network. For additional details on the Global Forest Change dataset, see: Hansen, M. et al. 2013. "High-Resolution Global Maps of 21st-Century Forest Cover Change." Science 342 (15 November): 850-53. The forest change data and more information on the product is available at <http://earthenginepartners.appspot.com>.