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3 results for “CAPLTER”
Plant Survey of Current Vegetation: MAP OF SONORAN DESERT PLANT COMMUNITY DISTRIBUTION IN THE CAPLTER STUDY AREA, PHOENIX, ARIZONA
This study represents an effort to map the distribution of plant community types across the Central Arizona - Phoenix Long Term Ecological Research (CAP-LTER) site centered in metropolitan Phoenix using Landsat ETM data. Vegetation classification was carried out using field data collected from within the study area describing woody plant species. A system was devised which represented a compromise between providing floristic information and enabling maximum spectral discrimination between community types. Image classification used reference spectra derived from training sites in the field and was carried out on subsets defined by soil surface texture in order to control for the strong background soil signature inherent to arid regions. While groundtruthing revealed that vegetation on clayey soils was mapped to 91% accuracy, other sections produced maps with less accuracy. The results of this study demonstrate that image classification of desert vegetation using only Landsat ETM data is problematic and may not be practical without other supporting data, such as radar imaging.This project attempts to produce a vegetation distribution map across undeveloped parcels of outlying desert wilderness, as well as remnant mountain parks throughout the city, contained within the Central Arizona Phoenix Long Term Ecological Research (CAPLTER) study area. This effort seeks to create the first successful classification map of Sonoran Desert vegetation derived from satellite imagery. The map would also be the first fine-scale map of plant community types in the Phoenix region. The depiction would allow for a calculation of the land area covered by each vegetation class, and which communities are exposed to development pressures. This map potentially provides a basis from which researchers can measure vegetative biomass distribution across the landscape and attempt to incorporate this component into ecological models of energy flows and biogeochemical cycling in the CAP-LTER site. I
Precipitation Analysis of the CAPLTER Research Area from 2000 to 2005
The dataset is part of the effort to provide the most detailed climate data for CAPLTER and related projects. This dataset represents average monthly rainfall derived from spatial interpolation of daily rainfall data from a dense network of precipitation sensors for the period of 5 years (2000-2005).
Ordinary Kriging Precipitation Time Series for surrounding CAPLTER areas, 1999 to 2011
Annual rainfall data within the CAP/LTER boundary. Consists of 2 Layer Packages and tabular data. The table contains rainfall data from 2000 to 2011 based on ALERT data collection sites via The Flood Control District of Maricopa County. Included are 12 classified raster datasets displaying annual rainfall data for each year as well as point data of each ALERT collection site. Also included are city boundaries, the CAP/LTER boundary, Native American Reservation boundaries, and the location of the capital as either point or polygon datasets for a location reference.
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