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dataset
Eric Kabuchanga
RCMRD
System Developer
20150210
ArcGIS Metadata
1.0
Africa_Lethology.tif
2009-09-01T00:00:00
Roger Sayre
U.S. Geological Survey, Geographic Analysis and Monitoring Unit
Senior Scientist
Roger Sayre
U.S. Geological Survey, Geographic Analysis and Monitoring Unit
Senior Scientist
Eric Kabuchanga
RCMRD
System Developer
The African surficial lithology dataset is a map of parent materials - a mix of bedrock geology and unconsolidated surficial materials classes. The goal was to produce a map that reflected the key geological parent materials which act as primary determinants in the distribution of African vegetation /ecosystems. It is a compilation and reclassification of twelve digital geology, soil and lithology databases. Nineteen surficial lithology classes were delineated in Africa based on geology, soil and landform. Whenever available, multiple sources of ancillary digital data, hard copy maps and literature were reviewed to assist in the reclassification of the source data to the African surficial lithology classification. Of particular note, due to the varying spatial and classification resolutions of the geologic source data, the African surficial lithology map varies in spatial complexity and classification detail across Africa. Purpose: The African surficial lithology data was developed as a primary input dataset for an African Ecological Footprint mapping project undertaken by the U.S. Geological Survey and The Nature Conservancy. The project used a biophysical stratification approach which was based on mapping the major structural components of ecosystems (land surface forms, lithology, isobioclimates and biogeographic regions). These unique physical components, which are considered as the fundamental building blocks of ecosystems, were reviewed by regional vegetation and landscape ecology experts and used in a classification and regression tree (CART) inductive model to map intermediate scale African ecosystems.
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Africa surficial lithology
RCMRD SERVIR-Africa Team
geology
rocks
soil
ecosystems
landforms
africa
usgs
withheld
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