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RECORD NUMBER: 14 OF 130

OLS Field Name OLS Field Data
Main Title Cartographic and Geometric Components of a Global Sampling Design for Environmental Monitoring.
Author White, D. ; Kimerling, A. J. ; Overton, W. S. ;
CORP Author ManTech Environmental Technology International, Inc., Corvallis, OR. ;Oregon State Univ., Corvallis. ;Kilkelly Environmental Associates, Inc., Raleigh, NC.;Corvallis Environmental Research Lab., OR.
Publisher c1992
Year Published 1992
Report Number EPA-68-03-3439 ;EPA-68-C8-0006; EPA/600/J-92/292;
Stock Number PB92-217397
Additional Subjects Environmental monitoring ; Ecology ; Natural resources ; Mapping ; Grids(Coordinates) ; Global aspects ; Statistical analysis ; Land use ; Design criteria ; Regional analysis ; Geodetic coordinates ; Geometry ; Reprints ; Sampling grid ; Map projections
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB92-217397 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/01/1993
Collation 20p
Abstract
A comprehensive environmental monitoring program based on a sound statistical design is necessary to provide estimates of the status of, and trends in, the condition of ecological resources. A sampling design based upon a systematic grid can adequately assess the condition of many types of resources and retain flexibility for addressing new issues as they arise. The randomization of the grid results in the requirement that it be regular and contain equal area cells when projected on the surface of the earth. After review of existing approaches to constructing regular subdivisions of the earth's surface, the authors propose the development of the sampling grid on the Lambert azimuthal equal area map projection of the surface of the earth to the face of a truncated icosahedron fit to the globe. The geometric model has less deviation in area when subdivided as a spherical tessellation than any of the spherical Platonic solids, and less distortion in shape over the extent of a face when used for a projection surface by the Lambert azimuthal projection. A hexagon face of the truncated icosahedron covers the entire conterminous U.S. and can be decomposed into a triangular grid at an appropriate density for sampling. The geometry of the triangular grid provides for varying the density; and points on the grid can be addressed in several ways.