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A model is described for generating hierarchically scaled spatial pattern as represented in a thematic raster map. The model involves a series of Markov transition matrices, one for each level in the scaling hierarchy. In full generality, the model allows the transition matrices to be different at each level, potentially making available a large number of(More)
When working with raw data for multiple environmental indicators, it can be difficult to assess quality or 'health' because of the large number of indicators and inconsistencies among the indicators. By grouping the raw data into rankings, the data become more manageable and more comprehensible. We do not, however, want to lose information as a result of(More)
Prepared with partial support from the NSF/EPA Water and Watersheds Program, National Science Foundation Cooperative Agreement Number DEB-9524722. The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agency and no official endorsement should be inferred.
The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agency and no official endorsement should be inferred. Abstract For landscapes that are cast as categorical raster maps, we present an en-tropy based method for obtaining a multiresolution characterization of spatial pattern. The result is a(More)
DC under a Cooperative Agreement Number R-825385. The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agency and no official endorsement should be inferred. Abstract. A benchmark dose (BMD) for quantitative responses is a lower confidence limit on the effective dose corresponding to a specified(More)
DC under a Cooperative Agreement Number R-825385. The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agency and no official endorsement should be inferred. Abstract. Kodell and West (1993) describe two methods for calculating pointwise upper confidence limits on the risk function with normally(More)
Prepared with partial support from the United States Environmental Protection Agency Cooperative Agreement Number CR-825506. The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agency and no official endorsement should be inferred.. Abstract. Consider two maps having the same spatial extent and the(More)
The purpose of this paper is twofold: (A) to describe the challenges of reporting on changes in ecosystem health at landscape scales, and (B) to review the statistical and mathematical techniques that allow the derivation of landscape health assessments from a variety of data consisting of remote sensing imagery, demographic and socioeconomic censuses,(More)
Change is recognized as being intrinsic to ecosystems, but is also the essence of instability and the outgrowth of situations that lack sustainability. Change is arguably the most fundamental symptom for onset of abnormality in ecosystem function, and change in change cannot be detected without sufficient monitoring to determine spatial and temporal aspects(More)
Program. The contents have not been subjected to Agency review and therefore do not necessarily reflect the views of the Agencies and no official endorsement should be inferred. 1 Introduction The assessment and monitoring of landscape characteristics at different scales has become increasingly important over the last ten years. Researchers at the Center(More)