PE&RS August 2004

Cover Image

The cover images show Landsat Enhanced Thematic Mapper Plus (ETM+) data over New Mexico’s El Capitan Mountains acquired May 11, 2003 (top) and May 29, 2004 (bottom). The lower image shows the 2004 Peppin fire that burned more than 64,000 acres. ETM+ bands 7, 5, and 2, when combined, show healthy vegetation (greenish), burn scars (reddish), active fire regions (yellow), and smoke (blue); this imagery is useful for assessing long-term wildland fire effects. The lower image, a gap-filled product developed by the USGS and NASA, combines SLC-off and SLC-on images acquired annually over the same location. SLC-on image pixels that correspond to missing SLC-off pixels are transformed via a histogram match based on common pixels and are inserted into the data gaps to create the final image. USGS/EROS Data Center scientists investigated the utility of the gapfilled imagery for various mapping applications. Preliminary results show that gap-filled imagery is well suited for burn severity, geological, and impervious surface mapping. Although other applications were not as successful, investigation continues into other promising techniques. This month’s Highlight article examines the application of Landsat 7 ETM+ gap-filled data for burn severity mapping.

Highlight Article
877 An Evaluation of Gap-Filled Landsat SLC-Off Imagery for Wildland Fire Burn Severity Mapping
Stephen M. Howard and James M. Lacasse

Columns & Updates
883 Direct Georeferencing — A Report on the 4th International Symposium on Mobile Mapping Technology (MMT 2004)
885 Grids & Datums — The Kingdom of Sweden
887 Headquarters News — ASPRS Announces Certification of the First Photogrammetric Technologist
891 Industry News

Peer-Reviewed Articles

921 Modeling Fuzzy Topological Relations Between Uncertain Objects in a GIS
Wenzhong Shi and Kimfung Liu

Based on the concepts of quasi-coincident and quasi-dif ferent in fuzzy topology, a model of topological relations in a GIS is presented.

931 Assessment of a Semantic Statistical Approach to Detecting Land Cover Change Using Inconsistent Data Sets
Alexis Comber, Peter Fisher, and Richard Wadsworth

Diverse land cover data are integrated to identify land cover change by combining expressions of expert opinion of how the data semantics relate with land cover parcel spectral heterogeneity information.

939 Modeling the Uncertainty in Orientation of IRS-1C/1D with A Rigorous Photogrammetric Model
Archana Mahapatra, R. Ramchandran, and R. Krishnan

A physical sensor model for operational use with two control points.

947 Error Propagation in Ikonos Mapping Blocks
James Lutes and Jacek Grodecki

A simplified block adjustment model is presented for use in accuracy pre-analysis of Ikonos mapping blocks.

957 Error Analysis on Grid-Based Slope and Aspect Algorithms
Qiming Zhou and Xuejun Liu

Numerous algorithms that derive slope and aspect parameters from grid-based DEMs were analyzed, tested, and compared by an analytical approach.

963 Uncertainty and Confidence in Land Cover Classification Using a Hybrid Classifier Approach
Weiguo Liu, Sucharita Gopal, and Curtis E. Woodcock

A hybrid classifier based on ARTMAP neural network and decision tree is designed to provide land cover map and spatial uncertainty information associated with classification.

973 Supporting Quality-Based Image Retrieval Through User Preference Learning
Giorgos Mountrakis, Anthony Stefanidis, Isolde Schlaisich, and Peggy Agouris

Modeling and learning user preferences in data quality attributes enables the customization of geospatial queries.

Announcements
898 ASPRS 2005 Annual Conference — Geospatial Goes Global: From Your Neighborhood to the Whole Planet
902 Pecora 16 — Global Priorities in Land Remote Sensing
982 ASPRS Fall 2004 Conference — Images to Decisions: Remote Sensing Foundations for GIS Applications

Departments
887 Region of the Month
890 New Member List
914 Who’s Who in ASPRS
916 Sustaining Members
918 New Sustaining Member
918 Advertiser Index
930 Instructions to Authors
956 Forthcoming Articles
972 Calendar
982 Classifieds
984 Bookstore
989 Professional Directory
992 Membership Application

Yearbook
894 Board of Directors
895 ASPRS: The Imaging and Geospatial Information Society
896 Installation of Officers
897 President’s Address
899 Executive Director’s Address
903 Awards Recipients
911 Memorial Address — Tamsin G. Barnes

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