PE&RS May 2001

This month’s cover is provided by Intermap Technologies and shows a view of the Morrison Quadrangle in Colorado. The background image is comprised of a STAR-3i IFSAR image on the right and a shaded relief representation of the STAR-3i digital surface model on the left. Superimposed on the background image are four orthorectified image chips, clockwise starting from the upper right is an aerial photograph, an IKONOS 1-m satellite image, a color-coded digital surface model, and a merge of the color-coded digital terrain model and a shaded relief of the digital terrain model. The aerial photograph was orthorectified using the STAR-3i digital terrain model. A winter scene of IKONOS imagery was orthorectified to 3.5-meter horizontal accuracy using the STAR-3i digital terrain model. The colorized digital terrain model where the blue represents the lowest elevations and the bright pink represent the highest. A merge of the color-coded digital terrain model and a shaded relief of the digital terrain model.

For more information, please see http://www.intermaptechnologies.com/ and http://www.globalterrain.com/

Peer-Reviewed Articles (Click the linked titles to see the full abstract)

565 Accuracy of Rectification Using Topographic Map versus GPS Ground Control Points
David P. Smith and Samuel F. Atkinson

Ground control points acquired using the Global Positioning System (GPS) were superior to those determined from topographic maps for satellite image rectification.

571 On Statistical Band Selection for Image Visualization
M. Beauchemin and Ko B. Fung

A normalized version of the Sheffield index, based on the minimization of redundant information between bands, is introduced, and a procedure to help determine an appropriate band subset size is proposed.

575 Appropriate Plot Size and Spatial Resolution for Mapping Multiple Vegetation Types
Guangxing Wang, George Gertner, Xiangyun Xiao, Steven Wente, and Alan B. Anderson

The method is assessed using field data and satellite TM data by developing semi-variograms by vegetation type and TM band; and by cross validation of vegetation classification.

585 High-Resolution DEMs for Urban Applications from NAPP Photography
Curt H. Davis and Xiangyun Wang

Digitally scanned 1:40,000-scale NAPP aerial photography, used in conjunction with precision ground control, can be used to generate DEMs with horizontal resolutions of 1 to 3 meters and vertical accuracies on the order of 1.8 to 2.5 meters.

593 Analysis of GAC NDVI Data for Cropland Identification and Yield Forecasting in Mediterranean African Countries
Fabio Maselli and Felix Rembold

A preliminary analysis showed that relatively high correlations were present between crop yield and mean NDVI values of specific months computed at national levels.

603 Operational Monitoring of Green Biomass Change for Forest Management
Pol Coppin, Kris Nackaerts, LLoyd Queen, and Ken Brewer

A description of an operational, quantitative, remote-sensing-based change detection system utilizing standardized differences of Kauth-Thomas transformations is presented; the testing of minimum distance, maximum likelihood, and Mahalanobis distance classifiers is also included in the presentation.

613 Applying Spatial Autocorrelation Analysis to Evaluate Error in New England Forest-Cover-Type Maps Derived from Landsat Thematic Mapper Data
Scott A. Pugh and Russell G. Congalton

The analysis indicated that concentrated blocks of error were more pronounced in a public lands study area than in a private lands study area, where error was more evenly distributed.

621 Two-Medium Photogrammetry for Bottlenose Dolphin Studies
A.K. Chong and K. Schneider

An in situ digital stereophotogrammetric technique to measure dolphin’s body dimensions accurately at sea without having to capture the individuals is introduced.

Announcements
538 Digital Elevation Model Specialty Conference
629 ASPRS-ACSM 2002 Conference — Call for Papers

Columns & Updates
539 Letters to the Editor
541 In Memoriam — Jack E. Estes, Richard L. Graville, and Ian McHarg
543 Executive Summary — Landsat Data Continuity Mission Workshop
545 Grids & Datums — România
549 Headquarters News
555 Industry News

Departments
561 Who’s Who in ASPRS
562 Sustaining Members
564 Index to Advertisers
564 New Members
612 Instructions to Authors
628 Forthcoming Articles
631 Calendar
632 Classifieds
635 Bookstore
639 Professional Directory
643 Membership Application

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