PE&RS August 2000

Cover Image

The cover for this special issue on commercial remote sensing shows a vegetation and soil map derived from commercial HyMap™ hyperspectral data covering the Jasper Ridge Biological Reserve, California. These 4.2-m spatial resolution data were processed by Analytical Imaging and Geophysics (AIG), using ENVI®, the Environment for Visualizing Images. Top image is a color-infrared-composite of bands 28, 15, 8 (0.85, 0.66, 0.55 mm), RGB. Bottom image shows the predominant land cover type derived utilizing diagnostic “endmember” spectra extracted from the hyperspectral data (inset spectral plot). Endmember names were assigned based on comparison to spectral libraries and a vegetation community map published by the Jasper Ridge Biological Preserve, Stanford University. Black areas are unclassified. The HyMap vegetation and soil map matches the published data reasonably well, however, in some cases, includes additional detail not present on the published map.

For information about ENVI, contact Research Systems, Inc., 303-786-9900; (envi@rsinc.com; or www.rsinc.com), ENVI® is a registered trademark of Better Solutions Consulting LLC, www.envi-sw.com. HyMap is a Trademark of HyVista Corporation (www.hyvista..com). HyMap data courtesy of Analytical Imaging and Geophysics (www.aigllc.com) and HyVista Corporation. Additional information about the Jasper Ridge Biological Preserve can be obtained at http://jasper1.stanford.edu.

Highlight Article

908 Wide-Area Topographic Mapping and Application Using Airborne Light Detection and Ranging (LIDAR) Technology

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

961 A Study on the Epipolarity of Linear Pushbroom Images
Taejung Kim

Epipolar lines for linear pushbroom images, rather than being straight lines, are hyperbola-like non-linear curves.

967 Relative Radiometric Normalization Performance for Change Detection from Multi-Date Satellite Images
Xiaojun Yang and C.P. Lo

The choice of the relative radiometric normalization method depends on the proper selection of a reference image, sample sets, and sample size, as well as a consideration of the scene characteristics of land-cover distribution , water-land proportion, and topographic relief.

981 Landslide Hazard Mapping and its Evaluation Using GIS: An Investigation of Sampling Schemes for a Grid-Cell Based Quantitative Method
Amod Sagar Dhakal, Takaaki Amada, and Masamu Aniya

The evaluation of five hazard maps indicated higher accuracy for the combinations in which the non-landslide group was generated by the unaligned stratified random sampling method.

991 A Method for Continuous Extraction of Multispectrally Classified Urban Rivers
Yun Zhang

By applying this method, discontinuous river segments can be connected, small water areas can be separated from noise, and noise in large water areas can be eliminated.

1001 Forecasts of Monthly Averaged Daily Temperature Highs in Bowling Green, Ohio from Monthly Sea Surface Temperature Anomalies in the Eastern Pacific Ocean During the Previous Year.
Robert K. Vincent

Models produced with this method can only be applied to the area from which the daily maximum temperature data were recorded, but they are much simpler than models that simulate the physics of the atmosphere.

1011 Quantification Error Versus Location Error in Comparison of Categorical Maps
R. Gil Pontius, Jr.

New Indices of agreement distinguish quantification error from location error, hence replace the standard Kappa to quantify similarity between maps.

1017 Accuracy Assessment of Automatically  Derived Digital Elevation Models from SPOT Images
Amnon Krupnik

Accuracy and reliability of DEMs, extracted automatically from SPOT stereo models, are tested by comparing the results to manually measured DEMs from aerial images.

Announcements
902 ASPRS & ACSM Fall 2000 Conference — Pratical Applications in the Geospatial Information Sciences

Columns & Updates
915 Grids & Datums — State of Israel
917 Industry News

Departments
956 Sustaining Members
958 New Members
958 Index to Advertisers
960 Calendar
990 Instructions to Authors
1010 Forthcoming Articles
1024 Classifieds
1027 Bookstore
1031 Professional Directory
1035 Membership Application

Yearbook
921 2000 Board of Directors
922 Region Map
923 ASPRS: The Imaging and Geospatial  Information Society
924 Installation of Officers
925 President’s Address
929 Executive Director’s Report
934 Award Recipients (Adobe .pdf 1.18mb)
941 Memorial Address: Heinz Gruner
945 Memorial Address: Gomer McNeil
949 Who’s Who in ASPRS

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