PE&RS September 2001

Cover Image
The cover, courtesy of ERDAS®, Inc., shows a mosaic of color infrared photography.  This scene, flown for a county vegetation project in northern Illinois, is provided by AERO - METRIC, Inc. of Sheboygan, Wisconsin. The imagery was processed in ERDAS IMAGINE® V8.5, which has powerful feature enhancements including upgrades to the mosaicking tool, advanced 3D visualization and scene creation capabilities. A variety of add-on application modules are also available to further extend the capabilities of ERDAS IMAGINE. These add-on products include applications in photogrammetry, radargrammetry and advanced 3D visual analysis. ERDAS IMAGINE also gives the user greater mobility for fieldwork, the ability to preserve pixel location and boundaries, enhanced features to create and edit ESRI Shapefiles, and military grid reference system (MGRS) support.

For more information about ERDAS IMAGINE 8.5 and ERDAS’ geographic imaging solutions, contact ERDAS toll-free at +1 877-GO-ERDAS [463-7327], e-mail us at info@erdas.com or visit the ERDAS Web site at www.erdas.com. ERDAS and ERDAS IMAGINE are registered trademarks of ERDAS, Inc.

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

1021 Effects of Differential Single-and Dual-Frequency GPS and GLONASS Observations on Point Accuracy under Forest Canopies
Erik Næsset

The highest accuracy was obtained using dual-frequency observations of GPS+GLONASS and the fixed processing modus.

1027 Sensitivity of Landscape Pattern Metrics to Map Spatial Extent
Santiago Saura and Javier Martínez-Millán

The sensitivity to map spatial extent of eight commonly used landscape configuration metrics is analyzed using simulated thematic spatial patterns, and quantitative guidelines of their behavior in this regard are provided.

1037 Modeling the Population of China Using DMSP Operational Linescan System Nighttime Data
C.P. Lo

The radiance-calibrated DMSP-OLS nighttime data have been found to be capable of estimating accurately the urban population of China at the provincial, county, and city levels.

1049 Spatial Dynamic Modeling for Urban Development
Xinsheng Zhang and Yeqiao Wang

A spatial dynamic model was developed and imbedded in an urban planning decision support system to simulate urban spatial growth and the impacts in the city of Beihai, China.

1059 Blended Spectral Classification Techniques for Mapping Water Surface Transparency and Chlorophyll Concentration
Perry LaPotin, Robert Kennedy, Timothy Pangburg, and Roberet Bolus

Unsupervised classification and linear logarithmic modeling were used with in situ samples and coincidental satellite imagery for estimating Secchi Disk Transparency and Chlorophyll a for West Point Lake, Georgia.

1067 Comparison of Change-Detection Techniques for Monitoring Tropical Forest Clearing and Vegetation Regrowth in a Time Series
Daniel J. Hayes and Steven A. Sader

Given the importance of land-cover and land-use change data in conservation planning, techniques to extract forest change information from multi-temporal satellite imagery of Guatemala’s Maya Biosphere Reserve were developed and tested.

1077 Potential of Road Stereo Mapping with RADARSAT Images
Thierry Toutin

The evaluation of image content and positioning accuracy of roads stereo-extracted from RADARSAT fine and standard mode images is described.

Announcements
1015 Measuring the Earth — Digital Elevation Technologies
1058 Integrating Remote Sensing at the Global, Regional, and Local Scale
1084 CALL FOR Papers: Characterizing and  Modeling Landscape Dynamics
1090 GeoTech 2001: The Mapping, Imaging, GPS and GIS Users Conference
Cover 3 ASPRS-ACSM 2002 Conference

Columns & Updates
993 Software Review
1000 Grids & Datums — The Syrian Arab Republic
1005 Headquarters News
1007 Industry News

Departments
1017 Who’s Who in ASPRS
1018 Sustaining Members
1020 Index to Advertisers
1020 New Members
1048 Instructions to Authors
1057 Forthcoming Articles
1085 Calendar
1087 Classifieds
1091 Bookstore
1095 Professional Directory
1099 Membership Application

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