PE&RS May 2003

Cover Image

This pan-sharpened color IKONOS® image (taken March 22nd, 2002) shows a segment of the fascinating ice and mountain relief within Merrill Pass in Alaska, one of the 11 most traveled mountain passes in Alaska by General Aviation aircraft. They are also among the most dangerous, as the entry and egress into those passes is fraught with many box canyons or dead ends that can easily place a pilot and his/her aircraft in a confined area, where they cannot easily climb above the terrain, and cannot readily turn around because of the high canyon walls and prevailing winds surrounding them.

The smaller insert shows a 3D visualization of the imagery draped onto an IFSAR DEM produced by INTERMAP Technologies, Inc. The initial drape was done using ERDAS Imagine, and the DEM was re-sampled. The final cameraready image was post-processed with Strata 3D PRO software.

The article, on pages 478 to 481 of this issue, describes how GIS and remote sensing have reduced the risks associated with air navigation. The case study at the end of the article describes how the images of Merrill Pass are being used to better train pilots to traverse these beautiful but dangerous areas. The 11 passes are Northern Alaska: Anaktuvuk Pass and Atigun Pass; Eastern Alaska: Isabel Pass, Mentasta Pass, Thompson Pass, Portage Pass, Chickaloon Pass, and Windy Pass; and Southwestern Alaska: Rainy Pass, Merrill Pass, and Lake Clark Pass.

For more information about Space Imaging’s Air and Marine Transportation solutions contact Dejan Damjanovic at ddamjanovic@spaceimaging.com or at 303.254.2323 or visit our web site at www.spaceimaging.com.

Highlight Articles

478 Using GIS and Remote Sensing to Enhance Air Navigation Safety (Adobe Acrobat 1.4 Mb)
Dejan Damjanovic

484 Geometric Quality Assessment of Orthorectified VHR Space Image Data (Adobe Acrobat 5.52Mb)
Simon Kay, Peter Spruyt, and Kyriacos Alexandrou

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

513 Multi-Band Wavelet for Fusing SPOT Panchromatic and Multispectral Images
Wenzhong Shi, Changqing Zhu, Caiying Zhu, and Xiaomei Yang

A three-band wavelet is implemented to fuse 10-m SPOT panchromatic and 30-m multispectral TM images, and this method is compared with previous methods such as the two-band wavelet and IHS methods for image fusion.

521 A Simplified Atmospheric Correction Procedure for the Normalized Difference Vegetation Index
Jie Song, Duanjun Lu, and M.L. Wesely

A routine method is described for making atmospheric corrections to surface reflectances observed from a satellite by using the unique spectral signature of water pixels.

529 Comparison of Gray-Level Reduction and Different Texture Spectrum Encoding Methods for Land-Use Classification Using a Panchromatic Ikonos Image
Bing Xu, Peng Gong, Edmund Seto, and Robert Spear

There was little dif ference in classification accuracy among the three modified TS methods, which were all outperformed by the original TS method, but all TS methods performed considerably better than the use of the original image and the GLR methods.

537 Use of Multispectral Ikonos Imagery for Discriminating between Conventional and Conservation Agricultural Tillage Practices
Andrés Viña, Albert J. Peters, and Lei Ji

The Ikonos imagery, in combination with ground-reference information, proved to be a useful tool for verification of conservation tillage practices.

545 Building and Evaluating Models to Estimate Ambient Population Density
Paul C. Sutton, Chris Elvidge, and Tom Obremski

The idea of ambient population density is explored with an examination of three models of population density: Gridded Population of the World (GPW), LandScan, and one based on nighttime satellite imagery.

555 Fractal Analysis of Satellite-Detected Urban Heat Island Effect
Qihao Weng

The utility of fractal analysis to thermal remote sensing of the urban heat island effect is examined based on the study of Landsat TM images of Guangzhou, China.

567 Image Calibration to Like-Values in Mapping Shallow Water Quality from Multitemporal Data
Md A. Islam, J. Gao, W. Ahmad, D. Neil, and P. Bell

Image calibration to like-values could be used to reliably map certain water quality parameters from multitemporal TM images so long as the water type under study remains unchanged.

Announcements
502 Terrain Data: Applications and Visualization — Making the Connection
520 Call for Papers — 19th Biennial Workshop on Color Photography, Videography and Airborne Imaging for Resource Assessment Integration and Visualization II
528 Call for Papers — Modeling Uncertainty in Geo-Spatial Data and Analysis
576 PE&RS Reviewers

Columns & Updates
493 Direct Georeferencing
497 Grids & Datums — Jamaica
501 Headquarters News
504 Industry News

Departments
501 New Member List
507 Calendar
508 Who’s Who in ASPRS
509 Sustaining Member Correction
510 Sustaining Members
512 Advertiser Index
554 Instructions to Authors
577 Forthcoming Articles
578 Classifieds
580 Bookstore
584 Professional Directory
587 Membership Application

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