PE&RS July 2000

Cover Image

LandScan 1998 is the most spatially precise population database ever produced for the entire world and the first global population database to employ satellite imagery. It provides gridded population estimates at 30- arc-second resolution (Dobson et al.; see p. 849-857). Best available census counts were distributed to cells based on a “smart interpolation” incorporating slope, land cover, road proximity, and nighttime lights. Funded by the Department of Defense (DOD), it was developed by Oak Ridge National Laboratory for estimating populations at risk in nuclear, biological, and chemical accidents; terrorist acts; and natural disasters. The information should meet a wide variety of needs in social science research, policy analysis, and resource management.

For more information or to acquire LandScan data, please contact Jerome E. Dobson at dobsonje@ornl.gov

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

829 The Use of Intensity-Hue-Saturation Transformation of Landsat-5 Thematic Mapper Data for Burned Land Mapping
Nikos Koutsias, Michael Karteris, and Emilio Chuvico

Transforming the RGB values of a three-channel composite to IHS values, the spectral information, needed to map the burned land, is efficiently separated in the hue component. 

841 A Comparison of Canonical Discriminant Analysis and Principal Component Analysis for Spectral Transformation
Gukang Zhao and Ann L. Maclean

The strengths and weaknesses of canonical discriminant analysis (CDA) as a spectral transformation technique to separate ground scene classes with close spectral signatures for improving forest type mapping were investigated. 

849 LandScan: A Global Population Database for Estimating Populations at Risk
Jerome E. Dobson, Edward A. Bright, Phillip R. Coleman, Richard C. Durfee, and Brian A. Worley

Remote Sensing was an essential source of two input variables — land cover and nighttime lights — and one ancillary database — high-resolution panchromatic imagery — used in verification and validation of the population model and resulting LandScan database. 

859 Remote Estimation of Grey Seal Length, Width, and Body Mass from Aerial Photography
Sean D. Twiss, Paddy P. Pomeroy, Christopher J.  Thomas, and Jon P. Mills

Problems in the remote estimation of size and mass of breeding grey seals were overcome by using high-resolution aerial photographs in combination with fine-grade DEMs to compensate for proximity of individuals to the camera. 

867 Mapping of Urban Areas:  A Multiresolution Modeling Approach for Semi-Automatic Extraction of Streets
Isabelle Couloigner and Thierry Ranchin

A semi-automatic and generic multiresolution extraction of urban road networks from very high spatial resolution imagery using multiresolution analysis and wavelet transform is proposed. 

875 Accuracy Assessment Curves for Satellite-Based Change Detection
Jeffrey T. Morisette and Siamak Khorram

A graphical technique to assess change-detection accuracy assessment figures and how this supports the benefits of a continuous satellite-based change-detection product is explored. 

881 Exploring the Capability of Some GIS Surface Interpolators for DEM Gap Fill
Peter Doucette and Kate Beard

The evaluation tends to favor the use of the splining function when interpolating for the kind of gaps and sample configurations considered. 

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

Columns & Updates
805 Headquarters News — NCEES Model Law Update
811 Headquarters News — Terrence J. Keating Elected Vice President
813 Grids & Datums — Kingdom of Spain
815 Book Review
816 Industry News

Departments
821 Corporate Descriptions
824 Who’s Who in ASPRS
825 Sustaining Members
828 New Members
828 Index to Advertisers
840 Instructions to Authors
848 Forthcoming Articles
889 Calendar
890 Classifieds
893 Bookstore
897 Professional Directory
901 Membership Application

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