PE&RS December 1998

Cover Image

This month’s cover image is a portion of a 2 foot GSD natural color collection of the City of Cincinnati taken by Litton/TASC’s Emerge Digital Airborne Sensor System.  The system acquires position and attitude knowledge from its on board GPS and IMU.  This enables the automosaic, rectification, and geo referencing of Emerge’s Espatial image data without the need for ground control.  Eight digital sensor systems are currently in use across the US.  The system collects 12-bit data per band in color infrared or natural color.  Ground sample distances between one to three feet are routinely collected.  Data are delivered as ortho rectified geo referenced TIFFs with word files.  Data are viable for agriculture, forestry, land use, utility, environmental, insurance and other GIS application areas.

More information on Emerge and Espatial can be found at http://espatial.wsicorp.com.  The Emerge team can also be reached via email at emergespatial@emerge.wsicorp.com, and by phone at 1-800-834-2903.

Highlight Article

1139 Talking Digital (Adobe PDF 182Kb)
Robert Comer, Gerry Kinn, Don Light, and Charles Mondello

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

1165 Potential of High-Resolution Satellite Imagery for National Mapping Products
Rongxing Li

If the strict photogrammetric processing model and ground control points are employed, high-resolution (one-metre ground resolution) satellite imagery can be used for the generation and update of national mapping products. 

1171 Wavelets for SAR Image Smoothing
Graham Horgan

The basic ideas of wavelets for representing the information in signals such as time series and images is reviewed, and the process of how wavelet shrinkage may be used to smooth these signals is demonstrated. 

1179 A New Algorithm for Surface Determination Based on Wavelets and its Practical Application
Jaan-Rong Tsay and Bernhard P. Wrobel

Test results showed that the algorithm is capable of a fast, highly resolved, reliable, and precise determination of an object surface in large windows and with rigorous error computations. 

1189 The Influence of Geographic Sampling Methods on Vegetation Map Accuracy Evaluation in a Swampy Environment
C.P. Lo and Lee J. Watson

The effectiveness of five sampling methods was evaluated empirically to determine the thematic accuracy of six-class vegetation maps of two study areas in the Okefenokee Swamp produced by computer-assisted supervised classification of Landsat TM data. 

1201 Spectral Reflectance and Detection of Iron-Oxide Precipitates Associated with Acidic Mine Drainage
John E. Anderson and Eleanora I. Robbins

Guided by field spectral data, a remote sensing technique using bandpass interference filters and a digital multispectral video system was used to detect mine drainage in two Virginia streams.

Announcements
1146 1999 ASPRS Annual Conference
1150 Pecora 14/Land Satellite III Conference
1155 Dues Reminder Notice
1156 Call for PE&RS Articles: Photogrammetry
1177 ASPRS Certification Seals & Stamps

Columns & Updates
1143 GPS
1145 Softcopy
1151 Grids & Datums - Republic of Uzbekistan (Adobe PDF file)
1157 Industry News

Departments
1144 In Memoriam — Arthur R. Schikore
1159 Who’s Who in ASPRS
1160 Sustaining Members
1162 New Members
1163 Index to Advertisers
1164 Forthcoming Articles
1178 Instructions to Authors
1225 Classifieds
1226 Calendar
1227 Professional Directory
1231 Bookstore
1235 Membership Application

1998 PE&RS Indices
1209 Subject Index (Adobe PDF file)
1220 Author Index (Adobe PDF file)

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