PE&RS March 2004

Cover Image
Global orthorectified Landsat data from the 1970s, circa 1990, and circa 2000, as well as blended mosaics derived from the circa 1990 data (28.5m spatial resolution) and the circa 2000 data (14.25m spatial resolution) are available from NASA. The image of Madagascar is a blended, panchromatically-sharpened Enhanced Thematic Mapper image (Bands 7, 4, 2 as RGB) derived from 33 individual Landsat-7 images. Subsets of data for the area defined by the black box in southeast Madagascar are Multispectral Scanner imagery for the 1970s layer with a spatial resolution of 57 m (WRS-1 path 170 row 76; Bands 2, 3, 1 as RGB), Thematic Mapper imagery from the circa 1990 layer with a spatial resolution of 28.5 m (WRS-2 path 156 row 76; Bands 4, 5, 3 as RGB), and Enhanced Thematic Mapper imagery from the circa 2000 layer with a spatial resolution of 14.25 m (Bands 4, 5, 3 as RGB). Approximately 7,500 Multispectral Scanner scenes, 7,400 Thematic Mapper scenes, and 8,500 Enhanced Thematic Mapper scenes comprise this data set from Landsat-1, -2, -3, - 4, -5, and -7. All data have been orthorectified and “tied” to ground control points and thus have a high positional accuracy. These data represent a valuable data source for the study of the terrestrial environment spanning 30 years. For more information refer to the article “NASA’s Global Orthorectified Landsat Data Set” on page 313.

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

297 A Basis for Estimating Digital Camera Parameters
Don Light

Matching the resolution of the optics with the detectors provides a sound basis for estimating the principal parameters for large digital cameras.

301 Mobile Digital Cameras for As-Built Surveys of Roadside Features
Kandiah Jeyapalan

A method for determining the three-dimensional locations of roadside features appearing on multiple sequential images captured using a mobile videologging system without any ground control is described.

313 NASA’s Global Orthorectified Landsat Data Set
Compton J. Tucker, Denelle M. Grant, and Jon D. Dykstra

The data selection, orthorectification, accuracy, access, and other aspects of NASA’s Global Orthorectified Landsat Data Set are described.

323 Mapping Snowpack Depth Beneath Forest Canopies Using Airborne Lidar
Chris Hopkinson, Mike Sitar, Laura Chasmer, and Paul Treitz,

Airborne scanning lidar and ground-based DGPS surveys were undertaken over a site of varying forest canopy to assess the potential utility of, and the systematic errors associated with, lidar for beneathcanopy snowpack distribution mapping.

331 Accuracy of Airborne Lidar-Derived Elevation: Empirical Assessment and Error Budget
Michael E. Hodgson and Patrick Bresnahan

In order of decreasing importance, the lidar system measurements were the dominant source of error, followed by interpolation error, horizontal displacement error, and surveyor error.

341 Automating the Analysis of Remotely Sensed Data
Chris Skelsey, A.N.R. Law, Mark Winter, and J.R. Lishman

The motivation behind the development of ETORA-II, an operational toolkit providing task-oriented capability, and SYMOLAC-II, a proof-of-concept application, is described.

351 Individual Tree-Crown Delineation and Treetop Detection in High-Spatial-Resolution Aerial Imagery
Le Wang, Peng Gong, and Gregory S. Biging

A promising agreement between automatic methods and manual delineation results was achieved in counting the number of trees as well as in delineating tree crowns.

359 Landscape Dynamics and Risk Modeling of Human Alveolar Echinococcosis
F. Mark Danson, Philip S. Craig, Wai Man, Dazhong Shi, and Patrick Giraudoux

Archived Landsat MSS and TM data are used to model the spatial relationship between landscape and transmission of a human parasitic disease in rural China.

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278 ASPRS Annual Conference — ...Mountains of Data — Peak Decisions...
322 Call for Papers — PE&RS Special Issue on Mapping Mars

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261 Direct Georeferencing — Fast Orthophoto Production Using Directly Georeferenced Digital Images (Adobe Acrobat 289kb)
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