VOLUME 67, NUMBER 6
PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING
JOURNAL OF THE AMERICAN SOCIETY FOR PHOTOGRAMMETRY AND REMOTE SENSING
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This month’s cover shows the completed National Land Cover
data set (NLCD), which is based on 1992 Landsat-5 Thematic Mapper data
supplemented with other data sources. This 30-meter resolution data set was produced
through a cooperative project between the U.S. Geological Survey (USGS)
and the U.S. Environmental Protection Agency (EPA) as part of the Multi-Resolution
Land Characteristics (MRLC) Consortium activities. The background and
procedures are described in the Highlight article in this issue. The
regional land cover information contained in this data set is in use
in a variety of applications, including landscape analyses, land management,
and modeling of surface processes. The data set was completed in September
2000, using government and private sector mapping teams. An accuracy
assessment is underway, and has been completed for the eastern United
States [see the Highlight Article on page
650.] The data set is available in state files from an ftp site.
Established in 1993, the MRLC Consortium is a partnership of federal
agencies that produce or use land cover data. Partners include the
USGS, EPA, the U.S. Forest Service, and the National Oceanic and Atmospheric
Administration.
For more information contact the USGS EROS Data Center at 605-594-6114
OR MRLC@USGS.GOV
Output vectors from maximum likelihood and artificial neural networks
permit the development of spatially distributed fields of classification
certainty.
The Virtual Field Reference Database, developed using field measurement
and digital imagery data, was designed to support detailed assessments
of remote-sensor-derived land-cover/land-use products.
The possibility and advantages of assessing boundary uncertainty from
a single forest-type map using statistical models relating boundary
existence and location to neighboring forest attributes is examined.
Criteria for defining statistical rigor and practical utility are
proposed, and the practical implications of these criteria on map accuracy
assessment are described.
Three techniques are described for ground truthing, identifying systematic
offsets, and adjusting LIDAR spot elevation data to maximize compatibility
with local geodetic vertical control networks.
A new technique for rigorously combining multiple low-resolution digital
images into a higher resolution composite is developed and applied
to photogrammetric DEM generation.
Announcements
677 Integrating Remote Sensing at the Global, Regional and Local Scale
678 Remote Sensing and GIS Accuracy Assessment Symposium — Call for Papers
750 ASPRS-ACSM 2002 Conference — Call for Papers
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