IEEE Geoscience and Remote Sensing Magazine - March 2013 - 53

all datasets have been preprocessed to remove remote
sensing specific formats and provide the data in common file formats. Earth Science data (or scenes) are usually available as various products categorized according
to the Earth Observing System (EOS) data products
levels characterization [18]. According to these levels,
Levels 0 to 1B data include corrections for geometric
anomalies, terrain variation, atmospheric interactions,
and various lighting conditions. Additionally, other
levels are defined for Landsat [19], in particular Level
1T which includes terrain correction, and for EO1 [20],
in particular Level L1GST which includes radiometric
correction, geometric correction and registration to
a geographic map projection. EO1 L1Gst images are
ortho-corrected using digital elevation models (DEM)
to correct parallax error due to local topographic
relief. All the original scenes currently included in the
IMAGE--SEER database have been acquired from Landsat
4&5/TM (7 bands) and Landsat 7 ETM (8 bands) at a

Level 1T and from EO-1/ALI
(7 bands) and EO-1/Hyperion
For each technique,
(220 bands) at a level 1GST.
datasets are selected
All original Landsat and EO-1
from different
data were downloaded from
geographic areas
one of the two USGS weband are provided
sites [9], [21], and are in Geoin simple common
graphic Tagged Image-File
Format (GeoTIFF).
formats such
Figures 4 to 6 show a sumas GeoTIFF and
mary of the IMAGESEER data
raw formats.
holdings. Since IMAGESEER
currently covers 4 different geographic areas and the 2 dates of
1992 and 2001 were chosen for NLCD maps, the database
contains a total of 8 NLCD maps (2 for each location). The
NLCD maps are re-projected from the Albers Conic Equal
Area (NAD83) projection to the Universal Mercator (UTM)
(WGS84) projection to match Landsat and EO-1 projections.

Scene and
Corresponding
Data

Listing of Basic
Metadata and
Information
Corresponding to
the Scene

1 K # 1 K Subimage
Extracted from
Center of the
Scene

Truth Data
Associated with
the Scene

FIGURE 9. IMAGESEER Web site-scene, metadata and corresponding truth data for a Landsat scene-screen 1.
march 2013

ieee Geoscience and remote sensing magazine

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