IEEE Geoscience and Remote Sensing Magazine - March 2013 - 54

Additionally, all datasets
were pre-processed in the folCurrently, IMAGESEER
lowing manner:
contains a total of
1) For each geographic area,
1,927 scenes; 1,090 of
the original scenes are
which are original
geo-registered to the corresponding (spatially and
and sub-scenes.
temporally) NLCD maps.
2) From the geo-registered
scenes, the portion of
the scene defined by the 4 (lat, long) corners of
the corresponding NLCD map is extracted. Therefore, all scenes from a given geographic area correspond to the exact same (lat, long) coordinates
on the ground.
3) The geo-registered scenes are processed with a cloud
detection algorithm, appropriate for the instrument that
acquired the scene.
4) The original scenes, geo-registered scenes, extracted
scenes, and cloud masks are then converted to 2 common formats, GeoTIFF and raw.

5) Smaller size, 1024 # 1024, scenes are extracted from
the center of the geo-registered scenes.
6) Finally, thumbnail of the original scenes are created for
browsing purposes.
In summary, for each scene of interest, IMAGESEER
provides:
◗◗ 3 dataset sizes: preview (thumbnail) images, full
scenes (around 7000 # 7000 pixels in all instrument
bands) and a smaller sub-scene of size 1024 # 1024 for
easy manipulation
◗◗ 2 dataset formats: Raw data, and GeoTIFF formats.
Currently, IMAGESEER contains a total of 1,927 scenes,
1,090 original and sub-scenes, with the associated NCLD,
cloud masks and registered scenes.
IV. IMAGESEER Web User Interface
As IMAGESEER is designed to lower barriers to access
NASA data, a user is not required to create an account or to
log in to access all the data on the web site, including reading articles, browsing the database or downloading data
files. The only feature provided by creating an account is

Scene and
Corresponding
Data (2)

Map Data
Classification
Information

Each Band Can Be
Downloaded
Individually

FIGURE 10. IMAGESEER Web site-scene, metadata, and corresponding truth data for a Landsat scene-screen 2.

54

ieee Geoscience and remote sensing magazine

march 2013

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