Raw images with only normalization and calibration of the detectors (e.g. level 1A
for SPOT and EROS-A1 or 1B or Basic for QuickBird-2) without any geometric
correction are satellite-track oriented. In addition, full metadata related to sensor,
satellite (ephemeris and attitude) and image are provided;
• Geo-referenced images (e.g. level 1B for SPOT or 1G for Landsat-ETM+
)
corrected for systematic distortions due to the sensor, the platform and the Earth
rotation and curvature are satellite-track oriented. Generally, few metadata related
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to sensor and satellite are provided; some of metadata are related to the 1B
processing; or