Orthorectified Aerial Imagery for Coral Reef Mapping in Hawaii

AURORA hyperspectral imaging captured 72 spectral bands at 3-meter resolution for coral reef analysis. This project developed methods to map benthic habitats by interpreting aerial photos, hyperspectral, and IKONOS satellite imagery. The cooperative effort involved NOAA, the University of Hawaii, and Analytical Laboratories of Hawaii, with data processed around the year 2000.

Use Cases

• Compare benthic habitat maps generated from photointerpreted aerial photography versus hyperspectral imagery bands.
• Analyze coral reef community structure over time using the 72 ten-nanometer spectral bands for time series analysis.
• Delineate feature boundaries in shallow and deep water using optimized band widths selected during data processing.
• Assess coral health by leveraging the enhanced spectral resolution of the AURORA hyperspectral system over standard color photography.

Strengths

• Hyperspectral data provides 72 specific spectral bands for detailed feature detection.
• Imagery was orthorectified and mosaicked for geospatial accuracy across eight main Hawaiian islands.
• Data collection involved a 3-meter pixel resolution, suitable for detailed habitat mapping.

Limitations

• Data is from approximately the year 2000, making it temporally stale for current reef condition analysis.
• Specific sample sizes, row counts, and file formats for the underlying data are unknown.
• The description focuses on methodology; availability of the actual processed imagery files is unclear.

Provenance

Source

NOAA National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, in cooperation with the University of Hawaii and Analytical Laboratories of Hawaii.

Collection Method

Data gathered via AURORA hyperspectral imaging system and color aerial photography, processed for band selection and orthorectification.

Time Range

Approximately 2000 or earlier (based on last_updated field).

Freshness

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Geography

Main eight Hawaiian Islands, specifically including Oahu.