Orthorectified Coastal Imagery Tiles for Merrimack River and Plum Island Sound

Orthorectified mosaic tiles provide both true color (RGB) and infrared (IR) imagery for the Merrimack River and Plum Island Sound region in Massachusetts. The imagery was acquired by the NOAA Integrated Ocean and Coastal Mapping initiative on June 19, 2011 using an Applanix Digital Sensor System. Data includes separate imagery sets for mean high water (MHW) and mean lower low water (MLLW) tidal periods.

Use Cases

• Analyze shoreline erosion by comparing RGB imagery from MHW and MLLW tidal periods.
• Map coastal vegetation health using infrared (IR) band data within the orthorectified tiles.
• Assess sediment plumes in the river estuary by examining true color (RGB) imagery at 0.50 m ground sample distance.
• Model tidal inundation extents by correlating imagery from MHW and MLLW periods with tidal datum definitions.

Strengths

• Ground sample distance (GSD) is 0.50 meters per pixel, providing high spatial detail.
• Includes both true color (RGB) and infrared (IR) spectral bands for multi-spectral analysis.
• Data is orthorectified, correcting geometric distortions for accurate spatial analysis.

Limitations

• Imagery is from a single acquisition date (June 2011), limiting temporal analysis.
• Specific row count, file size, and total area coverage are unknown.
• Data availability is restricted to one specific coastal region in Massachusetts.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI).

Collection Method

Acquired via an Applanix Digital Sensor System (DSS) and processed into orthorectified mosaic tiles.

Time Range

2011-06-19

Freshness

null

Geography

Merrimack River and Plum Island Sound region, Massachusetts, USA.