NOAA Orthorectified DEM Image Tiles for Bombay Hook, Delaware

A 2011 snapshot covering 177 square kilometers of the Bombay Hook National Wildlife Refuge and surrounding areas in Kent County, Delaware. The dataset consists of 101 orthorectified image tiles (1700 m x 1700 m) with a 25cm cell size, produced by Dewberry for NOAA and the Delaware DNREC. It provides a detailed digital elevation model depicting ground surface and water features.

Use Cases

• Coastal habitat mapping and change detection using high-resolution ground surface imagery.
• Flood modeling and sea-level rise impact assessment based on elevation data.
• Wetland delineation and water feature analysis for environmental conservation planning.
• GIS base layer creation for regional planning and land management in Kent County.

Strengths

• High spatial resolution with a 25cm cell size for detailed terrain analysis.
• Covers a specific, managed area of 177 sq km with 101 consistently sized tiles (1700m x 1700m).
• Includes ancillary files (.rrd, .his, .jpg, .xml) and FGDC-compliant metadata for usability.

Limitations

• Specific acquisition date(s) within 2011 are not provided, offering only a yearly snapshot.
• Conflicting last-update metadata between platforms (2011 vs. a future 2026 date) creates uncertainty about versioning.
• Primary data is in the proprietary ERDAS .img format, which may require specific software for access.

Provenance

Source

National Oceanic and Atmospheric Administration (NOAA), Department of Commerce, in partnership with the Delaware Department of Natural Resources and Environmental Control (DNREC).

Collection Method

Ortho mosaics produced by Dewberry company, created to specifications outlined by NOAA's Coastal Services Center.

Time Range

2011

Freshness

Data represents a 2011 collection; platform update dates are inconsistent and not indicative of new data.

Geography

Bombay Hook National Wildlife Refuge and surrounding areas in Kent County, Delaware, USA.