Link to USGS home page Link to USGS home page
Coastal and Marine Geology Program
Coastal & Marine Geology Program > Coastal Classification Mapping Project

Coastal Classification Mapping Project

Project Home Overview Mapping Methods Coastal Classifications Coastal Processes Coastal Vulnerability References Publications

Mapping Methods

A coastal storm hazard assessment involves two different activities. The first is classification of ground conditions and the second is translation of that information into a storm hazard vulnerability index. Present ground morphology and any man-made alterations of the land were first interpreted in the laboratory using three independent visual sources:

  1. airborne color video surveys,
  2. 35 mm aerial color slides, and
  3. Digital Orthophoto Quarter Quadrangles (DOQQs) obtained from the U.S. Geological Survey EROS Data Center in Sioux Falls, South Dakota (http://edc.usgs.gov/index.html).
The video tapes and slides are oblique low-altitude photographs of the beach obtained during helicopter surveys with horizontal positions determined by a Global Positioning System (GPS).

The video surveys, slides, and DOQQs were used to prepare the coastal classification units (Fig. 2) and to interpret the geomorphological and cultural attributes of each coastal segment. Elevations of the land surface adjacent to the barren backbeach were obtained by processing lidar data. The highest elevations of the foredunes or beach crest (where dunes are absent) are shown as a series of dots. Each dot is color coded to represent a narrow range of elevations. The units of elevation are decimeters, or tenths of meters.

Coastal & Marine Geology Program > Coastal Classification Mapping Project


FirstGov.gov U. S. Department of the Interior | U.S. Geological Survey
St. Petersburg Coastal and Marine Science Center

email Feedback | USGS privacy statement | Disclaimer | Accessibility

This page is http://coastal.er.usgs.gov/coastal-classification/methods.html
Updated April 15, 2014 @ 01:46 PM (JSS)