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Historic topographic sheets to satellite imagery—A methodology for evaluating coastal change in Florida's Big Bend tidal marsh

Open-File Report 2002-211

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Abstract

This open-file report details the methodology used to rectify, digitize, and mosaic nineteen 19th century topographic sheets on the marsh-dominated Big Bend Gulf coast of Florida. Historic charts of tidal marshes in Florida's Big Bend were prepared in a digital grid-based format for comparison with modern features derived from 1995 satellite imagery. The chart-by-chart rectification process produced a map accuracy of ± 8 m. An effort was made to evaluate secondary map features, such as tree islands, but changes during the intervening years exceed standard surveying errors and rendered the analysis ineffective. A map, at 1:300,000 comparing historic and modern features, is provided to illustrate major changes along the coastline. Shoreline erosion is exceeded by the inland migration of the intertidal zone onto adjoining coastal forest lands. While statements of mapping accuracy are provided in the text, graphic representation of changes in the intertidal zone may be inexact at any given location. Thus caution is advised for site-specific applications. Maps and digital files provided should be used to visualize overall trends and regional anomalies, and not used to critically assess features at a particular location. Final product includes mosaic of historic coastal features and comparison to modern features.

Study Area

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Historic topographic sheets to satellite imagery—A methodology for evaluating coastal change in Florida's Big Bend tidal marsh
Series title:
Open-File Report
Series number:
2002-211
Edition:
Revised June 28, 2012
Year Published:
2004
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
St. Petersburg, FL
Contributing office(s):
St. Petersburg Coastal and Marine Science Center
Description:
i, 44 p.; Report Readme text file; Plate 4: 36 x 48 inches; Geodata download; Data Readme text file
Country:
United States
State:
Florida
Other Geospatial:
Apalachee Bay;Gulf Of Mexico
Datum:
World Geodetic System 1984
Projection:
Universal Transverse Mercator, Zone 17, Row R