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Mapping and Analysis Related to Marsh Dieoff and Residential Docks

PI: Karen Payne and Doug Atkinson (Univ of Georgia Marine Extension Service, Athens, GA, USA)

Support: GA DNR Coastal Zone Management (through a Coastal Incentive Grant)

Timeframe: 2004 -

Project Overview:
The purpose of this project was to create a spatial data infrastructure including the location, extent and distribution of both marsh die-off and residential docks and piers east of I-95. 

The first step in this process was to order and rectify new aerial photography for the study area.  We have the imagery and have nearly completed the rectification process.  The imagery is broken into three subsets of data covering three zones of the coast.


For the north (Chatham County) and south (Glynn County) zones

  • We have measured tie points and control points. 
  • We revised our QAQC method; we are implementing QA/QC right now.
  • We are in the process of re-generating orthorectified photos. 

For all three zones (north, central, south)

  • We have finalized most of the details of mosaicing the images.
  • We will soon be generating the mosaics and clipping them to quarter quads. 
  • The creation of the metadata has begun. 

Mapping of Marsh Dieoff and Docks

We have begun experimenting with different methods for subsetting the imagery, creating images covering only the marsh & water components, then extracting the docks and dieoff from the subset.


We have contacted Bob Williams who will be supervising an annual teacher workshop in Savannah in the summer of 2006.  As part of the outreach component of this project, we will participate in this workshop, as we did in 2005.



See updated project on dieback, Testing Automated Feature Extraction and Mapping Marsh Dieback of the Georgia Coast

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This page was updated August 31, 2009