Gulf Coast Landcover Analysis

The following datasets (available on CD from Urban Forestry South) were used to perform landcover change analysis for the Gulf Coast region of Louisiana, Mississippi, and Alabama, in part to evaluate the impact of Hurricane Katrina. The raster datasets (images and grids) were processed at American Forests from imagery provided by Sanborn Map Company.

Landsat

This directory contains two 30 meter Landsat images in ERDAS Imagine .img format for 48 counties and parishes in the Gulf Coast region of Louisiana, Mississippi, and Alabama, for the years 2001 and 2006. The images were classified into 23 landcover classes using NOAA’s Coastal Change Analysis Program (C-CAP) system by Sanborn Map Company. The directory also contains four ArcInfo grids that were reconfigured from the above Landsat images for use in CITYgreen air quality and stormwater analysis. All are in the Albers Equal Area coordinate system with units of meters. Each contains a full metadata file that can be viewed in ArcCatalog.

GulfCoast_2001_NLCD_Landcover.img: This grid is a 2001 landcover image with 23 classes, available also from NOAA’s C-CAP program: (http://www.csc.noaa.gov/crs/lca/locateftp.html).

GulfCoast_2006_Landcover.img: This grid is a 2006 landcover image with 23 classes. It was created by Sanborn Map Company by comparing 2001 and 2006 imagery, and updating those areas that changed between the two years.

Gulf2001_AQ: This grid is the above 2001 landcover image reconfigured to 8 classes (Cropland, Open Space, Pasture, Shrub, Trees, Urban, Bare, and Water) for use in CITYgreen air quality analysis. Wetland classes were merged with their upland counterparts (forested wetlands with trees, scrub/shrub wetland with shrub, etc).

Gulf2001_SW: This grid is the above 2001 landcover image reconfigured to 7 classes (Cropland, Open Space, Pasture,Shrub, Trees, Urban, and Bare) for use in CITYgreen stormwater analysis. Water and wetland classes were reclassified to NODATA.

Gulf2006_AQ: This grid is the above 2006 landcover image reconfigured to 8 classes (Cropland, Open Space, Pasture,Shrub, Trees, Urban, Bare, and Water) for use in CITYgreen air quality analysis (forested wetlands with trees, scrub/shrub wetland with shrub, etc).

Gulf2006_SW: This grid is the above 2006 landcover image reconfigured to 7 classes (Cropland, Open Space, Pasture,Shrub, Trees, Urban, and Bare) for use in CITYgreen stormwater analysis. Water and wetland classes were reclassified to NODATA.

HighResolution

Thisdirectory contains four classified 1 meter ArcInfo grids. They wereoriginally IKONOS satellite images that were classified by Sanborn Map Company into 5 basic landcover classes and then reconfigured as ArcInfo grids to make the class names consistent with CITYgreen requirements (Impervious, Open, Trees, Bare, Water).All are in the Mississippi East State Plan coordinate system with units offeet. Each contains a full metadata file that can be viewed in ArcCatalog.

Bilx2005_aq: This grid covers a portion of the city of Biloxi between Back Bay of Biloxi and the Gulf of Mexico, and contains all fivelandcover classes to be used for CITYgreen air quality analysis.

Bilx2005_sw: This grid covers a portion of the city ofBiloxi between Back Bay of Biloxi and the Gulf of Mexico, and contains four landcover classes (Water was removed) to be used for CITYgreen stormwater analyses.

StLB2005_aq: This grid covers a 200 square mile drainage area for St Louis Bay, and contains all five landcover classes to be used for CITYgreen air quality analysis.

StLB2005_sw: This grid covers a 200 square mile drainagearea for St Louis Bay, and contains four landcover classes (Water was removed) to be used for CITYgreen stormwater analysis.

Attachments and Links

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