but it cannot be used to calculate shoreline lengths, 

 bodies for plans can be calculated using MOSS. 



The actual shoreline perimeters of water 



Habitat Diversity Maps. Habitat diversity maps for 1956 and 1978 are generated in ERDAS using 

 the same techniques that produce the land/water interface density maps. The habitat diversity map 

 is a visual representation of habitat complexity. A 15x15 cell (150x150 m) roving window is used 

 to scan each cell within the plan. A value is assigned to the central cell based on the number of 

 different types of habitat cells occurring within the window as it moves through the map. The 

 greater the number of habitat types found within the window, the higher the habitat diversity for 

 that location. ERDAS then creates a map showing areas of high and low habitat diversity for the 

 plan. This type of map may be useful to plan managers for locating areas having the highest 

 habitat complexity. 



Classified Landsat Thematic Coverage of the Little Pecan Plan Wetland Management Plan. As 



mentioned previously, CMD has complete 1984 and partial 1986 classified Landsat Thematic 

 Mapper (TM) coverage of the coastal zone. This coverage was produced in-house by Decision 

 Associates, Inc., and by CMD technical personnel using ERDAS. The classified satellite data is 

 in cell form, has a resolution of 25 m, and consists of 14 classification categories. The 14 

 classification categories include out (background), water, broken marsh, marsh, forest, swamp, 

 shrub/scrub, ag/pasture, developed, inert, beach, clouds, floating vegetation, mixed vegetation, and 

 unclassified (unknown). 



Classified Landsat TM imagery for wetland management plans can easily be obtained from the 

 1984 or the 1986 (if available) coverage. Table 1 shows area statistics for 1984 classified Landsat 



Table 1. Habitat area statistics for the Little Pecan Lake Plan area. Totals and percentages are 

 based on non-zero points. 



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