2000 Canopy Area Data

Land Use/Land Cover and Impervious Surface

About Data Attributes

To compute the area represented by each percentage of canopy surface, a raster attribute was added in which the acreage of the class value was multiplied by the class value.

Hence, the acreage of a 1% impervious surface Class Value is 1% of the total surface area of that class. Specifically, areas were calculated using the following formulae:

· Acres = Histogram * 0.222395

where Histogram is the total number of pixels in each class respectively 0.222395 is a constant representing the number of acres contained within each 30 m x 30 m pixel.

· Canopy_acres = Acres * (Class_value/100)

NOTE:  This table was created by selecting only 11 of the 100 possible Canopy percentage values for Baldwin County.