Why is the aerial photo image fuzzy?
A digital photograph, such as any of the aerial photographs in iMAP, is composed of a grid of squares of various colors and shades. Each of these squares is called a pixel. The smaller the squares (pixels), the more detail the photograph can show. For example, the Emerge 2000 photos have a 2-foot resolution, which means that each pixel in the image represents a 2-foot square (an area of 4 square feet) on the ground. If your house were to measure 40 by 30 feet on the ground, it’s size in an Emerge photo would be 20 by 15 pixels. Thats not very much. And, since the pixel resolution of the aerial photos is fixed, when you zoom in beyond that resolution, you won’t see more detail, just bigger squares. To illustrate, the image below depicts a famous historical figure in a 16-by-16-pixel area. Can you tell who it is? Assume that this image is already at the maximum available resolution. Now hover your mouse over the picture to simulate a 5x enlargement. Doesn’t really help, does it? The pict
