What are Bitmap Segments?
Bitmap segments are binary pseudo-images (raster grids) similar to image layers, and must have the same number of pixels and lines as other raster layers in the database however each pixel of the bitmap is only 1 bit. In other words, the DN value of the bitmap pixel can be either zero (pixel not “on”) or 1 (pixel “on”). Bitmap pixels with a value of 1 are visible (they take on the color of the graphic plane). The georeferencing associated with the raster layer is assumed to apply to bitmap layers as well. Bitmaps are used most commonly for delineating masks or creating training areas in classification.
