Human visual cortex comprises 4-6. billion neurons that are organized into more than a dozen distinct functional areas. These areas include the gray matter in the occipital lobe and extend into the temporal and parietal lobes. The locations of these areas in the intact human cortex can be identified by measuring visual field maps. The neurons within these areas have a variety of different stimulus response properties. We describe how to measure these visual field maps, their locations, and their overall organization. We then consider how information about patterns, objects, colors, and motion is analyzed and represented in these maps.