"shade" means that there is no "direct" sunlight on that spot. Some object is in the way blocking the sun. If you were to go the a spot shaded on this map at th

"shade" means that there is no "direct" sunlight on that spot. Some object is in the way blocking the sun. If you were to go the a spot shaded on this map at the given time (and lay your eye at ground level), you should not see the sun (+/- 2 minutes or so because the suns disk is not a point as this model approximates)