Pervasive developmental disorders: Types list. The list of types of Pervasive developmental disorders mentioned in various sources includes: 1  Autism. 2  Asperger syndrome. 3  Childhood disintegrative disorder. 4  Rett's syndrome. 5  Pervasive developmental disorder not otherwise specified (PDDNOS) - also called atypical autism.
Mercator Projection. The Mercator projection is a map projection that was widely used for navigation since loxodromes are straight lines (although great circles are curved). The following equations place the x-axis of the projection on the equator and the y-axis at longitude, where is the longitude and is the latitude. (1). (2).
In the Mercator projection (c. 1569), Greenland, which has 0.8 million square miles, is shown as being equal to Africa, which has 11.6 million square miles. The Mercator projection creates increasing distortions of size as you move away from the equator. As you get closer to the poles the distortion becomes severe.