An empty classroom.

Classroom

An empty classroom.

An illustration of a topographic map using conventional symbols commonly used in drafting and map drawing.

Topographic Map

An illustration of a topographic map using conventional symbols commonly used in drafting and map drawing.

An architect's landscape map of a Texas Park illustrating a combination of conventional topographic map symbols.

Topographic Architect Map

An architect's landscape map of a Texas Park illustrating a combination of conventional topographic…

"The Pantograph, or Pantagraph, is an instrument used in copying plans, maps, and other drawings, so that the copy may be either similar to, or larger or smaller than the original."—(Charles Leonard-Stuart, 1911)

Pantograph

"The Pantograph, or Pantagraph, is an instrument used in copying plans, maps, and other drawings, so…

A profile is cross sectional view, or side view, showing elevation at a given distance. The illustration shows both profiles with and without vertical exaggeration. A profile with vertical exaggeration is useful to distinguish the elevation of the land.

Topographic Profiles

A profile is cross sectional view, or side view, showing elevation at a given distance. The illustration…

Claudius Ptolemaeus, known as Ptolemy, was an ancient geographer, astrologer, and astronomer.

Ptolemy

Claudius Ptolemaeus, known as Ptolemy, was an ancient geographer, astrologer, and astronomer.

Claudius Ptolemaeus, known as Ptolemy, was an ancient geographer, astrologer, and astronomer.

Ptolemy

Claudius Ptolemaeus, known as Ptolemy, was an ancient geographer, astrologer, and astronomer.