Why are there different versions of the same map projection?
We have many different map projections because each has different patterns of distortion—there is more than one way to flatten an orange peel. Some projections can even preserve certain features of the Earth without distorting them, though they can’t preserve everything.
What are the four variables that will be distorted with different map projections?
There are four basic characteristics of a map that are distorted to some degree, depending on the map projection used. These characteristics include distance, direction, shape, and area.
How to compare map projections to the globe?
Give students the worksheet Comparing Map Projections to the Globe and the handout Map Projections. Have students analyze the three projections and the globe to note the distortions found. Have students also compare the size (that area is proportional) and the shapes of land and water on the maps with what they see on the globe.
What are some examples of projection in geography?
Have students create a visual display or bulletin board about the challenges cartographers have faced and the issues that different projections present. If time allows, have them include more projections, such as Mollweide (Interrupted), Goode’s (Interrupted), and the Winkel Tripel and also a Pacific-centered map and an upside down world map.
How to make a 3 D projection of a globe?
Divide students into small groups of three. Give each group one copy of the 3-page worksheet Map to Globe: 2-D to 3-D Models, scissors, and transparent tape. Have groups study these versions of the globe.
How to make a polygon to match a feature?
Click the Straight Segment construction method on the Editor toolbar. Click inside the polygon and digitize between the polygon and line. Snap to the line and click it once. Do not finish the sketch.