Contents
- 1 How are map projections and distortions related to each other?
- 2 How is the relationship between the globe and the projection?
- 3 Why is it important to understand projections and coordinate systems?
- 4 Where can I find a map projection map?
- 5 How is the Transverse Mercator projection used in geography?
Map projections and distortion Converting a sphere to a flat surface results in distortion. This is the most profound single fact about map projections—they distort the world—a fact that you will investigate in more detail in Module 4, Understanding and Controlling Distortion.
How is the relationship between the globe and the projection?
The relationship between the globe and the projection is enhanced by the use of explicit visualization of the intermediate developable geometric shapes used in the projection. A tool is built on top of the Interactive Map Projections system that provides a new method of visualizing map projection distortion.
What happens when distortion is minimized in a projection?
Whenever one type of distortion is minimized, there will be corresponding increases in the distortion of one or more of the other properties. There are names for the different classes of projections that minimize distortion.
Why is it important to understand projections and coordinate systems?
Understanding projections and coordinate systems important knowledge to have, especially if you deal with many different sets of data that come from different sources. Projections Distortion Coordinate Systems Datums
https://www.youtube.com/watch?v=Qw7zLZz8YtI
Map projections and distortion Map projections and distortion Converting a sphere to a flat surface results in distortion. This is the most profound single fact about map projections—they distort the world—a fact that you will investigate in more detail in Module 4, Understanding and Controlling Distortion.
Where can I find a map projection map?
Map Projections map, Department of the Interior, U.S. Geological Survey Mapping Division, 1989, GRMC, University Libraries, Ball State University. Mercator projection: World Heritage Map, 2001, GRMC, University Libraries, Ball State University.
How are the properties of a projection chosen?
Angles, areas, directions, shapes, and distances can become distorted when transformed from a curved surface to a plane. Different projections have been designed where the distortion in one property is minimized, while other properties become more distorted. So map projections are chosen based on the purposes of the map.
How is the Transverse Mercator projection used in geography?
Distortion of scale, distance, direction and area increase away from the central meridian. The Universal Transverse Mercator (UTM) projection is used to define horizontal positions worldwide by dividing the earth’s surface into 6-degree zones, each mapped by the Transverse Mercator projection with a central meridian in the center of the zone.