What is true about map projections? They show flat surfaces in a curved manner. They all distort some part of the earth's surface. They show the true scale of all of earth's features. They were developed by early historians.
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Map projections
Explanation:
- A map projection is one of many ways to depict the three-dimensional surface of the earth or another spherical body on a two-dimensional plane in cartography (mapmaking).
- This is normally a mathematical operation, but it isn't necessarily (some methods are graphically based).
- The process of creating a map projection is broken down into three steps, each of which loses data:
- Converting geographic coordinates (longitude and latitude) to plane coordinates for the earth or a circular body (choosing between a sphere or an ellipsoid) (eastings and northings).
- A map viewer is considered to have an orthogonal perspective of the map (that is, they are looking straight down).
- A surface that can be transformed into another surface without stretching, tearing, or shrinking is referred to as a "applicable surface."
- Any attempt to project a sphere or an ellipsoid on a flat sheet will distort the image since they cannot be projected on a plane surface (similar to the impossibility of making a flat sheet from an orange peel).
- A developable surface is one that can be stretched, ripped, or shrunk into a flat plane or sheet without stretching, tearing, or shrinking.
- The cylinder, cone, and, of course, the globe can be unfolded into a flat sheet without affecting the projected image (though the original projection of the earth's surface on the cylinder or cone would be altered).
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