Map Distortion
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Distortion Patterns Animated World Map Stock Footage Video 100 Royalty Free 12304439 Shutterstock
All of us have seen a world map at some point in our lives before but it is very difficult to imagine how certain countries and parts of the world compare to each other in size that are far apart.
Map distortion. Map projections and distortion. Converting a sphere to a flat surface results in distortion. This is the most profound single fact about map projectionsthey distort the worlda fact that you will investigate in more detail in module 4 understanding and controlling distortion.
Imagine a map projection as an attempt to reconstruct your face in two dimensions. Drag and drop countries around the map to compare their relative size. Is greenland really as big as all of africa.
You may be surprised at what you find. A great tool for educators. Reference maps of the world often appear on compromise projections.
Due to distortions inherent in any map of the world the choice of projection becomes largely one of aesthetics. Thematic maps normally require an equal area projection so that phenomena per unit area are shown in correct proportion. Map projections types and distortion patterns.
The shape of the earth is represented as a sphere. It is also modeled more accurately as an oblate spheroid or an ellipsoida globe is a scaled down model of the earth. Although they can represent size shape distance and directions of the earth features with reasonable accuracy globes are not practical or suitable for many applications.
A distortion on a map is when you transfer information from a curved suface to a flat suface losing some accuracy. Distortion is a change in shape size or position of a place when its shown on. Email tweet share share on facebook pin pocket whatsapp telegram 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. My article is not to discuss the benefits of map projections but to look at how technology is contributing. Tissots indicatrix and map distortion.
There really is no one best map projection. Each map projection distorts shape distance direction scale or area and cannot preserve all map properties at the same time. Distortion occurs when the transfer function f is more complicated than this.
If f is a linear function for instance a filter whose gain andor delay varies with frequency the signal suffers linear distortion. Linear distortion does not introduce new frequency components to a signal but does alter the balance of existing ones. Ap human geography 01 geographic tools.
Terms in this set 34 distortion. Disadvantages for maps depicting the entire world of the. Shape distance relative size and direction of places on maps.
A map that has been simplified to present a single.
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