Two different modern methods of map making include compilations of already existing material, and satellite or other aerial imaging. Compilation maps often try to capture a larger picture and must omit smaller details, largely due to discrepancies between existing material, while satellites and aerial imaging can focus on the minute details because they are original map creations.Know More
Compilation maps go through extensive selection processes for selecting material, creating both problems when there are discrepancies, as well as insight into changing geographies or perceptions. This method has the benefit, however, of being able to use maps with many different purposes to draw a larger picture. For example, soil maps, geologic maps and other thematic maps can all be compared to develop a final product.
Maps created from aerial imaging and satellites encounter other problems, such as a ridge of a mountain being seen in more detail on one side than another. If the terrain is too steep, one side of a mountain may not be seen at all. This problem is rectified by either compiling many aerial or satellite images, or comparing with already existing maps. However, technology for map making is constantly advancing, minimizing the possibility of error. A person who creates maps in this way is called a photogrammetrist.Learn more about Maps & Cartography
An elevation map reflects the elevation of the region being depicted; this is usually done using lines, shading and color patterns. 3D models of elevation maps provide higher resolution and more accurate data, according to the U.S. Geological Survey. Another term for an elevation map is a topographic map.Full Answer >
The main objective of a physical map is to show landforms, bodies of water and other geographical features. Features shown include mountains, deserts and lowlands as well as lakes, rivers and oceans.Full Answer >
A map key is a table that explains the various symbols used on that particular map. Another term for the map key is the map legend.Full Answer >
A map projection is a means of displaying a map of the Earth. Due to the fact that the planet is roughly spherical and three-dimensional, attempts to map it in two dimensions create distortions in direction, shape, area and distance.Full Answer >