Conclusion for geo project on maps
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1. Map Projections
Map projections and coordinate system in mapping are important for position specification on the earth, which is transferred to flat map. The coordinate system enables us to know material’s point and position on the earth through Meridian Line dividing the earth into parts based on angular distance or meridian called Geographic Coordinates.
The Geographic Coordinates are transferred to map through three-dimension and two-dimension vector systems. Several types of map projections present different characteristics: area keeping, shape and directions influencing on selecting consideration in using it to present different types of map data in different areas and content. Map projections are different due to different types of lines: plane, funnel-shaped and cylinder, including characteristics of light source that affects different characteristics of map projections and is used to consider appropriate mapping. The popular map projection is Universal Transverse Mercator (UTM), which is from the use of cylinder as map projection with globe model on the Meridian line. It is used to correctly present long north-south area. This type of projections is used in UTM coordinate system in making geographic map and base map in all around the world.
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