Coordinate system and map projection making pdf

Work undertaken in the usa and ussr on the creation of suitable map projections obtained through numerical analysis has been included. Coordinate systems, map projections, and geographic datum. Learning the basic properties and uses of coordinate systems understanding the difference between geographic coordinates and projected coordinates getting familiar with different types of map projections managing and troubleshooting coordinate systems of feature classes and images. If layers in a map have different coordinate systems defined from those of the map or. Most often maps and gis data are displayed on flat surfaces, be it a paper. Make a readwrite copy on your hard drive of the data. The data frames coordinate system need not be the same as the data you are using, although if arcmap has to project your data on the fly, it can take longer to draw. The coordinate system is one of the most important properties of your data frame. Ellipsoidal coordinate systems reference a mathematically derived spheroidal or ellipsoidal volumetric surface. Rightclick the data frame name and choose properties to bring up the data frame properties dialog box. Download the list of supported geographic and vertical coordinate systems. Map projections and coordinate systems gis courses.

Projected coordinate systems are derived from map projections and geographic. Geodesy, coordinate systems, and map projections objectives introduce the main concepts of geodesy coordinate systems, datums, ellipsoids, and geoids describe map projections and coordinate systems we use in gis two key questions what is the shape of the earth, and where are things on the earth. Working with map projections and coordinate systems. Making sure your gis data is in the right place on the map. Specifying a coordinate systemhelp arcgis for desktop. It determines the map projection for the map display in the data frame. A clear understanding of the different coordinate systems and datums in use today and the appropriate transformations between these is therefore essential to ensure rigorous consideration of. In this series, we talk about the basics of map projections, including coordinate systems and datums.

Coordinate systems, projections, and transformations. Learn what a map projection is, why they are used and what impact they have on maps gis systems. The objective of this section is to describe and discuss the concepts of map scale, coordinate systems, and map projections and explain why they are central to maps, mapping, and geographic information systems giss. A projected coordinate system based on a map projection such as transverse. Projection is used widely in cartography, land information system, remote sensing and gis. Click the coordinate system tab and navigate to the desired coordinate system for your map display. Different values for these parameters give different values for the coordinates, so even though we may have the same kind of projection transverse mercator, we. Coordinate systems and map projections sciencedirect. Projections, datums and coordinate systems in australia. Coordinate systems, projections, and transformationsproperties of. Map projections explained a beginners guide youtube. The create custom geographic transformation tool can also be.

Projected coordinate systems are referred to as map projections. A projected or planimetric coordinate system that maps locations on the earths three. Although the earth is best represented by a spheroid, the earth is sometimes treated as a sphere to make mathematical calculations easier. A projection is the means by which you display the coordinate system and your data on a flat surface, such as a piece of paper or a digital screen. Analytical derivation of some map projections including examples of pseudocylindrical and polyconic projections is also covered.