Coordinate Systems and Spatial Reference Background Coordinate systems allow geographic datasets to use common locations so that they can be viewed and used together. This is a big topic in itself read morebut to get it started, a coordinate system is a reference system used to represent locations within a common geographic framework. There are two types of coordinate systems. The other is a Projected Coordinate System PCS which provides various mechanisms to project the earth's spherical surface onto a two-dimensional plane.
Requirements for this tutorial: Secondly you need to know whether your data is in a vector or raster format. Vector data contains points, lines and polygons Raster data is a grid - where the grid cells are like pixels in a digital camera Thirdly you need to know what coordinate system and datum you want your data to be in.
It's usually a good idea to keep the datum the same between the old and new coordinate system. Common coordinate system include: Now you are ready to reproject your data.
If your data is vector then click the plus sign next to feature and double click Project. If your data Projected coordinate system raster then click the plus sign next to raster and double click Project Raster.
Click to view larger image The windows for vector and raster data are quite similar: First select the shapefile that you would like to reproject, by clicking on the browse button next to "Input Dataset or Feature Class" Choose where you want to put your reprojected shapefile in the "Output Dataset or Feature Class".
It will automatically put the new shapefile into the same folder as your original shapefile. Make sure that you name the reprojected shapefile something that you will remember you may want to include the new coordinate system info.
Then you can select your new coordinate system by clicking on the button that looks like a hand holding a sheet of paper next to "Output Coordinate System" the blue arrow below.
If you are changing datums then you will need a Geographic Transformation - a pull down menu will be available at the right of the white box under "Geographic Transformation optional " so you can select one. Click to view larger image First select your "Input Raster" by clicking the browse button to the right.
Then select where your "Output Raster" will be saved, and name it appropriately. The Output cell size is optional, and should be automatically filled in for you.
This is the same window that you use when defining a coordinate system. In the spatial references window hit select to browse for a coordinate system. In the new window you'll have a choice of two folders - "Geographic Coordinates Systems" and "Projected Coordinate Systems".
Click Add, and OK on the spatial reference window, and again on the define projection window. It may take a short while to process and once your done the following window will appear: Provided by your Geospatial Support team from:A projected coordinate system is constituted by a geographic coordinate system from which it's project (GEOGCS) and other projection parameters like the measurment unit (UNIT) like meter or US Survey Foot), the projection and its project parameters.
Welcome to the EPSG Geodetic Parameter Dataset; The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry (pfmlures.com) or, as a downloadable zip files, through IOGP's EPSG home page at pfmlures.com geographic coverage of the data is worldwide, but it is .
B. Define the coordinate system of a coverage.
Your trusted colleague--s/he had better be--tells you that the coordinate system of the puerto_rico coverage is defined by the following. Projection: Albers Equal Area Conic. A projected coordinate system is always based on a geographic coordinate system that is based on a sphere or spheroid.
In a projected coordinate system, locations are identified by x,y coordinates on a grid, with the origin at the center of the grid. The latitude of the second point (Phi 2) of a projected coordinate system.
LongitudeOf1st The longitude of the first point (Lambda 1) of a projected coordinate system. Nov 09, · Hey everyone, I'm new to the world of GIS so I was somewhat confused when I saw the option of choosing from either a geographic coordinate system or projected coordinate system in arcMap.
My first layer is a Landsat 5 image that reads as being in WGS_84_UTM_zone_15_N, which is a projected coordinate system in pfmlures.coms: