Now you are ready to reproject your data. In either ArcMap or ArcCatalog start ArcToolbox. Click the plus sign next to Data Management Tools and again next to Projections and Transformations. 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. Now you are ready to reproject your data. In either ArcMap or ArcCatalog start ArcToolbox. Click the plus sign next to Data Management Tools and again next to Projections and Transformations. 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). 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. by clicking on the button that looks like a hand holding a sheet of paper next to 'Output Coordinate System' (the blue arrow below). By clicking on the button next to 'Outout Coordinate System' a Spatial Reference Properties window will open. This is the same window that you use when 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' . If your coordinate system is Lat/Long choose 'Geographic Coordinates Systems', otherwise select 'Projected Coordinate Systems'. Source.


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Last Modified: April 22, 2016 @ 4:08 pm