qgis - Convert Shape Length Area Data to Latitude Longitude

I am attempting to import publicly available shapefile data from http://gis.utah.gov/data/boundaries/zip-codes/ into Tableau for a data visualization project.

Unfortunately, the .shp file and .gdb database that are available for download include only the shape length / area for each of the Utah zip codes.

My goal is to convert these from the current NAD 1983 UTM 12N (EPSG: 26912) format into latitude / longitude coordinates that can be read into Tableau.

I am using Quantum GIS (QGIS 2.0.1) and would appreciate any and all help.

Answer

The layer is provided as a polygon so you'll need to convert the polygons to points and calculate the XYs of each point.

• Enable 'on the fly' CRS projections in Project Properties


• Ensure that the Selected CRS is the CRS you want to project the data to


• Add vector layer


• Right click layer and "Save vector layer as..."


• Select the CRS you want the layer exported to


• Save layer and re-add the layer to the project


• Convert the polygon to points using Vector-->Geometry Tools-->Extract nodes



• Ensure the points layer is added to the project


• Open Attributes table for point layer


• Toggle editing mode on


• Open field calculator


• Add two new calculated fields using the $x and $y funcitons under Geometry for each respective field


• Save edits and toggle off edit mode

This should give you a point file with the vertices for each polygon and the respective calcualted X and Y values for each point in the chosen CRS.