 Mapping in QGIS, Joining Data Sets. Let's join the data we have in a CSV table to the spatial data within our feature class. Open both tables and set them side by side to determine a common field. In this case, column 0 and the Census Forward Sortation Area Unique Identifier contains the same values and are of the same data type. To join the data sets, select Processing from the top menu, select Toolbox, and search for Join in the search bar. Double-click the Join Attributes by Field Value tool. Under Input Layer, select the spatial layer by using the drop-down arrow. Under Table Field, ensure the correct field is selected. If not, use the drop-down arrow to select from the fields in the layer. In this case, the Census Forward Sortation Area identifier. Under Input Layer 2, input the table. Under Table Field 2, select the corresponding field. In this case, column 0. Keep the join type as take attributes of the first matching feature only, 1 to 1. You have the option to create a temporary scratch layer by not saving the file. If you change your mind later on, you can do so by selecting the temporary scratch layer icon. To save the output immediately, select the Browse icon next to Join Layer and save it to your desired location. Select Run and Close. You now have your join data sets. For more information on QGIS, visit the UTM Library QGIS playlist.