08_viewing_data.Rmd

# Viewing a Query to QGIS

You don't have to save a query as a table to view it in QGIS.  Sometimes you just want to see the results, but don't need to keep a table that you might not need later.  Let's see the spatial join we just did in the QGIS map canvas:

1. After you run the code to do the spatial join above, you will see a check box below the table that says *Load as new layer*.  Click in the box to check it off.  New options will appear.
1. Check the box next to  *Column with unique values* and select *id* from the list.
1. Check the box next to *Geometry column* and select *geom* from the list.
1. Fill in the *Layer name (prefix)* with "Flowlines in Watersheds".
1. Click the *Load* button.  It may take it a few minutes to load because the *flowlines* layer is large.

Now you have access to the *Layer Properties* and all the other tools you might use with any other vector layer in QGIS.  For fun, let's style this layer:

1. Open up the *Layer Properties* (right click on the layer in the *Layers Panel* and select *Properties*).
1. Click on the *Symbology* tab.
1. Instead of *Single Symbol*, let's pick *Categorized* from the top drop-down menu.
1. For the *Column*, pick *Watershed_Name*
1. Click the *Classify* button near the bottom.
1. Finally, click *OK* to close the dialog and apply our changes.