geodev-hackerlabs

Filter Data

The ArcGIS Online Map Viewer allows you to filter your data by multiple criteria. This allows you to limit which features draw and focus on only certain subsets of your data that are of interest to you. In addition, Analysis Tools take note of current filters when generating their output.

In this lab you will focus in on Rail Stops on the Blue Line and generate buffers around only those stops.

Steps

1. Go to www.arcgis.com and login.

2. Use Search > Search for Layers to find the PDX_Rail_Stops layer by al_geodev.

3. Click Open > Add layer to new map.

NOTE: If you are having difficulty finding it, just click this link.

1. Click PDX Rail Stops > Filter. Note you have two dropdowns and a text field. The text field has 3 radio buttons below it.

   1. Pick LINE in the first dropdown.

   2. Pick contains in the second dropdown.

   3. Type B into the text field (this is how the data is encoded for the Blue Line).

   4. Click Apply Filter.

2. Click PDX Rail Stops > Perform Analysis > Use Proximity > Create Buffers.

   1. Choose to buffer by Distance and set the size to 1 Miles.

   2. Expand the Options and select Dissolve.

   3. Set the Result layer name to 1 Mile Radius from Rail Stops.

   4. Clear the Use current map extent checkbox.

   5. Click Run Analysis.

3. Drag the PDX Rail Stops layer to the top of the layers list.

Your map should look something like this map. See how buffers were only calculated for stations on the B (Blue) line.

Bonus

• Try filtering by TYPE, is and selecting Unique from the Value radio buttons. What happens to the text box?
• See if you can show only Rail Stops that are under construction (STATUS is not Existing).
• Remove all filters.
• Add multiple filters or filter sets. Try:
  • LINE contains R combined with either:
    • STATUS is Existing, or
    • STATUS is not Existing.

More Bonus

• You can click Details > PDX Rail Stops > Save Layer to save this filtered “view” on the layer to your My Content space in your account. Perhaps name it PDX Blue Line Stops. This new item will point to the same unfiltered data source, but when added to the ArcGIS Online Map Viewer, will automatically filter according to the saved definitions. You can share these items with colleagues and users as a great way for them to bring focused content from a larger dataset into their own maps.