Adding a redline boundary

You can easily add and configure different boundaries in Coreo. There are two main steps to this:

  1. Upload the boundary to your project using the Coreo Admin Area (
  2. Configure the boundary to display the way you prefer in the Map Builder section.

Uploading your boundary file

Coreo accepts both shapefile and GeoJSON formats. In this example we’ll upload a shapefile.

  • First, navigate to the project you want to show a redline boundary for.
  • Visit Configuration > Collections
  • Select New Collection and then the relevant option from the Create Collection dialogue, which is “From Shapefile (Zipped)” in this case.
shapefile option
  • Provide a name for your collection and then navigate to the relevant file on your computer.
  • Coreo will then ask you to provide a Key and Value for the shapefile. The Key must be a column that contains unique values for each record, but as you’re probably just importing a single area at this point it should be okay to select any column from the list.
shapefile dialogue
  • Once you’ve imported your shapefile, you will see it appear in the collection.
shapefile imported

You’re now ready to customise how your redline boundary will look in the app.

  • Navigate back to the Configuration menu using the side panel or breadcrumb trail at the top of your screen.
  • Select the Map Builder option from the menu.
Map config

When you first arrive in the Map Builder you’ll see a globe view of the world map on the right and any layers you have to apply a style to on the left.

Map config

Now that you have uploaded your redline boundary shapefile you should see this has appeared in the Form Layers section. There are now two steps to activate and view the boundary.

  • Firstly, select the “Enabled” tick box to activate the layer and its styling features.
Map config
  • Secondly, click the Zoom to Layer icon to focus the boundary on the map. This will enable you to see your changes in real time.
Map config

Depending on your default settings you will see something similar to the image below:

Map config
  • Choose the “Primary color” swatch to select the base colour for your layer. In this example we have selected red.
Map config
  • Now select the border colour you’d like. As this is a redline boundary we’ve chosen red again here.
Map config
  • If you just want to see the outline and no fill, in the Polygon section set the Fill Opacity to 0
  • Increase the Border Width if you would like to make your polygon border more obvious.

Your redline boundary configuration is now complete.

  • Use the Save Changes button to save your edits.
Map config

We will now have a look at this boundary in the Coreo app.

Viewing your redline boundary in the Coreo app

To view your new redline boundary in the Coreo app, visit the relevant project and select the Layer Switcher icon.

Layer switcher
  • Scroll to the bottom of the window until you see the Map Layers section. Toggle the required layer (in this case “Redline boundary”) to be visible.
Map layers
  • Tap back onto the map to dismiss the Layer Switcher and your redline boundary will now be visible on the map.
Final redline boundary
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