Layer Styling By Attribute

A quick glance should give you valuable information

Your data can be very accurate and timely, but it is as important for you to convey the underlying information to your users in the simplest and most impactful way.

Even though it is easy to see what city areas are covered, but with the current default layer styling we are not able to quickly understand which areas are more vulnerable to floods.

muito elevada — Very high

elevada — High risk

moderada — Moderate risk

Any other value means low or no flood risk at all.

The initial style you see is the style that will be applied to all features which will not match the attribute values you define here. So, let’s add our attribute styling, by selecting vulnerabil from the attribute dropdown list and clicking on the (+) button to add the first style rule.

Make sure you select “EQUAL TO” in the operators dropdown list, type muito elevada for its value, and select a vivid red color for both the polygon border and the fill (it’s for very high flood risk areas, after all).

Click again on the (+) button to add the second style rule, and in the newly created rule configuration, make sure you select “EQUAL TO” in the operators dropdown list, type elevada for its value, and select an orange color (it will represent high flood risk areas). It should look like the example below.

Click once more on the (+) button to add the third style rule, and in the newly created rule configuration, make sure you select “EQUAL TO” in the operators dropdown list, type moderada for its value, and select a lighter color (it will represent moderate flood risk areas). It should look like the example below.

Save the changes to the layer, click on the Preview tab, and you should have a much more informative and colorful representation of your data.

I hope you enjoyed this walkthrough and can now see the amazing and powerful role of layer styles in Mapify !

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