View source for Traffic NO2 Overlay

{{learned|what the Traffic NO2 overlay is|which information is displayed on the Traffic NO2 overlay|which additional information is displayed in the hover panel|how to add or remove the Traffic NO2 overlay|}}
==What is the Traffic NO2 overlay?==

[[File:Traffic_NO2-Overlay.jpg|thumb|420px|left|Active Traffic NO2 air polution overlay]]
The Traffic NO2 overlay is an [[Overlay]] which displays the impact of traffic air polution (in &mu;g/m&sup3; nitrogen dioxide) in different colors for the project area. These colors indicate traffic air polution of a location based on [[Traffic Flow (Overlay)|traffic flow]] and distance. 
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===Traffic NO2 air polution overlay colors===
[[File:Traffic_NO2-Overlay_Legend.jpg|thumb|500px|right|Traffic NO2 overlay colors]]
Traffic NO2 air polution is indicated in red (= bad) and green (= good)
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==Additional information displayed in hover panel==
[[File:Traffic_NO2-Hover.jpg|thumb|250px|left|Hover panel displays additional information]]
The hover panel gives the actual air polution value (in &mu;g/m&sup3; nitrogen dioxide) for the selected location when the overlay is active.
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==Adding and removing==

{{Editor ribbon|header=Geo Data|bar=Overlays}}

Adding and removing overlays is a generic process, however, certain overlays are dependent on other assets being present too, such as indicators, terrains, vacancy, images, etc. For more information please refer to the respective main articles for the specific overlays.

{{Editor steps|title=add the Traffic NO2 overlay|Select in the editor 'Geo Data' from the ribbon|Select 'Overlays' > 'Edit overlays' from the ribbon bar|Select the Traffic NO2 overlay from the drop down menu on the bottom of the left panel|Select 'Add' from the bottom of the left panel|The overlay icon will now appear under the mini map}}

<gallery>
File:Select3DWorld.jpg|1. Select Geo Data
File:SelectEditOverlay.jpg|2. Select Overlays > Edit overlays
File:SelectDropDown.jpg|3. Select desired overlay from drop down menu on the bottom of the left panel
File:SelectAddOverlay.jpg|4. Select 'Add' from the bottom of the left panel
File:OverlayIconPresent.jpg|5. The overlay icon will  now appear under the mini map
</gallery>

{{Editor steps|title=remove an overlay|Select in the editor 'Geo Data' from the ribbon|Select 'Overlays' > 'Edit overlays' from the ribbon bar|Select the desired overlay from the list of active overlays on the left panel|Select 'remove' from the bottom of the left panel|Confirm the removal in the pop up confirmation message}}

<gallery>
File:Select3DWorld.jpg|1. Select Geo Data
File:SelectEditOverlay.jpg|2. Select Overlays > Edit overlays
File:SelectOverlay.jpg|3. Select desired overlay from the list of active overlays on the left panel
File:SelectRemoveOverlay.jpg|4. Select 'Remove' from the bottom of the left panel
File:ConfirmRemovalOverlay.jpg|5. Confirm the removal in the pop up confirmation message 
</gallery>

''Sometimes it can be convenient to duplicate an already existing overlay. To do so, follow the steps for removal, but select 'Duplicate' in stead of 'Remove'.''