Traffic NO2 Overlay: Difference between revisions

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===Traffic NO2 air polution overlay colors===
===Traffic NO2 air polution overlay colors===
[[File:Traffic_NO2-Overlay_Legend.jpg|thumb|500px|right|Traffic NO2 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)
<br clear=all>


==Additional information displayed in hover panel==
==Calculations==
[[File:Traffic_NO2-Hover.jpg|thumb|250px|left|Hover panel displays additional information]]
The calculations follow the standard rekenmethode 1 (SRM 1), as described on [http://wetten.overheid.nl/BWBR0022817/2013-03-22]:
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.
<br clear=all>


==Adding and removing==
Cjm = Ca,jm + Cb,jm


{{Editor ribbon|header=Geo Data|bar=Overlays}}
where:
* Cjm = yearly average concentration [μg/m3]
* Ca,jm = yearly average background-concentration (default = 0 [μg/m3], can be adjusted via the overlay attributes)
* Cb,jm = yearly average traffic contribution to NO2 concentration [μg/m3]


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}}
Cb,jm = Fk * E * θ * Fb * Fmeteo


<gallery>
where:
File:Select3DWorld.jpg|1. Select Geo Data
* Fk = calibration factor [-] (default = 0.62)
File:SelectEditOverlay.jpg|2. Select Overlays > Edit overlays
* E = Emission number, depending on traffic [μg/m/s]
File:SelectDropDown.jpg|3. Select desired overlay from drop down menu on the bottom of the left panel
* θ = Delution factor [-] (default = XXX)
File:SelectAddOverlay.jpg|4. Select 'Add' from the bottom of the left panel
* Fb = Treefactor [-]
File:OverlayIconPresent.jpg|5. The overlay icon will  now appear under the mini map
* Fmeteo = 5/windspeed. Default windspeed is 5 m/s
</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'.''


==References==
==References==
The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: [http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1 wetten.overheid.nl]
The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: [http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1 wetten.overheid.nl]

Revision as of 12:03, 13 June 2018

Template:Learned

What is the Traffic NO2 overlay?

Active Traffic NO2 air polution overlay

The Traffic NO2 overlay is an Overlay which displays the impact of traffic air polution (in μg/m³ nitrogen dioxide) in different colors for the project area. These colors indicate traffic air polution of a location based on traffic flow and distance.

Traffic NO2 air polution overlay colors

File:Traffic NO2-Overlay Legend.jpg
Traffic NO2 overlay colors

Calculations

The calculations follow the standard rekenmethode 1 (SRM 1), as described on [1]:

Cjm = Ca,jm + Cb,jm

where:

  • Cjm = yearly average concentration [μg/m3]
  • Ca,jm = yearly average background-concentration (default = 0 [μg/m3], can be adjusted via the overlay attributes)
  • Cb,jm = yearly average traffic contribution to NO2 concentration [μg/m3]


Cb,jm = Fk * E * θ * Fb * Fmeteo

where:

  • Fk = calibration factor [-] (default = 0.62)
  • E = Emission number, depending on traffic [μg/m/s]
  • θ = Delution factor [-] (default = XXX)
  • Fb = Treefactor [-]
  • Fmeteo = 5/windspeed. Default windspeed is 5 m/s

References

The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: wetten.overheid.nl

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