Traffic NO2 Overlay: Difference between revisions

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{{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|}}
[[File:Traffic_NO2-Overlay.jpg|thumb|right|Traffic NO2 Overlay]]
==What is the Traffic NO2 overlay?==
The Traffic NO2 Overlay is a [[Grid Overlay]] which computes the impact of traffic air pollution (in μg/m³ NO2) for any given location in the [[project]]. The calculation takes into account the amount of traffic per [[type]] and the distance from the source of emission. It also takes into account [[Building|object]]s and [[Elevation model|terrain features]] which would hinder the travel of particles.


[[File:Traffic_NO2-Overlay.jpg|thumb|420px|left|Active Traffic NO2 air polution overlay]]
The Overlay only takes into account NO2 emissions from traffic. Other sources of emissions (such as air traffic of factories) are explicitly excluded.
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 (Overlay)|traffic flow]] and distance.  
<br clear=all>
===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)
<br clear=all>


==Additional information displayed in hover panel==
The Overlay implements SRM1{{ref|srm1}}, which is only applicable for urban environments.
[[File:Traffic_NO2-Hover.jpg|thumb|250px|left|Hover panel displays additional information]]
[[File:Traffic_NO2-Overlay-model.png|thumb|left|Traffic NO2 Model]]
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.
{{clear}}
<br clear=all>


==Adding and removing==
==Configuration==
{{main|Model attributes (Traffic NO2 Overlay)}}


{{Editor ribbon|header=Geo Data|bar=Overlays}}
The Traffic NO2 Overlay has a number of options which allow it to be configured as desired. A [[Traffic NO2 Overlay Wizard|configuration wizard]] is available.


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.
The following aspects can be configured:
* Base concentrations of NO2 and NOx
* Emissions per vehicle type both in motion and in traffic jam
* Constants for road-based dilution factors
* The hour(s) of the day to perform the calculation for


{{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}}
===Traffic===
Traffic intensities for each type of traffic can be based on one of the following:
* The [[Building attributes (Traffic NO2 Overlay)|Attributes of roads]] present in the [[project]].
* [[Prequels (Traffic NO2 Overlay)|Prequel Overlay]]s which define respective traffic intensities on a grid.


<gallery>
The traffic intensities can be defined as either a single value or as 24 hours, with each value corresponding to each hour of the day. The intensity used for the calculation is then defined by the [[Hours (Traffic NO2 Overlay)|HOURS model Attribute]].
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}}
==Calculation==
{{main|Traffic NO2 formula (Traffic NO2 Overlay)}}
The Traffic NO2 Overlay performs its calculations based on the [[Model attributes (Traffic NO2 Overlay)|Overlay's Attributes]], the presence of [[Building|trees]], and the [[Building attributes (Traffic NO2 Overlay)|Attributes of roads]] present in the [[project]]. The calculations follow the standard rekenmethode 1 (SRM 1){{ref|srm1}}.


<gallery>
==Results==
File:Select3DWorld.jpg|1. Select Geo Data
The following result types are available as output from the traffic NO2 calculations:
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'.''
{{result types|suppresscategory=true|allowselflinks=true|
{{:Concentration            result type (Traffic NO2 Overlay)}}
{{:Emission no2            result type (Traffic NO2 Overlay)}}
{{:Emission nox            result type (Traffic NO2 Overlay)}}
{{:Treefactor              result type (Traffic NO2 Overlay)}}
{{:Trees                    result type (Traffic NO2 Overlay)}}
}}
 
{{article end
|notes=
* The Overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government.{{ref|srm1}}.
|howtos=
* [[How to add and remove an Overlay]]
* [[How to edit an overlay legend]]
* [[How to add a static traffic model]]
* [[How to add a static grid-based traffic model]]
* [[How to add traffic data unaligned with roads]]
* [[How to add a dynamic traffic model]]
|references=
  <references>
    {{ref|srm1
      |name=SRM1
      |author=
      |page=
      |source=Regeling beoordeling luchtkwaliteit 2007, Bijlage I
      |link=http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1
      |lastvisit=16-02-2022
    }}
  </references>
}}
{{TrafficNO2Overlay nav}}
{{Overlay nav}}

Latest revision as of 08:27, 29 February 2024

Traffic NO2 Overlay

The Traffic NO2 Overlay is a Grid Overlay which computes the impact of traffic air pollution (in μg/m³ NO2) for any given location in the project. The calculation takes into account the amount of traffic per type and the distance from the source of emission. It also takes into account objects and terrain features which would hinder the travel of particles.

The Overlay only takes into account NO2 emissions from traffic. Other sources of emissions (such as air traffic of factories) are explicitly excluded.

The Overlay implements SRM1[1], which is only applicable for urban environments.

Traffic NO2 Model

Configuration

Main article: Model attributes (Traffic NO2 Overlay)

The Traffic NO2 Overlay has a number of options which allow it to be configured as desired. A configuration wizard is available.

The following aspects can be configured:

  • Base concentrations of NO2 and NOx
  • Emissions per vehicle type both in motion and in traffic jam
  • Constants for road-based dilution factors
  • The hour(s) of the day to perform the calculation for

Traffic

Traffic intensities for each type of traffic can be based on one of the following:

The traffic intensities can be defined as either a single value or as 24 hours, with each value corresponding to each hour of the day. The intensity used for the calculation is then defined by the HOURS model Attribute.

Calculation

Main article: Traffic NO2 formula (Traffic NO2 Overlay)

The Traffic NO2 Overlay performs its calculations based on the Overlay's Attributes, the presence of trees, and the Attributes of roads present in the project. The calculations follow the standard rekenmethode 1 (SRM 1)[1].

Results

The following result types are available as output from the traffic NO2 calculations:

Notes

  • The Overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government.[1].

How-to's

References

  1. 1.0 1.1 1.2 SRM1 ∙ Regeling beoordeling luchtkwaliteit 2007, Bijlage I ∙ Found at: http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1 ∙ (last visited: 16-02-2022)