Heat Stress Overlay: Difference between revisions

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We are working on a new heat module in accordance to the new Dutch DPRA standards. This module is still under construction, as is the documentation, however a Beta version of the module is available on the Preview server for our partners.  
[[File:DPRA_Heatstress_overlay.PNG|thumb|420px|right|Example of the DPRA heat stress overlay]]
The new Heat Stress [[Overlay]] module is in accordance with the 2019 {{Heat DPRA Report}}.


==Overlays==
==Modules==
Several overlays with data that influence heat are available :
In order to configure a Heat Stress Overlay, a module has to be selected. The module can be configured by opening the Heat Overlay Wizard.
* The PET map (real feel temperature, wind chill). In accordance to the DPRA guideline: https://ruimtelijkeadaptatie.nl/stresstest/bijsluiter/hitte/pet-hittekaart/
* Foliage (map with tree heights)
* Shade
* Average Sky View
*      Sky view (percentage sky view in relation to total view),
* UHI (Urban Heat Island effect)
*      Temperature of atmosphere
* Vegetation average
* Vegetation (yes/no))
* Bowen ratio (evaporation ratio): in the city a value of 3 is normal. For green that evaporates well or open water, a value of 0.4 is normal.  
* Wind speed


De  overlays are calculated by our cuda module.
The selectable modules are:
* [[DPRA Heat Module|DPRA Heat stress module]]. This module is more detailed and based on the 2019 {{Heat DPRA Report}}. It can generate multiple Heat Overlay [[Result types (Heat Overlay)|result types]] as child overlays;
* [[UNESCO Heat Module|UNESCO Heat stress module]]. This module generates a simple heat stress overlay which visualizes the [[Pet_relative_result_type_(Heat_Overlay)|Relative Physiological equivalent temperature]] result type. It uses a different (and smaller) set of formula's to calculate Heat differences. It does not calculate the expected Physiological Equivalent Temperature.


==Wizard==
[[File:Heatstress_overlay.PNG|thumb|420px|right|Example of the UNESCO heat stress overlay]]
The Heat Wizard is available in the [[Ribbon|Ribbon bar]].
{{Heat_Module_buttons}}
{{clear}}


In the first step data to determine the influence from the sun can be added.
{{article end
* Per date you can specify your hours of interest
|notes=
* For each hour you add weather and sun values
* The Heat Stress Overlay certain [[past projects]] used the [[UNESCO Heat Module]], rather than the [[DPRA Heat Module]], for legacy reasons.
* the sun angles (altitude en azimuth) can be calculated automatically based on the project location and time zone. The Platform collects data on the time zone based on project location.
|howtos=
* [[How to add and remove an Overlay]]
* [[How to edit an overlay legend]]
* [[How to use a Infrared WMS to estimate foliage height]]
* [[How to improve the estimated foliage overlay]]
* [[How to compute additional shadow effects for the Heat Stress Overlay]]
|seealso=
* [[FAQ (Heat Overlay)]]
}}


In Step 2 data is added to determine the influence of trees.  Trees are often only drawed and caculated by its trunk, however its crown is most important. That is why this module offers three options to choose from:
{{HeatOverlay result type nav}}
* Based on the BGT (buildings that represent trees). Tree height multiplied by 'tree crown factor' determines wheterh the surrounding cells are in the shade.
{{Overlay nav}}
* Area geometries can be added from geojson or  WFS service: this data must contain the tree height per area.
[[Category:Overlays with result types]]
* A Geotiff can be added which contains the tree height per cell
 
==Calculations==
Heat is calculated in accordance to the Dutch standard for heat stress:
https://ruimtelijkeadaptatie.nl/stresstest/bijsluiter/hitte/
For more detailed implementation we used RIVM-documentation:
https://www.rivm.nl/bibliotheek/rapporten/2019-0008.pdf
 
==Results==
With a Heat Overlay, one can generate different kinds of results. For further information about these outcomes, see also [[Results_(Heat_Overlay)|results]] and [[Result type (Heat Overlay)|result types]].
 
==How-to's==
* [[FAQ Heat (Overlay)|FAQ for Heat Overlay]]
* [[How-to add and remove an overlay|Add and remove an overlay]]
* [[How-to edit an overlay legend|Edit an overlay legend]]
 
{{Template:Overlay nav}}
 
\[[File:Heatstress_overlay.PNG|thumb|420px|right|Example of the heat stress overlay]]

Latest revision as of 08:40, 7 November 2024

Example of the DPRA heat stress overlay

The new Heat Stress Overlay module is in accordance with the 2019 DPRA Heat stress report.

Modules

In order to configure a Heat Stress Overlay, a module has to be selected. The module can be configured by opening the Heat Overlay Wizard.

The selectable modules are:

Example of the UNESCO heat stress overlay
Benchmarks button.png
Heat introduction button.png
Heat Module
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Getting started button.png
Tutorials
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Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
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Benchmarks

Notes

How-to's

See also

Heat Module
Benchmarks button.png
Heat introduction button.png
Heat Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
Benchmarks
Group
Result types
Atmospheric temperature • Bowen ratio • Foliage • Physiological equivalent temperature (PET) • Relative PET • Shade • Sky view •  Sky view average •  Urban heat island • Vegetation • Vegetation average • Wind speed
Related
Calculation models and formulas • Feature attributes • Model attributes • Result types


Overlays
Categorization
Grid • Parent • Result Child • Result Parent • Result type
Default
City
Administrative
Ownership • Ownership Grid • Zipcodes • Zoning • Neighborhoods • Municipalities • Vacancy
Environmental
Heat Stress • Traffic Density • Traffic Noise • Traffic NO2 • Livability
Water
Rainfall • Flooding • Groundwater • Subsidence • Watershed
Grid Calculation
Average • Combo • Distance • Sight Distance • Travel Distance • Inference • Iteration
Geo Data
GeoTIFF • WCS • WMS • Image • Area • Attribute • Function
Topography
Satellite • Digital Surface Model • Digital Terrain Model • Underground • Source
Network
Network Distance • Network Overview • Network Ownership
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