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 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 Stress 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)
* Wind speed


De  overlays are calculated by our cuda module.
The selectable modules are:
* [[DPRA Heat Stress Module]]. This module is more detailed and based on the 2019 {{Heat DPRA Report}}. It can generate multiple Heat Stress Overlay [[Result types (Heat Stress 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 Stress 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 Stress 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 Stress Overlay)]]
|api=
* [[Api session event editor overlay add|Add Overlay]]
* [[Api session event editor overlay set attribute|Set Attribute]]
* [[Api session event editor overlay set heat model|Set Model: DPRA or UNESCO]]
}}


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:
* Based on the BGT (buildings that represent trees). Tree height multiplied by 'tree crown factor' determines wheterh the surrounding cells are in the shade.
* Area geometries can be added from geojson or  WFS service: this data must contain the tree height per area.
* A Geotiff can be added which contains the tree height per cell


==Calculations==
{{HeatOverlay result type nav}}
Heat is calculated in accordance to the Dutch standard for heat stress:
{{Overlay nav}}
https://ruimtelijkeadaptatie.nl/stresstest/bijsluiter/hitte/
[[Category:Overlays with result types]]
 
==How-to's==
* [[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 12:29, 14 April 2026

Example of the DPRA heat stress overlay

The 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 Stress Overlay Wizard.

The selectable modules are:

Example of the UNESCO heat stress overlay
Heat Stress Module
Tutorials
Overview
Theory
Benchmarks

Notes

How-to's

See also

API Endpoints


Heat Stress Module
Heat Stress Module
Tutorials
Overview
Theory
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 • Overlay Type • Parent • Result Child • Result Parent • Result type
Default
City
Administrative
Ownership • Ownership Grid • Zipcodes • Zoning • Neighborhoods • Municipalities • Scenario
Environmental
Heat Stress • Shadow • Traffic Density • Traffic Noise • Traffic NO2 • Livability
Water
Rainfall • Flooding • Groundwater • 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 • Building Floors • Underground • Source
Network
Network Distance • Network Overview • Network Ownership
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