Heat Stress Overlay: Difference between revisions

From Tygron Preview Support Wiki
Jump to navigation Jump to search
No edit summary
Line 16: Line 16:


De  overlays are calculated by our cuda module.
De  overlays are calculated by our cuda module.
==Wizard==
The Heat Wizard is available in the [[Ribbon|Ribbon bar]].
In the first step data to determine the influence from the sun can be added.
* Per date you can specify your hours of interest
* For each hour you add weather and sun values
* 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.
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==
==Calculations==

Revision as of 12:21, 11 September 2019

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.

Overlays

Several overlays with data that influence heat are available :

  • 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.

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 result types.

How-to's

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


\

Example of the heat stress overlay
Retrieved from "https://previewsupport.tygron.com/w/index.php?title=Heat_Stress_Overlay&oldid=27046"