Model attributes (Heat Overlay): Difference between revisions
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| [[ | | [[Hourly humidity (Heat Overlay)|HOURLY_HUMIDITY]] | ||
| percentage | | percentage | ||
| The relative humidity of the air at this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | | The relative humidity of the air at this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | ||
|- | |- | ||
| [[ | | [[Hourly radiation (Heat Overlay)|HOURLY_RADIATION]] | ||
| Wm<sup>-2</sup> / hr | | Wm<sup>-2</sup> / hr | ||
| The amount of Sun radiation this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | | The amount of Sun radiation this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | ||
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| The temperature at this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | | The temperature at this hour, measured at a [[Weather station (Heat Overlay)|weather station]]. | ||
|- | |- | ||
| [[ | | [[Sun altitude (Heat Overlay)|SUN_ALTITUDE]] | ||
| ° | | ° | ||
| The sun angle up from the horizon. | | The sun angle up from the horizon. | ||
|- | |- | ||
| [[ | | [[Sun azimuth (Heat Overlay)|SUN_AZIMUTH]] | ||
| [[Geo angle]] | | [[Geo angle]] | ||
| The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion | | The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion | ||
|- | |- | ||
| [[ | | [[Sun daily motion (Heat Overlay)|SUN_DAILY_MOTION]] | ||
| factor | | factor | ||
| A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value. | | A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value. | ||
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==Notes== | ==Notes== | ||
* The model relies on a number of attributes which can be measured by measure stations. For any given project, it is recommended to find data from a (reference) weather station applicable to the project area, and use those values as parameters for the Heat Module calculations. | * The model relies on a number of attributes which can be measured by measure stations. For any given project, it is recommended to find data from a (reference) weather station applicable to the project area, and use those values as parameters for the Heat Module calculations. | ||
* When the [[ | * When the [[Dates (Heat Overlay)|DATES]] attribute is configured for multiple timeframes, the Hourly, Sun, and Wind attributes should have an equal amount of entries. When using the Heat Overlay configuration wizard, the necessary entries are created automatically. | ||
==See also== | ==See also== | ||
Revision as of 10:29, 17 December 2019
The heat overlay's model calculations depend on a number of calculation-wide parameters. These parameters are available as attributes of the heat overlay and can be modified as such.
| Attribute | Unit | Description |
|---|---|---|
| AVERAGED_LAST_RESULT | boolean | Whether to ignore the date-time setting for the last calculated timeframe, and show an average of the results of all preceding timeframes instead. |
| DAILY_AVG_RADIATION | Wm-2 / hr | The average of amount of sun radiation per hour per square meter for this day, measured at a weather station. |
| DAILY_AVG_WIND_SPEED | m/s | The daily average wind speed measured at a weather station at the height of 10 meters above ground. |
| DAILY_TEMPERATURE_MAX | °C | Maximum temperature measured at a weather station. |
| DAILY_TEMPERATURE_MIN | °C | Minimum temperature measured at a weather station. |
| DATES | timestamp | Dates define the amount of timeframes and are used to define the day and time for calculating sun angles. |
| EXCLUDE_BUILDINGS | boolean | |
| EXCLUDE_WATER | boolean | |
| FOLIAGE_AREAS | boolean | |
| HOURLY_HUMIDITY | percentage | The relative humidity of the air at this hour, measured at a weather station. |
| HOURLY_RADIATION | Wm-2 / hr | The amount of Sun radiation this hour, measured at a weather station. |
| HOURLY_TEMPERATURE | °C | The temperature at this hour, measured at a weather station. |
| SUN_ALTITUDE | ° | The sun angle up from the horizon. |
| SUN_AZIMUTH | Geo angle | The angle along the horizon, with 0° corresponding to north, and increasing in a clockwise fashion |
| SUN_DAILY_MOTION | factor | A factor used in calculating the Atmospheric Temperature from the calculated Urban Heat Island value. |
| WIND_DIRECTION | Geo angle | The wind direction viewed from above, with 0° corresponding to north, and increasing in a clockwise fashion. |
| WIND_SPEED | m/s | The wind speed measured at a weather station at the height of 10 meters above ground. |
Notes
- The model relies on a number of attributes which can be measured by measure stations. For any given project, it is recommended to find data from a (reference) weather station applicable to the project area, and use those values as parameters for the Heat Module calculations.
- When the DATES attribute is configured for multiple timeframes, the Hourly, Sun, and Wind attributes should have an equal amount of entries. When using the Heat Overlay configuration wizard, the necessary entries are created automatically.
See also
- Group
- Model attributes
- Daily average radiation • Daily average wind speed • Daily maximum temperature • Daily minimum temperature • Dates • Exclude buildings • Exclude water • Exclude foliage height m • Foliage areas • Hourly humidity • Hourly radiation • Hourly temperature • Max shadow distance • Sun altitude • Sun azimuth • Sun daily motion • Wind direction • Wind speed • Wind decline angle
- Building attributes
- Building elevation • Foliage height • Terrain elevation
- Related