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0 | Dragonfly


1 \| Urban Weather

2 | Alternative Climate Data

3 | Envimet

4 | Developers

City From Parameters

Use this component to generate a Dragonfly City object from numerical parameters like building height and site coverage ratio.
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The ouput of this component can be plugged into the 'Dragonfly_Run Urban Weather Generator' component to morph a rural/airport weather file to reflect the urban climate.
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Provided by Dragonfly 0.0.03

Inputs

Name	ID	Description	Type
avg_height	_avg_height	The average height of the buildings in the city in meters.	Goo
site_coverage	_site_coverage	A number between 0 and 1 that represents the fraction of the city terrain that the building footprints occupy. It describes how close the buildings are to one another in the city.	Goo
facade_to_site	_facade_to_site	A number that represents the ratio of vertical urban surface area [walls] to the total terrain area of the city. This value can be greater than 1.	Goo
bldg_programs	_bldg_programs	A list of building programs that are within the urban area. These should come from the "DF Bldg Programs" component.	Goo
bldg_ages	_bldg_ages	A list of building ares that are within the urban area, which correspond with the _bldg_programs above. These should come from the "DF Bldg Age" component.	Goo
bldg_ratios	_bldg_ratios	A list of values between 0 and 1 that denote the fraction of the total floor area of the urban area occupied each of the _bldg_programs above. The connected values should sum to 1.	Goo
tree_coverage	tree_coverage_	An number from 0 to 1 that defines the fraction of the entire urban area (including both pavement and roofs) that is covered by trees. The default is set to 0.	Goo
grass_coverage	grass_coverage_	An number from 0 to 1 that defines the fraction of the entire urban area (including both pavement and roofs) that is covered by grass/vegetation. The default is set to 0.	Goo
--------------------	--------------------	...	Goo
climate_zone	_climate_zone	A text string representing the ASHRAE climate zone. (eg. 5A). This is used to set default constructions for the buildings in the city.	Goo
traffic_par	_traffic_par	Traffic parameters from the "DF Traffic Parameters" component. This input is required as anthropogenic heat from traffic can significantly affect urban climate and varies widely between commerical, residential, and industrial districts.	Goo
vegetation_par	vegetation_par_	An optional set of vegetation parameters from the "DF Vegetation Parameters" component. If no vegetation parameters are input here, the Dragonfly will use a vegetation albedo of 0.25 and Dragonfly will attempt to determine the months in which vegetation is active by looking at the average monthly temperatures in the EPW file.	Goo
pavement_par	pavement_par_	An optional set of pavement parameters from the "DF Pavement Parameters" component. If no paramters are plugged in here, it will be assumed that all pavement is asphalt.	Goo
--------------------	--------------------	Script variable City	Goo
run	_run	Set to 'True' to run the component and generate the Dragonfly city from the connected inputs.	Goo

Outputs

Name	ID	Description	Type
out	read_me	...	String
DF_city	DF_city	A Drafongfly city objectthat can be plugged into the "DF Run Urban Weather Generator" component.	Goo