concentric zone model
also known as the Burgess model is one of the earliest theoretical models to explain urban social structures. created in 1925, it is not commonly use in modern day
sector model
also known as the Hoyt model, is a model of urban land use proposed in 1939 by land economist Homer Hoyt.
multiple nuclei model
an economical model created by Chauncy Harris and Edward Ullman in the 1945
transportation infrastructure
the set of transportation facilities and systems that serve a country, city, or other area e.g. buses, trains, cars, ships, planes,…
healthcare infrastructure
the set of healthcare facilities and systems that serve a country, city, or other area e.g. hospitals, clinics, dentistries,…
water and sewage infrastructure
the set of water and sewage facilities and systems that serve a country, city or other area
electricity system
the set of electric facilities and systems that serve a country, city, or other area (doesn’t have “infrastructure” in the name)
communication infrastructure
the set of communication facilities and systems that serve a country, city, or other area
urban sustainability
when something can be used forever and it does not have a negative impact on urban life