Module: USGeo::Demographics

Included in:
CombinedStatisticalArea, CoreBasedStatisticalArea, County, CountySubdivision, MetropolitanDivision, Place, UrbanArea, UrbanAreaCounty, Zcta, ZctaCounty, ZctaPlace, ZctaUrbanArea
Defined in:
lib/us_geo/demographics.rb

Overview

This module is mixed into all models. Note that the area given for land and water is in square miles.

Instance Method Summary collapse

Instance Method Details

#percent_land ⇒ Object

The fraction of the area that is composed of land instead of water.



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# File 'lib/us_geo/demographics.rb', line 20

def percent_land
  land_area / total_area if land_area
end

#population_density ⇒ Object

Population per square mile.



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# File 'lib/us_geo/demographics.rb', line 10

def population_density
  population.to_f / land_area if population && land_area
end

#total_area ⇒ Object

Total area of both land an water in square miles



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# File 'lib/us_geo/demographics.rb', line 15

def total_area
  land_area.to_f + water_area.to_f if land_area
end