Class: USGeo::UrbanArea

Inherits:
BaseRecord
  • Object
show all
Includes:
Demographics
Defined in:
lib/us_geo/urban_area.rb

Overview

Urban areas are split into either urbanized areas (population > 50,000) or urban cluster (population < 50,000).

Direct Known Subclasses

UrbanCluster, UrbanizedArea

Constant Summary

Constants inherited from BaseRecord

BaseRecord::STATUS_IMPORTED, BaseRecord::STATUS_MANUAL, BaseRecord::STATUS_REMOVED

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Demographics

#percent_land, #population_density, #total_area

Methods inherited from BaseRecord

#imported?, #manual?, #removed?

Class Method Details

.load!(uri = nil) ⇒ Object 



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/us_geo/urban_area.rb', line 36

def load!(uri = nil)
  location = data_uri(uri || "urban_areas.csv")
 
  import! do
    load_data_file(location) do |row|
      load_record!(geoid: row["GEOID"]) do |record|
        record.type = (row["Population"].to_i >= 50_000 ? "UrbanizedArea" : "UrbanCluster")
        record.name = row["Name"]
        record.primary_county_geoid = row["Primary County"]
        record.population = row["Population"]
        record.housing_units = row["Housing Units"]
        record.land_area = area_meters_to_miles(row["Land Area"])
        record.water_area = area_meters_to_miles(row["Water Area"])
        record.lat = row["Latitude"]
        record.lng = row["Longitude"]
      end
    end
  end
end

Instance Method Details

#cluster? ⇒ Boolean

Returns:

  • (Boolean)

Raises:

  • (NotImplementedError) 


61
62
63
 
# File 'lib/us_geo/urban_area.rb', line 61

def cluster?
  raise NotImplementedError
end

#urbanized? ⇒ Boolean

Returns:

  • (Boolean)

Raises:

  • (NotImplementedError) 


57
58
59
 
# File 'lib/us_geo/urban_area.rb', line 57

def urbanized?
  raise NotImplementedError
end