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Contents
# frozen_string_literal: true
module USGeo
# This module is mixed into all models. Note that the area given for land and water
# is in square miles.
module Area
SQUARE_MILES_TO_KILOMETERS = 2.59
private_constant :SQUARE_MILES_TO_KILOMETERS
# @!attribute land_area
# @return [Float, nil] Land area in square miles.
# @!attribute water_area
# @return [Integer, nil] Water area in square miles.
# Total area of both land an water in square miles.
#
# @return [Float, nil]
def total_area
land_area.to_f + water_area.to_f if land_area
end
# The fraction of the area that is composed of land instead of water.
#
# @return [Float, nil]
def percent_land
land_area / total_area if land_area
end
# Land area in square kilometers.
#
# @return [Float, nil]
def land_area_km
land_area * SQUARE_MILES_TO_KILOMETERS if land_area
end
# Water area in square kilometers.
#
# @return [Float, nil]
def water_area_km
water_area * SQUARE_MILES_TO_KILOMETERS if water_area
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems