Generate a kml heatmap from a csv input

make_heatmap2.rb

#!/usr/bin/ruby
require 'csv'

HEADER = '<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
    <Document>
        <name>Puzzled Pint Heat Map</name>
'
FOOTER = '    </Document>
</kml>'

out = File.new('pdx2.kml', 'w')
out << HEADER
CSV.foreach("pdx.csv") do |row|
    name = row[0]
    addr = row[1]
    lat = row[2]
    long = row[3]
    value = 400 * row[4].to_i / 90
    zvalue = 50 * 90 / row[4].to_i
    out << "        <Placemark>
            <visibility>1</visibility>
            <name>#{name}</name>
            <address>#{addr}</address>
            <Point>
                <coordinates>#{long},#{lat},0</coordinates>
            </Point>
            <Model>
              <altitudeMode>relativeToGround</altitudeMode>
              <Location><longitude>#{long}</longitude><latitude>#{lat}</latitude><altitude>0</altitude></Location>
               <Scale><x>#{value}</x><y>#{value}</y><z>#{zvalue}</z></Scale>
              <Link><href>scaleIcon.dae</href></Link>
            </Model>        
        </Placemark>"
end
out << FOOTER
out.close