knmi

require 'knmi'

station = KNMI.station_by_id(235)
parameters = KNMI.parameters(period = "daily", params = nil, categories = ["TEMP", "WIND"])
starts = Time.utc(2010, 6, 28) # 2010 June 28th
ends = Time.utc(2010, 6, 29) # 2010 June 29th
request = KNMI.get_data(station, parameters, starts, ends)
data = KNMI.convert(parameters, request)

require 'knmi'

# Get station object by station ID
station = KNMI.station_by_id(235)

station
#=> #<KNMI::Station:0x0000010133c938> # A struct object

# Available Instance Variables
station.instance_variables
#=> [:@id, :@name, :@elevation, :@photo, :@map, :@web, :@instrumentation, :@coordinates]
station.id
#=> 235
station.name
#=>"De kooy"
station.coordinates
#=> 52.924,4.785


# Get parameter object at the time interval you wish to use "hourly" or "daily"
# Params can be a single term or an array of terms such as "TG" or ["TG", TX]
# Categories can be a single term or an array of terms such as "WIND" or ["WIND", "TEMP"]
parameters = KNMI.parameters(period = "daily", params = nil, categories = ["TEMP", "WIND"])

parameters # returns an array of parameter objects
#=> [#<KNMI::Parameters:0x000001011387e0 @parameter="TX", @category="TEMP", @description="Maximum Temperature", @validate="n.integer?", @conversion="n / 10", @units="C", @period="daily">]

# Available Instance Variables
parameters[0].instance_variables
#=>[:@parameter, :@category, :@description, :@validate, :@conversion, :@units, :@period]

parameters[0].parameter
#=> "TX"


# Define Time period of interest
starts = Time.utc(2010, 6, 28) 	# 2010 June 28th
ends = Time.utc(2010, 7, 01) 		# 2010 June 29th

# Get Data using previously retrieved objects
request = KNMI.get_data(station, parameters, starts, ends)

# Available Instance Variables
request.instance_variables
#=> [:@query, :@data]

request.query
#=>["stns=235", "vars=TX", "start=20100628", "end=20100629"]

request.data
#=>[{:STN=>"235", :YYYYMMDD=>"20100628", :TX=>"263"}, {:STN=>"235", :YYYYMMDD=>"20100629", :TX=>"225"}]

request.data[0]
#=>{:STN=>"235", :YYYYMMDD=>"20100628", :TX=>"263"}


# Convert data from storage format to operating format
data = KNMI.convert(parameters, request)