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78 lines
3.0 KiB
78 lines
3.0 KiB
4 years ago
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January 2021
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====================
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Stations are retrieved from https://tgftp.nws.noaa.gov/data/nsd_cccc.txt
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wget -O data/nsd_cccc.txt https://tgftp.nws.noaa.gov/data/nsd_cccc.txt
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dos2unix data/nsd_cccc.txt
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data/station_names.txt is used to provide correct orthography of the area
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where the station is located, which is used in the configuration dialog
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of kweather applet.
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The format of station_names.txt is ICAO;status;region_state;name;INFO1;INFO2
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If status is one of none|false|na|decomissioned the station is ignored.
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INFO1 is what was previously the 5th position in weather_stations.desktop
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makred with ------
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INFO2 is what was previously the 6th position in weather_stations.desktop
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makred with ---
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The source nsd_cccc.txt has illed information and structure that needs to be
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corrected in the files used in kweather. Some of the problems are:
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1. decomissioned stations
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2. names of station locations
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The genstations.pl is based on following idea
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Based on the input nsd_cccc.txt and the station_names.txt file we can
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generate stations.dat like following:
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for each station in nsd_cccc.txt do
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check if station ID matches one in station_names.txt
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if it matches then
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use the name of the station
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else
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use the name from nsd_cccc.txt
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write entry/line in stations.dat
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Based on stations.dat and weather_stations.desktop.in we can generate
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weather_stations.desktop.
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weather_stations.desktop will be updated with the names from stations.dat
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and the additional information will be preserved like following.
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for each station in stations.dat
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for each region from weather_stations.desktop.in
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if state is provided in stations.dat
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use the state to build a key with region and state
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else
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for each state in the states of the region
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use the state to build a key
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if section for this key exists
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and
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if name of the section matches
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stop processing
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proper section was found
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we add the station here
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write entry for the station
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There are few problems with this approach and the ill provided nsd_cccc.txt data
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1. States are missing and thus correlation between station and state can not be done
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2. When State is missing, based on the country/state name some entries are ambig
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Example Georgia and US state of Georgia
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Country list seemed to be used for the country names and as convention here
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wget ftp://ftp.ncdc.noaa.gov/pub/data/noaa/country-list.txt but the FIPS notation was
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dropped in 2008 as a standard, however continiues to be used.
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"The Census Bureau decided that, based on decades of using the terminology FIPS to
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describe its codes, it would continue to use the FIPS name for its updated codes,
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where FIPS now stood for FIP "Series", since there no longer existed an official
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FIP "Standard". [https://en.wikipedia.org/wiki/FIPS_county_code]
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A mapping to ISO 3166 ALPHA-2 https://laendercode.net/en/2-letter-list.html
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seems more appropriate.
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TODO: check the country code mapping in weather_stations.desktop.in
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