NAME

ghcn_station_counts.pl - Count stations in ghcn_fetch.pl output

VERSION

version v0.22.258

SYNOPSIS

ghcn_station_counts.pl [-input] [-output] [-debug] [-verbose] [ file... ]

ghcn_station_counts.pl [--help | -? | --usage]

DESCRIPTION

The purpose of this script is to read a station list produced by "ghcn_fetch.pl" and to turn that list into a set of active station counts for each year. No report option should be given, so it generates a list of stations rather than weather data.

The input data must be tab-separated and contain the Station ID, the country, the state/province, and the active range (e.g. 1900-1927). All trailing columns of data are ignored.

In typical use, you would extract the stations of interest with:

ghcn_fetch -report "" <other_options>

and then either pipe it to ghcn_station_counts or save the output to a file and then use that file as input to ghcn_station_counts.

The output is a tab-separated three-column list consisting of the year, decade, and the count of active stations found in that year. This is suitable for importing into Excel and turning into a bar chart using PivotTable. You can chart by year or decade, using the average, maximum or minimum of the station count.

PARAMETERS

Getoptions::Long is used, so either - or -- may be used. Parameter names may be abbreviated, so long as they remains unambiguous. Flag options may appear after filenames.

-outclip

Send output to the Windows clipboard.

-debug

Enables debug() statements.

-h | -help

Display this documentation.

AUTHOR

Gary Puckering (jgpuckering@rogers.com)

LICENSE AND COPYRIGHT

Copyright 2022, Gary Puckering