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metaf(1) metaf2xml Documentation metaf(1)
 

metaf.pl - download and display METAR/TAF/SYNOP/BUOY/AMDAR messages

as a standalone script used from the command line:
 metaf.pl 'type_metaf=...&type_synop=...&type_buoy=...&type_amdar=...&lang=...&format=...&src_metaf=...&src_synop=...&src_buoy=...&src_amdar=...&mode=...&hours=...&msg_metaf=...&msg_synop=...&msg_buoy=...&msg_amdar=...'
or
 metaf.pl type_metaf=... type_synop=... type_buoy=... type_amdar=... lang=... format=... src_metaf=... src_synop=... src_buoy=... src_amdar=... mode=... hours=... msg_metaf='...' msg_synop='...' msg_buoy='...' msg_amdar='...'
or as a CGI script used by an HTML form (HTTP method GET):
 <form method="GET" action="metaf.pl">
  <input name="type_metaf" ... >
  <input name="type_synop" ... >
  <input name="type_buoy" ... >
  <input name="type_amdar" ... >
  <input name="lang" ... >
  <input name="format" ... >
  <input name="src_metaf" ... >
  <input name="src_synop" ... >
  <input name="src_buoy" ... >
  <input name="src_amdar" ... >
  <input name="mode" ... >
  <input name="hours" ... >
  <input name="msg_metaf" ... >
  <input name="msg_synop" ... >
  <input name="msg_buoy" ... >
  <input name="msg_amdar" ... >
 </form>

This script can download and display in plain language up-to-date or historical weather information (METAR, TAF, SYNOP, BUOY or AMDAR messages) from Internet servers, an SQL database, or a local file. It can be used from the command line, or with GET or POST requests if it is installed to be called via CGI by a web server.
If the script is called from a web server and the file $CGI_LOG_FILE is writable by the user running the web server (e.g. "wwwrun"), metaf.pl will log the requests there.

The Perl modules "CGI", "metaf2xml::parser" and "metaf2xml::src2raw" are required.
The Perl module "DBI" and the module "DBD" (for the configured type of data source) are required if an SQL database is used as the data source.
The program "curl" is required to download weather messages from Internet servers.
The program "xsltproc" is required if the script is to convert the XML to HMTL or text.

noaa
National Oceanic and Atmospheric Administration
nws
the National Weather Service department of the NOAA
iws
the Internet Weather Source of the NWS
adds
the Aviation Digital Data Service of the NWS
addsds
the experimental data server of the Aviation Digital Data Service of the NWS
cod
College of DuPage
fsu
Florida State University

-v
print version of metaf.pl and exit

The following variables can be set from CGI parameters or on the command line:
type_metaf
type of content in "msg_metaf":
metar
METAR/SPECI/SAO message (default)
taf
TAF message
icao
ICAO id(s)
If "msg_metaf" starts with "METAR", "SPECI" or "TAF", "type_metaf" is set to metar or taf, respectively.
If "msg_metaf" is not a list of ICAO id(s), "type_metaf" is set to metar.
If "type_metaf" is icao and one or more ICAO ids are given, messages for the specified airports are fetched from "src_metaf".
type_synop
type of content in "msg_synop":
synop
SYNOP message (default)
wmo
WMO SYNOP id(s)
nat
national id(s) STATION-COUNTRY
ship
SYNOP SHIP id(s)
mobil
SYNOP MOBIL id(s)
If "msg_synop" starts with "AAXX", "BBXX" or "OOXX" or is not a list of SYNOP ids, "type_synop" is set to synop.
If "type_synop" is wmo, ship, mobil or nat and one or more SYNOP ids are given, messages for the specified stations are fetched from "src_synop".
type_buoy
type of content in "msg_buoy":
buoy
BUOY message (default)
wmo
WMO buoy id(s)
If "msg_buoy" is not a list of WMO buoy ids, "type_buoy" is set to buoy.
If "type_buoy" is wmo and one or more WMO buoy ids are given, messages for the specified buoys are fetched from "src_buoy".
type_amdar
type of content in "msg_amdar":
amdar
AMDAR message (default)
ac
aircraft id(s)
If "msg_amdar" starts with "AMDAR" or is not a list of aircraft ids, "type_amdar" is set to amdar.
If "type_amdar" is ac and one or more aircraft ids are given, messages for the specified aircrafts are fetched from "src_amdar".
lang
language for output of script and display of parsed message: de (default), en, es, ru
If "lang" is not set the first allowed value of the HTTP header "Accept-Language" is used.
format
output format: html (default), text, xml (with style sheet reference)
src_metaf
source for METAR/TAF messages to be fetched: noaa (NOAA/IWS)[1] (default), adds[2], addsds[2], ogimet[2], nws[1], cod[1] (no TAF), fsu[1] (no TAF). It is ignored if a source in "DB_DATA_SOURCES"[3] could be opened or $CGI_DATA_DIR/metaf.txt[4] exists.
Note: cod and fsu are not available in the web-based interfaces.
src_synop
source for SYNOP messages to be fetched: nws[1] (default), ogimet[2], cod[1], fsu[1]. It is ignored if a source in "DB_DATA_SOURCES"[3] could be opened or $CGI_DATA_DIR /synop.txt[4] exists.
Note: fsu is not available in the web-based interfaces.
src_buoy
source for BUOY messages to be fetched: nws[1] (default), ogimet[2]. It is ignored if a source in "DB_DATA_SOURCES"[3] could be opened or $CGI_DATA_DIR /buoy.txt[4] exists.
src_amdar
source for AMDAR messages to be fetched: nws[1] (default), fsu[1]. It is ignored if a source in "DB_DATA_SOURCES"[3] could be opened or $CGI_DATA_DIR/amdar.txt[4] exists.
mode
which messages to show and how to show them:
summary
show all messages in selected time period, show one row per message (TAF: one row per forecast period, AMDAR: one row per observation)
any other value (or omitted)
show only latest messsage for each station in selected time period, show values in detail
hours
for mode summary: number of hours to fetch messages for (0..72, default: 24)
Note: The exact time range for which data can be fetched depends on the source of messages.
msg_metaf
METAR/TAF message to be processed, or ICAO id(s)
msg_synop
SYNOP message to be processed, or WMO id(s)
msg_buoy
BUOY message to be processed, or WMO id(s)
msg_amdar
AMDAR message to be processed, or aircraft id(s)
[1]: Files will be fetched from the server and searched. Note: The parameter hours is used to select files by their time stamp or name; the selected files do not necessarily contain only messages for the choosen hours.
[2]: the HTML form provided by the server will be used
[3]: For the description of the configuration variable $DB_DATA_SOURCES see the USAGE NOTES for "DB_DATA_SOURCES" below.
[4]: For the format required for the files in $CGI_DATA_DIR see the USAGE NOTES for "CGI_DATA_DIR" below.

The length of the body of the POST request (not the length of query string of the URL) is restricted to 600 bytes.
The following variables can be adapted to local needs; this is typically done during the installation:
METAF2XML_XSL
directory for the XSL style sheets
CGI_DATA_DIR
directory for files with pre-processed METAR/TAF/SYNOP/BUOY/AMDAR messages
The messages in these files must have the format specified by the WMO Manual No. 306, without modifications due to distribution like providing the initial part of messages only once for several messages or appending an "=" (equal sign) to terminate a message, with the data type "T1T2" prepended. This format can be obtained using:
 metafsrc2raw.pl -F<FORMAT> -H1 [FILE] ...
    
CGI_LOG_FILE
complete path for log file
CURL
path and options for "curl"
CURL_PROXY_OPTS
options for "curl" if an HTTP proxy should be used
DB_DATA_SOURCES
space delimited strings to describe possible data sources
If the string "sqlite" is in the list, the file $CGI_DATA_DIR /sqlite.db is used as database. For other strings, the file $CGI_DATA_DIR/"string" .db should contain the connect string ("DBI:"...) in the first line. The database username is "metaf2xml", it has no password; the user "metaf2xml" should have only SELECT rights.
The first data source which can be opened is used. If the last data source fails to open or "DB_DATA_SOURCES" is empty, the parameters "src_"* are used.
However, if a string ends in "/f", this is the last data source to try and the parameters "src_"* are not used, either. If this source fails to open, the script will exit with the HTTP error 503.
The Perl module "DBI" and the module "DBD" for the configured data source are required if a database is to be used.
If there are any CGI errors the type of error is reported and the script terminates.
The parameters "msg_"* are truncated to 3000 characters. Letters are converted to upper case. Any characters that are not allowed in a message are removed.

If an invalid option was provided, the script will exit with status 1, otherwise it will exit with status 0.

Parse a METAR message and print the result as HTML:
 metaf.pl msg_metaf="YUDO 090600Z 00000KT CAVOK 22/15 Q1021"
Fetch up-to-date METAR and TAF messages (from NOAA/IWS), SYNOP messages (from NOAA/NWS land) for Rio (SBGL, 83746), New York (KJFK, 74486), and Tokyo (RJTT, 47662) and BUOY messages from a buoy nearby (from NOAA/NWS) and print the result as XML:
 metaf.pl format=xml type_metaf=icao type_synop=wmo type_buoy=wmo msg_metaf="SBGL KJFK RJTT" msg_synop="83746 74486 47662" msg_buoy="31550 41997 53596"

metaf2xml::parser(3pm), metaf2xml::src2raw(3pm), metafsrc2raw(1), <http://metaf2xml.sourceforge.net/>

copyright (c) 2006-2017 metaf2xml @ <http://metaf2xml.sourceforge.net/>
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
2017-06-17 metaf2xml 2.2

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