Posts Tagged ‘perl’
Image Geotagging
Geotagging is the process of adding geographical identification metadata to various media such as photographs, video, websites, or RSS feeds and is a form of geospatial metadata. These data usually consist of latitude and longitude coordinates, though they can also include altitude, bearing, accuracy data, and place names.[1]
Geotagging standards in electronic file formats:
- JPEG photos
- HTML pages: ICBM method, RDF feeds, Microformat, Wikipedia, Geotagging in tag-based systems & Geoblogging
the most famous API and Application on image geotagging is exiftool. [2]
Geotagging with ExifTool[3]
The ExifTool geotagging feature adds GPS tags to images based on data from a GPS track log file. The GPS track log file is loaded, and linear interpolation is used to determine the GPS position at the time of the image, then the following tags are written to the image:
- GPSLatitude
- GPSLatitudeRef
- GPSLongitude
- GPSLongitudeRef
- GPSAltitude
- GPSAltitudeRef
- GPSDateStamp
- GPSTimeStamp
Currently supported GPS track log file formats:
- GPX
- NMEA (RMC, GGA, GLL and GSA sentences)
- KML
- Garmin XML
- Magellan eXplorist PMGNTRK
Test Website:
Examples: [4]
- READING EXAMPLES
- WRITING EXAMPLES
- COPYING EXAMPLES
- RENAMING EXAMPLES
- GEOTAGGING EXAMPLES
- PIPING EXAMPLES
EXIF stands for “Exchangeable Image File Format”. This type of information is formatted according to the TIFF specification, and may be found in JPG, TIFF, PNG, MIFF and HDP images, as well as many TIFF-based RAW images, and even some AVI and MOV videos. [5]
Applications based on exiftool:
- http://geotag.sourceforge.net/?q=node/1
- http://www.carto.net/projects/photoTools/gpsPhoto/
- http://studio.messlinger.com/2009/03/08/exiftool-and-the-automator/
- others [6]
[1] http://en.wikipedia.org/wiki/Geotagging
[2] http://www.sno.phy.queensu.ca/~phil/exiftool/
[3] http://www.sno.phy.queensu.ca/~phil/exiftool/geotag.html
[3][oldlink] http://cpansearch.perl.org/src/EXIFTOOL/Image-ExifTool-7.82/html/geotag.html
[4] http://www.sno.phy.queensu.ca/~phil/exiftool/exiftool_pod.html
[5] http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html
[6] http://www.sno.phy.queensu.ca/~phil/exiftool/#links
logwatch error because of undefined timezone
yesterday I changed timezone on my server. And I got report about this error:
ERROR: Date::Manip unable to determine TimeZone.
Execute the following command in a shell prompt:
perldoc Date::Manip
The section titled TIMEZONES describes valid TimeZones
and where they can be defined.
you should read documentation of perl module Date::Manip to define your timezone.
This is what the list of timezone that I have got from ‘perldoc Date::Manip’.
TIME ZONES
The following time zone names are currently understood (and can be used in parsing dates). These are zones defined in RFC 822.
Universal: GMT, UT
US zones : EST, EDT, CST, CDT, MST, MDT, PST, PDT
Military : A to Z (except J)
Other : +HHMM or -HHMM
ISO 8601 : +HH:MM, +HH, -HH:MM, -HH
In addition, the following time zone abbreviations are also accepted. In a few cases, the same abbreviation is used for two different time zones
(for example, NST stands for Newfoundland Standard -0330 and North Sumatra +0630). In these cases, only 1 of the two is available. The one pre-
ceded by a "#" sign is NOT available but is documented here for completeness. This list of zones comes in part from the Time::Zone module by Gra-
ham Barr, David Muir Sharnoff, and Paul Foley (with several additions by myself).
IDLW -1200 International Date Line West
NT -1100 Nome
HST -1000 Hawaii Standard
CAT -1000 Central Alaska
AHST -1000 Alaska-Hawaii Standard
AKST -0900 Alaska Standard
YST -0900 Yukon Standard
HDT -0900 Hawaii Daylight
AKDT -0800 Alaska Daylight
YDT -0800 Yukon Daylight
PST -0800 Pacific Standard
PDT -0700 Pacific Daylight
MST -0700 Mountain Standard
MDT -0600 Mountain Daylight
CST -0600 Central Standard
CDT -0500 Central Daylight
EST -0500 Eastern Standard
ACT -0500 Brazil, Acre
PET -0500 Peruvian Time
VET -0430 Venezuela
SAT -0400 Chile
CLT -0400 Chile Standard
CLST -0400 Chile Standard
BOT -0400 Bolivia
EDT -0400 Eastern Daylight
AST -0400 Atlantic Standard
AMT -0400 Brazil, Amazon
ACST -0400 Brazil, Acre Daylight
#NST -0330 Newfoundland Standard nst=North Sumatra +0630
NFT -0330 Newfoundland
CLDT -0300 Chile Daylight
#GST -0300 Greenland Standard gst=Guam Standard +1000
#BST -0300 Brazil Standard bst=British Summer +0100
#BRST -0300 Brazil Standard
BRT -0300 Brazil Standard
AMST -0300 Brazil, Amazon Daylight
ADT -0300 Atlantic Daylight
ART -0300 Argentina
UYT -0300 Uruguay
NDT -0230 Newfoundland Daylight
ARST -0200 Argentina Daylight
AT -0200 Azores
BRST -0200 Brazil Daylight (official time)
FNT -0200 Brazil, Fernando de Noronha
UYST -0200 Uruguay
WAT -0100 West Africa
FNST -0100 Brazil, Fernando de Noronha Daylight
GMT +0000 Greenwich Mean
UT +0000 Universal (Coordinated)
UTC +0000 Universal (Coordinated)
WET +0000 Western European
CET +0100 Central European
FWT +0100 French Winter
MET +0100 Middle European
MEZ +0100 Middle European
MEWT +0100 Middle European Winter
SWT +0100 Swedish Winter
BST +0100 British Summer bst=Brazil standard -0300
GB +0100 GMT with daylight saving
WEST +0100 Western European Daylight
CEST +0200 Central European Summer
EET +0200 Eastern Europe, USSR Zone 1
FST +0200 French Summer
MEST +0200 Middle European Summer
MESZ +0200 Middle European Summer
METDST +0200 An alias for MEST used by HP-UX
SAST +0200 South African Standard
SST +0200 Swedish Summer sst=South Sumatra +0700
EEST +0300 Eastern Europe Summer
EETDST +0300 An alias for eest used by HP-UX
BT +0300 Baghdad, USSR Zone 2
MSK +0300 Moscow
EAT +0300 East Africa
IT +0330 Iran
ZP4 +0400 USSR Zone 3
MSD +0300 Moscow Daylight
ZP5 +0500 USSR Zone 4
YEKT +0500 Yeakaterinburg time zone, Russia
YEKST +0500 Yeakaterinburg summer time zone, Russia
IST +0530 Indian Standard
ZP6 +0600 USSR Zone 5
NOVT +0600 Novosibirsk winter time zone, Russia
OMST +0600 Omsk time zone, Russia
NST +0630 North Sumatra nst=Newfoundland Std -0330
#SST +0700 South Sumatra, USSR Zone 6 sst=Swedish Summer +0200
JAVT +0700 Java
NOVST +0700 Novosibirsk summer time zone, Russia
ICT +0700 Indo China Time
KRAT +0700 Krasnoyarsk, Russia
MYT +0800 Malaysia
CCT +0800 China Coast, USSR Zone 7
KRAST +0800 Krasnoyarsk, Russia Daylight
AWST +0800 Australian Western Standard
WST +0800 West Australian Standard
PHT +0800 Asia Manila
JST +0900 Japan Standard, USSR Zone 8
ROK +0900 Republic of Korea
ACST +0930 Australian Central Standard
CAST +0930 Central Australian Standard
AEST +1000 Australian Eastern Standard
EAST +1000 Eastern Australian Standard
GST +1000 Guam Standard, USSR Zone 9 gst=Greenland Std -0300
CHST +1000 Guam Standard, USSR Zone 9 gst=Greenland Std -0300
ACDT +1030 Australian Central Daylight
CADT +1030 Central Australian Daylight
AEDT +1100 Australian Eastern Daylight
EADT +1100 Eastern Australian Daylight
IDLE +1200 International Date Line East
NZST +1200 New Zealand Standard
NZT +1200 New Zealand
NZDT +1300 New Zealand Daylight
Others can be added in the future upon request.
Date::Manip must be able to determine the time zone the user is in. It does this by looking in the following places:
$Date::Manip::TZ (set with Date_Init or in Manip.pm)
$ENV{TZ}
the Unix `date` command (if available)
$main::TZ
/etc/TIMEZONE
/etc/timezone
At least one of these should contain a time zone in one of the supported forms. If none do by default, the TZ variable must be set with Date_Init.
The time zone may be in the STD#DST format (in which case both abbreviations must be in the table above) or any of the formats described above.
The STD#DST format is NOT available when parsing a date however. The following forms are also available and are treated similar to the STD#DST
forms:
US/Pacific
US/Mountain
US/Central
US/Eastern
Canada/Pacific
Canada/Mountain
Canada/Central
Canada/Eastern
I configure the timezone using command ‘dpkg-reconfigure tzdata’,
And my /etc/timezone consist of unknown format for perl module Date::Manip.
the content of /etc/timezone should change into one of the format above.
in this case, i use timezone JAVT. because I love Java 😉
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