The festival of
Lights – Deepavali is just two days away.
It rained heavily in Chennai and in many parts of Tamil Nadu – it is a
depression, a surge in the current wet spell in southern states. IMD Press release reads : Depression over Bay
of Bengal and Extremely Severe Cyclonic storm ‘Megh’ over Arabian Sea.
A depression has formed over southwest Bay
of Bengal and lay centred at 0830 hours IST of today, the 8th November, 2015
near latitude 10.7° N and longitude 83.7° E, about 460 km southeast of Chennai,
it would move westnorthwestwards, intensify into a Deep Depression during next
24 hours and subsequently into a Cyclonic Storm. It would cross Tamil Nadu
coast between Karaikal and Chennai close to Puducherry around 9th midnight.
This morning driving on Beach Road [whilst waiting at
couple of signals] – I took some photos from my mobile Camera and upon reaching
home, uploaded on Facebook. It queries
whether I would like to add location to the photos it – I was stumped to notice
that for each photo, it was suggesting the exact location to be tagged – it read –
Mandaiveli, Marina and then Triplicane. Wondered
how it is possible. It is known as ‘Geo-tagging’.
It is all from EXIF
data. Depending on the camera, EXIF data
will store the current state of the camera when the photo was taken including
date and time, shutter speeds, focal lengths, flash, lens type, location data,
etc. Modern smartphone embed GPS
coordinates in each photo they take. Yes, those photos you’re taking have
location data embedded in them — at least by default. Many modern digital
cameras also do this. Geotagging basically
means that the longitude and latitude of the photo has been stored in the photo
metadata. The metadata is the invisible part of the photo called EXIF data.
Exchangeable image
file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) is a
standard that specifies the formats for images, sound, and ancillary tags used
by digital cameras (including smartphones), scanners and other systems handling
image and sound files recorded by digital cameras. This standard consists of
the Exif image file specification and the Exif audio file specification.
The Japan Electronic
Industries Development Association (JEIDA) produced the initial definition of
Exif. Version 2.1 of the specification is dated 12 June 1998. The latest,
version 2.3, released on 26 April 2010 and revised in May 2013, was jointly
formulated by JEITA and CIPA. Exif is supported by almost all camera
manufacturers.
The photos were taken
on Nokia Lumia 730 which runs on Windows
Phone operating system. The Lumia name
is derived from the partitive plural form of the word 'lumi', which means
'snow' in the Finnish language, and Estonian as well.
Technology often is amazing
!
With regards – S.
Sampathkumar
8th Nov.
2015
No comments:
Post a Comment