adding IFD GPS

hi,

i am new to this list and rather new to PHP too so i am a
little bit 
lost in the techie docs...

i found edit-description.php in the examples folder and work
with that 
one in order to get/add EXIF GPS information. getting and
setting of 
already existing GPS info works fine so far with

$gps = $ifd0->getSubIfd(PelIfd::GPS);
$lat = $gps->getEntry(PelTag::GPS_LATITUDE);
$lat->setValue(array(47,1),array(48,1),array(1234,100));

(btw. it took long for me to figure out that the three
arrays are not 
written as a 2-dimensional array whereas it is stored as
such). anyway, 
the problem i have is with the rather classical case of no
GPS section, 
having $ifd0->getSubIfd(PelIfd::GPS) == null. i was
hoping to create one 
with

$gps = new PelIfd();
$ifd0->addSubIfd($gps);
$lat = new PelEntryRational(PelTag::GPS_LATITUDE, 
array(11,1),array(22,1),array(33,1));
$gps->addEntry($lat);

but that doesn't work. what command am i missing here?

thank you for a helping hand and thanks for the API too!

andré


-- 
____________________________________________________________
_______
andre m. winter,
cartography for internet and multimedia applications
a6091 goetzens, tyrol, austria
tel.: ++43.5234.32732
email: <wintercarto.net>

<http://www.vectoreal.co
m/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/>
    print and online touristic map solutions


-- 
____________________________________________________________
_______
andre m. winter,
 cartography for internet and multimedia applications
 a6091 goetzens, tyrol, austria
 tel.: ++43.5234.32732
 email: <wintercarto.net>

<http://www.vectoreal.co
m/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/>
    print and online touristic map solutions



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okay,

answering my own question,the problem was the missing
PelIfd::GPS while 
creating the GPS IFD:


$gps = new PelIfd(PelIfd::GPS);
$ifd0->addSubIfd($gps);
$lat = new PelEntryRational(PelTag::GPS_LATITUDE, 
array(11,1),array(22,1),array(33,1));
$gps->addEntry($lat);


andré



André M. Winter - Carto.net a écrit :

> hi,
>
> i am new to this list and rather new to PHP too so i am
a little bit 
> lost in the techie docs...
>
> i found edit-description.php in the examples folder and
work with that 
> one in order to get/add EXIF GPS information. getting
and setting of 
> already existing GPS info works fine so far with
>
> $gps = $ifd0->getSubIfd(PelIfd::GPS);
> $lat = $gps->getEntry(PelTag::GPS_LATITUDE);
>
$lat->setValue(array(47,1),array(48,1),array(1234,100));
>
> (btw. it took long for me to figure out that the three
arrays are not 
> written as a 2-dimensional array whereas it is stored
as such). 
> anyway, the problem i have is with the rather classical
case of no GPS 
> section, having $ifd0->getSubIfd(PelIfd::GPS) ==
null. i was hoping to 
> create one with
>
> $gps = new PelIfd();
> $ifd0->addSubIfd($gps);
> $lat = new PelEntryRational(PelTag::GPS_LATITUDE, 
> array(11,1),array(22,1),array(33,1));
> $gps->addEntry($lat);
>
> but that doesn't work. what command am i missing here?
>
> thank you for a helping hand and thanks for the API
too!
>
> andré
>
>


-- 
____________________________________________________________
_______
andre m. winter,
 cartography for internet and multimedia applications
 a6091 goetzens, tyrol, austria
 tel.: ++43.5234.32732
 email: <wintercarto.net>

<http://www.vectoreal.co
m/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/>
    print and online touristic map solutions



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hi,

this is only a PEL related question.

i am editing exif data from uploaded images and i am
generating 
thumbnails and other sizes form that same images with
functions relying 
on imagecopyresampled(). the pity with that is that it
ignores *all* 
header info (see 
<http://www.geotrace.net/pix/a666/06_bremga
rten_railway_bridge.jpeg>) 
for an example). i know i could use PEL to tag all those
images again, 
but aren't there PHP-bases functions that include image
headers on 
resize/resample?

thanks,
andré

-- 
____________________________________________________________
_______
andre m. winter,
  cartography for internet and multimedia applications
  schiessstand 4/1, a6091 goetzens, tyrol, austria
  tel.: ++43.5234.32732
  email: <wintercarto.net>

<http://www.vectoreal.co
m/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/>
    print and online touristic map solutions 




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hi,

i am wondering why PEL makes use of unix time stamps (only?)
for time 
related exif fields. using classical conversion methods
limits 
(depending on the OS) input to a specific year range (eg.
1970-2036) 
whereas pure ascii (yyyy.mm-dd hh:mm:ss) would allow a
broader range. 
(btw the specific fields in the exif spec are ascii, 20
chars). is there 
a way to do

new PelEntryAscii(PelTag:ATE_TIME
_ORIGINAL,$myDateTimeOriginal);

?

andré


-- 
____________________________________________________________
_______
andre m. winter,
  cartography for internet and multimedia applications
  schiessstand 4/1, a6091 goetzens, tyrol, austria
  tel.: ++43.5234.32732
  email: <wintercarto.net>

<http://www.vectoreal.co
m/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/>
    print and online touristic map solutions 




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