在启用地理标记功能的iPhone上拍摄的EFIX/JPEG照片中存储了哪些信息？

Question

我知道其中一些数据可以在iPhoto中查看,例如纬度,经度和海拔高度,但是有多少可用吗？更具体地说,我也希望得到图像的方向,这是EXIF格式的一部分.或者是否需要启用除地理标记之外的其他内容(与指南针有关)？

Answer 1

我建议安装命令行工具exif.您可以通过port install exif以root身份执行来通过Mac Ports获取它.

以下是我在iPod Touch上拍摄的照片中存储的exif信息示例:

bash:$ exif Oct\ 9\,\ 2010/IMG_0038.JPG 
EXIF tags in 'Oct 9, 2010/IMG_0018.JPG' ('Motorola' byte order):
--------------------+----------------------------------------------------------
Tag                 |Value
--------------------+----------------------------------------------------------
Manufacturer        |Apple
Model               |iPod touch
Orientation         |right - top
x-Resolution        |72.00
y-Resolution        |72.00
Resolution Unit     |Inch
Software            |4.1
Date and Time       |2010:10:06 17:43:43
YCbCr Positioning   |centered
Compression         |JPEG compression
x-Resolution        |72.00
y-Resolution        |72.00
Resolution Unit     |Inch
Exposure Time       |1/120 sec.
FNumber             |f/2.4
Exposure Program    |Normal program
ISO Speed Ratings   |320
Exif Version        |Exif Version 2.21
Date and Time (origi|2010:10:06 17:43:43
Date and Time (digit|2010:10:06 17:43:43
Components Configura|Y Cb Cr -
Shutter speed       |6.91 EV (1/120 sec.)
Aperture            |2.53 EV (f/2.4)
Metering Mode       |Average
Flash               |No flash function
Focal Length        |3.9 mm
FlashPixVersion     |FlashPix Version 1.0
Color Space         |sRGB
PixelXDimension     |640
PixelYDimension     |480
Sensing Method      |One-chip color area sensor
Exposure Mode       |Auto exposure
White Balance       |Auto white balance
Scene Capture Type  |Standard
Sharpness           |Normal
North or South Latit|N
Latitude            |44.00, 22.12, 0.00
East or West Longitu|W
Longitude           |56.00, 23.98, 0.00
GPS time (atomic clo|17:43:41.60
--------------------+----------------------------------------------------------
EXIF data contains a thumbnail (10215 bytes).

我不认为iPod Touch具有与iPhone相同的功能.

看起来iPhone也会有数据'GPSImg Direction',这听起来像你想要的.我不认为你必须做任何特别的事情来启用它,因为我没有通过搜索找到很多信息.