Geocoding Images
Geocoding Images is the process by which a photo is associated with a geographical location. A geocoded image can be associated to geographical coordinates such as latitude and longitude or a physical address.
Methods of Geocoding Images:
- Using a location aware device such a GPS receiver – This is the most precise method of geocoding an image. When a photo is taken the location of the camera is recorded within the image. For example, JPEG and TIFF image file formats can store the geographical coordinates in the EXIF header. Although most digital cameras sold today do not contain a built in GPS receiver, an external GPS device can be used to keep track of the camera location and the data can be synchronized later using specialized software.
- Manualy inputting the location – If the user knows the coordinates, the location can be manually added using software.
- Providing geographical names such as city, zip code or a street address – A less prescice methos is adding descriptive data of the location to an image.
External Links
- WWMX – World Wide Media Exchange – a centralized index of geocoded digital photos
- Mappr – A site which plots images which contain geographical descriptive data such as city names, or zipcodes.
- Traditions of the Sun - A site which uses geocoded images
External References: