Uploading Geotagged Pictures to Google Earth
The pictures displayed within Google Earth do not come from within Google Earth itself. Rather, they are overlays of different information services that may be viewed within the context of Google Earth. The only imagery in Google Earth is the actual images of Earth.
When most people talk about uploading photos into Google Earth, what they mean is uploading pictures to Panoramio. Panoramio is a Google owned service where users share photographs that are linked to specific locations. Uploading geotagged photos to Panoramio shares them online with all users of the service. Additionally, there is a built-in layer in Google Earth that allows one to view the photos from Panaramio within Google Earth. This is how you can upload your own pictures and see them in Google Earth.
You can manually upload photos to Panoramio, or you can upload them from within your Google Picasa account.
In order to upload photos to Google Earth via Panoramio from Picasa, the picture must be both tagged with a location, and in a publicly accessible album. To upload your geotagged photo just click the "Upload to Panoramio" link beneath the map when viewing your picture. If you have not linked your Panoramio account -- or you do not have one -- you will be prompted to login again and choose a username for Panoramio. Then, your photo will be uploaded.
Photos uploaded are reviewed before being published to Google Earth, so your picture will not appear right away. Once your picture has been approved and Google Earth has been updated you can check out your geotagged picture in Google Earth.
To view your geotagged photo that you uploaded in Google Earth, start the Google Earth application. Zoom in to the location of your photograph and you will find the digital photograph that you uploaded into Google Earth.