This is an example of a very slick webGL application for building 3d Earth visualizations -
Doarama™ is a 3D visualization engine for geolocated activities. The service allows you to upload GPS track logs (from a smartphone
or sports GPS tracker) of activities you have participated in. These tracks are then visualized on a 3D map directly
within a web browser using familiar controls and intuitive navigation.
This is built using Cesium. Cesium is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.
It uses WebGL for hardware-accelerated graphics, and is cross-platform, cross-browser, and tuned for
dynamic-data visualization. Cesium is open source under the Apache 2.0 license. It is free for
commercial and non-commercial use.
Here we have a GPX track from sailing on the Saline Solution.