That section of the doc is a text flowchart. I'll reformatted to make it a little more clear in the next version of the SDK. Below is the change.
Want to know Position?
- Use Roll Commands to move Sphero to a locator position - See "The Full Setup" in the doc
- Use the locator data to 'know' where Sphero is - See "The Default Setup" in the doc
Want to know distance travelled?
- Find Odometer distance - See "Distance Travelled"
- Distance 'as a crow flies' - See "Default Setup"