Google+Earth+for+iPods

http://www.google.com/support/mobile/bin/answer.py?hl=en&answer=112747

Google Earth User Guide for the iPhone and iPod Touch
//This user guide describes Google Earth for the iPhone and the iPod touch.// Welcome to Google Earth, on the go! With this application, your iPhone or iPod touch becomes a window to anywhere, allowing you to view the entire planet in detail. You can also display additional content. In this document, the term 'iPhone' refers to the iPhone or iPod touch.

System Requirements
To use Google Earth, you must have: **Note** - If you are using an iPhone (3G version), Google Earth works best with a WiFi connection, as opposed to a 3G or standard data connection.
 * At least 211 MB of free space
 * A WiFi connection if you are using an iPhone (Wifi only version).

Navigating
You can navigate through this 3D view of the globe in several ways: The compass shows your current heading. || Google Earth follows your location until you navigate or touch the location icon again. || Note that the accuracy of the location shown depends the following: You can personalize how your latitude and longitude coordinates are displayed by choosing**Position** from the **Options** menu. To have the coordinates appear at the bottom of the main view, ensure that the **Position** option is toggled on.
 * **Pan** || Place one finger on the screen and drag it in the appropriate direction. You can also throw the view by flicking the screen quickly. ||
 * **Zoom in** || Place two fingers on the screen simultaneously and move them apart OR double tap the screen with one finger. ||
 * **Zoom out** || Place two fingers on the screen simultaneously and move them together (pinch) OR double tap the screen with two fingers simultaneously. ||
 * **Rotate** || Place two fingers on the screen and turn in the appropriate direction. ||
 * **Look around** || Place two fingers together on the screen simultaneously and move them in any direction. ||
 * **Tilt** || Place two fingers together on the screen simultaneously and move them down. You can also tilt automatically . ||
 * **Reset to north-up view** || [[image:http://www.google.com/help/hc/images/mobile_compass_en.gif width="37" height="37" caption="Compass icon"]]
 * **Go to your location** || [[image:http://www.google.com/help/hc/images/mobile_location_en.gif width="37" height="37" caption="Location icon"]]
 * **Your specific device** - Any iPhone may be able to determine your location from your Internet connection. Any 3G enabled iPhone may determine your location using nearby cell towers. Likewise, any 3G mobile device can use global positioning system (GPS) to determine your location.
 * **Quality of available (GPS) signals** - For the iPhone 3G, better signals result in more accurate locations.
 * **Display your coordinates and altitude** || [[image:http://www.google.com/help/hc/images/mobile_options_en.gif width="37" height="37" align="baseline"]]

If you'd like to customize how the latitude and longitude coordinates show, touch the desired format from the three options.

You may also toggle between feet and meters when displaying altitude. ||

Tilting Your View
When you first start Google Earth for your iPhone, the default view of the earth is straight down. You can tilt the view in order to see a different perspective of the area you are exploring. You can tilt to a maximum of 120 degrees, which provides a view that may include the horizon.

To move the horizon down, touch the screen simultaneously with two fingers, one right beside the other, and move them down. To put the horizon back up, touch the screen simultaneously with two fingers, one right beside the other, and move them up.

When **Autotilt** is enabled, as you tilt the mobile device from looking at it straight down, to looking at it vertically, your angle of view of the Earth tilts to match.

You can turn **Autotilt** off or on from within the **Options** window. ||
 * **Turn Autotilt on/off** || [[image:http://www.google.com/help/hc/images/mobile_options_en.gif width="37" height="37" align="baseline" caption="Options icon"]]

Searching for Places or Businesses

 * **Search** || [[image:http://www.google.com/help/hc/images/mobile_search_en.gif]]

If your search returns multiple results, touch the appropriate result to fly to this location, or see a list of results by touching the list icon at the right-corner of the **search box**.

Currently, street-level searching is limited to certain countries. Learn more. || Touch **Clear History** ( see below ). ||
 * **Clear search results** || [[image:http://www.google.com/help/hc/images/mobile_options_en.gif width="37" height="37"]]
 * Tip** - If you are flying somewhere after you touch a search result, touching the screen stops the motion.

Displaying Content
You can display interesting geographic content within your viewing area. This includes Places of interest of interest (Places), Businesses, Panoramio photos, Wikipedia, Borders and Labels, and Terrain. Under **Options**, you can enable or disable the shown content layers, by toggling between the circle and the arrow. || Under **Options**, you can also access [|My Maps] content that you've created or login to your My Maps account.' || Once you have enabled your desired content, some content will display as icons in the main view. Touch any icon to display more information. Once you have enabled this content, you can touch on icons in the main view to display more information. You may need to zoom in to see additional Places icons for an area. Once you enable terrain, you can view hilly or mountainous terrain in 3D.
 * **Display content** || [[image:http://www.google.com/help/hc/images/mobile_options_en.gif]]

Cache and Search History

 * **Clear Cache and Search History** || [[image:http://www.google.com/help/hc/images/mobile_options_en.gif width="37" height="37" caption="Options icon"]]

Google Earth stores imagery and data you have viewed so that it can quickly display this information the next time you navigate to these areas. This stored information is called the //cache//.

You can recover some memory space by clearing the cache, although this will slow the rate at which Google Earth will show imagery from locations that had previously been stored until it downloads this information again.

To clear your cache, touch **Clear Cache** in the **Options** window. A confirmation dialog box appears. Touch Clear Cache.

You can also clear the history of your searches. This prevents previous searches from appearing as suggestions in the search box and clears current search results.

To clear your search history, touch **Search History** from within the **Options** window. A confirmation dialog box appears. Touch Clear History. ||