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Overlay
❍ Opening and Viewing
Overlays
■ Opening Overlays
Emailed to You
■ Opening Overlays on a
Web Server
■ Posting Image Overlays
to a Web Server
❍ Placing Google SketchUp
3D Models
● Importing Your Data
Into Google Earth
● Using Style Templates
● Using GPS Devices with
Google Earth
● Making Movies with
Google Earth
● Keyboard Controls
● 3D Viewer Options
panel. To permanently delete an image overlay, right-click on it in the Places
panel and choose Delete.
Learn more about using places and folders.
Overlay Requirements
Overlay images can be taken from your computer, from your network, or from a
web site. The image format must be:
● JPG
● BMP
● GIF
● TIFF
● TGA
● PNG
Overlays in PNG and GIF formats can be modified so that undesirable regions
(such as image boundaries) are transparent, letting the underlying imagery show
through.
You can use topographical maps, weather satellite image maps, or other
geographical image data as overlays. For ideas and examples of overlays, see
the Google Earth Community bulletin board (
bbs.keyhole.com).
The overlay image itself must have a North-Top orientation with simple cylindrical
projection. Simple cylindrical projection (or Plate Carrée) is a simple map
projection where the meridians and parallels are equidistant, straight parallel
lines, with the two sets crossing at right angles. (This format is also known as Lat/
Lon WGS84 projection.) Because a certain amount of modifications to overlay
images is allowed, you might find that the more common UTM maps work well
enough over small areas. However, for a more precise overlay of a large region,
simple cylindrical projection is required.
Note - The overlay feature is memory intensive. Consequently, images larger
than 2000x2000 pixels can reduce the performance of Google Earth and other
applications currently running on your computer. (To determine the size in
pixels of an image, display the image file in a Windows Explorer window, right-
click (CTRL click on the Mac) on it, and select Properties from the pop-up
menu.) If you are having trouble importing a large image, you can reduce its
size using image editing software such as Adobe Photoshop.
Overlay Features
Once you create an overlay, it has many of the same features available to it as a
simple placemark. With overlays, you can:
● Email them to other people - You can email image overlays just as you
would mail other placemark data. However, keep in mind that overlay files
can only be opened by other users of Google Earth. If you want to send
the overlay image as it appears on the earth to someone who doesn't have
- Google Earth User Guide 1
- New Features in Version 4.1 3
- Installing Google Earth 3
- System Requirements 3
- Changing Languages 4
- Additional Support 5
- Selecting a Server 5
- Navigating in Google Earth 6
- Using the Navigation Controls 8
- Top down view 9
- Tilted view 9
- Setting the Start Location 10
- About Search Terms 19
- Searching for Listings 20
- Touring and Saving Directions 21
- Saving Directions 22
- Sightseeing 23
- ● Click in the toolbar 24
- Saving a Point of Interest 27
- Sharing a Placemark 28
- Saving Search Results 28
- Saving Images 29
- Printing 29
- Viewing Layer Sub-Categories 32
- Tuning Display of POIs 33
- Viewing 3D Buildings 37
- Saving Places Data 42
- Opening Saved Placemarks 42
- Deleting Places Data 43
- Troubleshooting Email Issues 48
- Sharing Data Over a Network 48
- Saving Data to a Server 49
- About Network Links 50
- Creating a Network Link 50
- Setting Touring Behavior 53
- Number of Loops 54
- Setting the View 57
- Top-down, north up view 58
- Tilted and rotated view 58
- Changing Labels 59
- Using Custom Icons 60
- Setting Line Color and Width 60
- Setting Altitude 61
- Modifying Folder Settings 61
- Tips for Recording Movies 64
- ● Using the Overview Map 65
- ● 3D Viewer Options 65
- ● Viewing a Timeline 65
- Steps for Recording Movies 66
- When You Are Finished 67
- Viewing Many Results 70
- ● Using Style Templates 72
- ● Using GPS Devices with 72
- ● Making Movies with 72
- ● Keyboard Controls 72
- Available Units of Measure 73
- Overlay Requirements 78
- Overlay Features 78
- Terrain Integration 79
- Creating an Image Overlay 81
- Opening and Viewing Overlays 84
- Placing WMS Image Overlays 85
- Importing GPS Data 88
- Viewing a Timeline 90
- Setting Timeline Options 91
- Using Generic Text Files 94
- Using Addresses 95
- Using Geographic Coordinates 95
- Viewing Vector Data Fields 95
- Modifying Vector Data Display 96
- Importing Imagery 96
- Saving GIS Imagery 97
- What is a Map Projection? 98
- What Is a Datum? 102
- Mapping Color Styles 104
- Using a Single Color 104
- Using Random Colors 104
- Mapping Icons to Point Data 105
- Setting Icons Based on Fields 105
- Height Values for Text Fields 106
- Mapping Height Values 106
- Using Buckets for Field Data 107
- Saving the Sample File 108
- Importing the File 109
- Removing Duplicate Folders 110
- Adding Height Values 110
- Creating a Map Legend 110
- 3D Viewer Navigation 119
- Tour Mode Controls 121
- Side Panel Controls 121
- Switching to Full Screen Mode 125
- Setting the View Size 125
- Using the Overview Map 126
- Viewing Preferences 128
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