Google Earth and Google Maps are great tools to view high-resolution satellite imagery of the Earth.
Google Earth Plus was discontinued in 2008, but had such features as higher resolution and allowing consumer printing. It has been replaced by Google Earth Pro.
Most land areas in Google Earth are covered in satellite imagery with a resolution of about 15 meters per pixel and highest resolution is about 1 inch per pixel.
Google Earth is an application which allows us to see satellite and plane images of the Earth. It works like a high resolution virtual globus.
Actually its not the altitude of the satellite but the resolution of the camera that is responsible for a high resolution imagery. In fact the better resolution imagery in Google Earth comes from aerial and street-level photography.
Most land areas in Google Earth are covered in satellite imagery with a resolution of about 15 meters per pixel and highest resolution is 1 inch per pixel. At the highest resolution of once-inch resolution where each pixel represents one inch (or 2.54 centimeters). It won't appear blurry until you descend below 50 feet or so. Most of the high-resolution imagery is aerial photography taken from aircraft flying at 800-1500 feet rather than from satellites. See KML in related links to see examples of each resolution.
There are some strange things you can find on the high resolution satellite and StreetView imagery available in Google Maps and Google Earth. The Google Earth Community (GEC), Google Earth Blog, and Google Earth Hacks are probably the best web sites to visit to see what other users have found in Google Earth/Maps. See related questions and links below.
Earth view is a feature in Google Maps (available since 2010) that allows you to see the same high-resolution imagery, terrain, and 3D buildings that are available in the desktop version of Google Earth.Earth view mode in Google Maps is only available to those that have installed Google Earth. It uses the Google Earth plugin in your web browser.
Google Earth dynamically draws the map so the scale depends on the screen resolution and the zoom factor. An inch measured on a 15" monitor with 1024x768 pixel resolution would be quite different than an inch on a 40" monitor with 2560x1600 pixel resolution. At the max zoom level Google Earth shows approximately one feet per inch. To display the map scale in Google Earth you select 'Scale Legend' option in the View menu. This will show the scale in feet/miles or meters/km depending on your units preference.
In Google Earth or Google Maps you can enter your address and start viewing your neighborhood. In both you can see high-resolution photographs in Street View. Google Earth is an application you can download for free and Google Maps is a web-based map. See related links.
You cannot physically go to Mars using Google Maps as it only provides mapping information for Earth. To explore Mars, you can use tools like Google Earth or NASA's Mars Trek, which offer data and imagery of the Martian surface.
In other words can the resolution of imagery in Google Earth (or Google Maps) allow you read the text on tombstones. In practice Google's high resolution Street View photographs allow you to read larger letters on T-Shirts and most street signs. Google Street View takes imagery on public roads so it's not likely to capture such photographs in a cemetery but if Google did take Street View photographs in such a place then it would be possible to read some of the large letters on the tombstones if the contrast and lighting was good. So in theory you could with enough-resolution read the large print letters. If anybody finds a readable tombstone inscription in either Google Earth or Google Maps then add a note in the Discussion Area of this topic.