Google Earth has evolved from being a mere curiosity to
being a tool that is commonly used in business. Google Earth has been used for
everything from plotting demographic data to video production. Not surprisingly,
there are a number of add-ons available for this highly versatile tool. This
article discusses five such add-ons.

This article is also available as a TechRepublic Screenshot Gallery.

Five Apps

1. SketchUp

is a free utility that allows you to create 3D models for Google Earth. The
program is basically a CAD tool, and although it offers Google Earth support,
it can be used to create other types of drawings and 3D models as well. Perhaps
one of the most useful features is that you can download 3D buildings and other
objects from an online library. Once you do, you can use the model in its
existing form or you can use the drawing tools to modify it.

2. RoboGEO

is a utility for geo tagging image files. Geotagging can be based on Google
Earth, an NMEA file, a waypoint file, a track file, or any number of other
sources. It is also possible to manually enter GPS information. The geo tagging
data is added directly to the file’s meta data and you are also given the
opportunity to add a title to the image.

A personal license for RoboGEO sells for $79.99, but a free
trial is available for download.

3. Google Earth KMZ or KML to GPS Converter

Earth KMZ or KML to GPS Converter
is a tool that you can use to convert
Google Earth data to a GPS compatible format (a .GPS file). The utility allows
you to import the KMZ or KML files that you create with Google Earth and then
use them to build waypoints, routes, or tracks. You can import KMZ files in any
order and arrange the locations in the preferred order before exporting them.

Google Earth KMZ or KML to GPS Converter sells for $20, but
you can perform ten free trial conversions.

4. Google Earth API

The Google
Earth API
is a free tool for building onto Google Earth. One of the best
parts of the API is the Google Earth Plug-in. You can use this plug in to
display Google Earth (and any custom features) within a Web browser.

The plug in seems to have problems with Internet Explorer
10, but works fine in Internet Explorer 10 Compatibility View. It is also worth
noting that Google provides numerous code samples that you can use to add
Google Earth imagery to your Web site.

5. Cache for Google Earth

for Google Earth
is a utility that allows Google Earth to be used while
working offline. Google Earth does offer a built in cache that can be used for
offline use, but the cache’s contents can be a little bit unpredictable to say
the least. This utility allows you to save the cache contents while they are in
a predictable state and then retrieve them for later use.

This utility will likely be useful to those who use Google Earth
outside of their office. For example, I
built a drone that can be GPS controlled
. The drone’s position is tracked
through a specialized interface that uses Google Earth maps. The problem is
that when I am in the field, there is often no Wi-Fi link available for
downloading Google Earth imagery. For this type of application, Cache for
Google Earth could potentially be used to make the imagery portable.

Cache for Google Earth sells for $19.00, but a free trial is
available for download.