Practical exercise for Remote Sensing in Google Earth

Author: Dr. Géza Király, 4th of May 2010.
v5: changed: 19th of November, 2013.

The main aims of the exercise are to get familiar with the different remote sensing imageries, and to practice the visual interpretations.

1. Download, install and start Google Earth:

2. Select Your area.

3. Description of Your area (few sentences, paragraphs).

4. Description of the imagery about the selected area. Type of the sensor, resolutions (geometric, spectral, radiometric), date of imagery, etc. You may use the ’Ruler’ (for approximate the geometric resolution), the Copyright (e.g. © 2010 Cnes/SpotImage), the Imagery date (e.g. Imagery Date: Jul 15, 2006), and the coverage of different images (Layers\More).

5. Delineation of the polygons. It is important to delineate the areas, and to create the description (or at least one part) based on the imagery. Do visual interpretation! All the polygons should be connected and consequent!

  • My Places(right click)\Add\Folder
    Give the name of the exercise (folder) here, and its description, e.g.: X.Y.’s remote sensing exercise. Here You can give the general description of the selected area (Point 3.) and the description of the imagery (Point 4.)
  • After (right click)\Add\Polygon
    Name and description of the areas, e.g.: old deciduous stand, middle aged conifers, etc.
    Set the colour and transparency of the outline and fill at ’Style, Color’ tab.

There are a lot of possibilities to create several hierarchic levels, such as natural forests, plantations, etc.
Minimum 5, connected polygons should be created. Right click on the folder/exercise ’Save As…’ to save Your work in *.kml or *.kmz (zipped) format. The kml has the advantage of easily editable by any text editor, the kmz is better for emailing, and send the final version to:

Sopron, 4th of May 2010.

Dr. Király, Géza
associate professor