Later, you will be able to classify earthquakes according to their magnitude, the sixth field. To enable the GIS to map according to magnitude, you must take out these magnitude text strings, thereby making the field numeric. Verify that you have made changes listed in steps 1 through 7 above. You can look at point, line, area, and image data. Points represent data such as traffic lights or trees.
Lines represent data such as pipelines or roads.
Areas represent data such as states or lakes. Images are aerial photographs, computer-generated images, or satellite images. Click Views, and New. Save your project in your own directory. Add your earthquake data.