A simple geometric shape is overlayed on top of the iceberg image. The shape is measured and its area hand calculated based on a scale of miles for the image. This method provides a very rough estimate of the iceberg’s area.

When precision is not necessary and you need a quick estimate.

When specialized software such is used in method 2 is not avaliable.

Specialized software is used to trace the outer border of the iceberg image and automatically calculates the area for you. This method yields a fairly precise measurement.

When you need a precise measure of an iceberg’s area.

When the specialized software is available.