Aerial photographs play an important role in GIS data acquisition and visualization. First, they help provide a solid visual effect. Many people are more able to put spatial concepts into perspective when seeing photos. In addition, the secondary and perhaps more vital role is to provide a basis for gathering spatial information. Examples of this are features such as roads, vegetation, water features. Before this information can be gathered in a way that is useful for a GIS system, the aerial photographs must be prepared in a way that removes distortion from the image. This process is called orthorectification. Without this process you wouldn’t be able to do such functions as make direct measurements of distances, angles, positions, and areas. Read more
GIS Software Applications
Sunday April 27th 2003
Filed Under Software
List of GIS software applications. Read more
Java and GIS
Monday April 21st 2003
Filed Under Link Library, Programming
Java has been emerging as one of the programming languages of choice for GIS. This programming language is most commonly used in web GIS applications. Read more
