Data sources, both commercial and free, in GIS format covering the continent of Africa. Find cadastral, environmental and cultural data.
The recent conflict in the country of Georgia has led to the question of “where’s Georgia?” on Google Maps. Some sources claimed that Google removed … Read more
Data quality is the degree of data excellency that satisfy the given objective. In other words, completeness of attributes in order to achieve the given … Read more
There are several ways in which to bring spatial data into a GIS. This article provides a brief overview of some of the more common methods for creating vector GIS data.
Hypsography, topography, elevation, TINS, and contours. There are many different terms for data relating to elevation. This article reviews some of terminology and types of … Read more
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 … Read more