Space-Time-Attribute Analysis

The GIS database usually consists of three principal types of information: 1. Geographic or location information (Where): Geographic space is bi-dimensional or tri-dimensional and can be regarded as continuous. In a map, this can be a point with latitude and longitude (bi-dimensional) or a point with latitude, longitude and elevation or depth (tri-dimensional). 2. Temporal Details (When): Temporal space…

Map Projections

Map projection is the technique to portray round Earth on the flat surface. Let’s look at the technique and it’s significance. Here is the map as we normally see it. Look at the map for few seconds. Now, What’s the size of Africa? Is the size of Africa true in relation to the size of other countries in…