If one wishes to produce a world map that displays area-based data, such as the extent of rain forests, the range of butterfly migrations, or the access of people in various regions to medical facilities, then it is often appropriate to use a base map that shows the areas of all regions of the earth’s surface in their correct proportions. Such a map is called an equal area or equivalent map by ...

tourism as a growing industry needs special attention in developing countries. during last decades, nature based tourism has been growing faster than other tourism fields and it seems to grow even faster. ever growing demand for nature based tourism emphasizes the necessity of a holistic planning for preserving environment against degradation. objective of this study is to present a nature base...

Our goal is to represent a given 2D shape with an automatically determined number of ellipses, so that the total area covered by the ellipses is equal to the area of the original shape without any assumption or prior knowledge about the object structure. To solve this interesting theoretical problem, first we employ the skeleton of the 2D shape which provides important information on the parame...

Geographic visualisation and other real-time applications require efficient data access. An indexing mechanism, adapted to the characteristics of geographic data, can be used to improve retrieval of geographic data. This paper describes an indexing mechanism based on a method called Ellipsoidal Quadtree, EQT. EQT adapts the indexing structure of a database to the shape of the earth. EQT fulfils...