This example involves two sets, A and B, represented here as coloured circles. The orange circle, set A, represents all living creatures that are two-legged. The blue circle, set B, represents the liv ...
The word "polygon" comes from Late Latin polygōnum (a noun), from Greek πολ?γωνον (polygōnon/polugōnon), noun use of neuter of πολ?γωνο? (polygōnos/polugōnos, the masculine adje ...
In geometry a polygon /?p?l?ɡ?n/ is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain or circuit. These segments ar ...
Tomlin’s contributions to GIS extend across a number of years and a wide variety of applications. As a student at Harvard University in the mid-1970s, he developed the Tomlin Subsystem of IMGRID as a ...
Soil contamination from heavy elements can be found in the urban environments, which can be attributed to the transportation and industries along with the background levels (minerals-leaching heavy el ...
In human geography, a catchment area is the area and population from which a city or individual service attracts visitors or customers. For example, a school catchment area is the geographic area from ...
While infrastructure development may initially be damaging to the natural environment, justifying the need to assess environmental impacts, it may contribute in mitigating the "perfect storm" of envir ...
According to the Online Etymology Dictionary, the word infrastructure has been used in English since at least 1927, originally meaning "The installations that form the basis for any operation or syste ...
Hydrology has been a subject of investigation and engineering for millennia. For example, about 4000 BC the Nile was dammed to improve agricultural productivity of previously barren lands. Mesopotamia ...
Transportation planning, or transport planning, has historically followed the rational planning model of defining goals and objectives, identifying problems, generating alternatives, evaluating altern ...
In the United States of America, public utilities are often natural monopolies because the infrastructure required to produce and deliver a product such as electricity or water is very expensive to bu ...
Definitions in graph theory vary. The following are some of the more basic ways of defining graphs and related mathematical structures.Graph In the most common sense of the term, a graph is an ordered ...
A geometric network is composed of edges that are connected. Connectivity rules for the network specify which edges are connected and at what points they are connected, commonly referred to as junctio ...
Topology began with the investigation of certain questions in geometry. Leonhard Euler's 1736 paper on the Seven Bridges of K?nigsberg is regarded as one of the first academic treatises in modern top ...
In hydrological and fluvial landforms, the thalweg is a line drawn to join the lowest points along the entire length of a stream bed or valley in its downward slope, defining its deepest channel. The ...
