Gravitational Attraction Fields for Population in Turkey

Inspired by the gravitational attraction of the masses in Physics, the gravitational pull between the settlements has been proven to be an important phenomenon in explaining potentials that arise among towns. Again inspired by the Electro-magnetic fields in Physics, in this paper, the gravitational attraction between the cities is assumed to be exerted on a city with a certain “charge” on a map of superimposing “charges” of different cities. Following this line, an attraction field has been presented for different census years on city basis in Turkey and possible implications have been evaluated. The values for the year 2000 on the other hand have been tested with other factors including the GNP per head, population and the literacy rate to see the impact of these forces on the tendencies to move in and out of the cities, that is the migrationary effects. The study is as well done seperating the country into a West and an East to see if there are striking differences in between.

Computerised Applications and Evaluation Methods in Land Zoning

Land Zoning is an important issue in urban & regional planning, requiring heavy computational burden. Another challenge ihaving to decide on the parameters to be used in the evaluation. This paper takes the transportation-communication frequency and the rent-inflator interactions between different zonetypes (with possible coefficients) as the major elements in zone-evaluation. For the type of evaluation on the other hand three alternative methods were used. One of these methods only considers one-way interactions in rent-inflator relations. Another one is developped to include a self-updating mechanism on the same interactions. The third of the methods meanwhile attempts to take in account the topological factors. A software was developped in C++ that uses the Manhattan Metric to calculate the distances. The program prompts the user to feed in the evaluation method, different interaction coefficients as well as different landtypes and different maps. The software, based on the preference can either use a steepest descent heuristic or an enumeration algorithm.