The Gravitation field of Forssa
The main attention in the present study was focussed on quantitative observations of the influence that centres have on their surroundings. The relative area of influence of Forssa, which is situated in south‑western Häme, was selected as the empirical experimental area of the gravitational models....
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Geographical Society of Finland
1972-01-01
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Series: | Fennia: International Journal of Geography |
Online Access: | https://fennia.journal.fi/article/view/40777 |
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doaj-c587422860544588b0dbcd821a11b0972020-11-25T02:11:19ZengGeographical Society of FinlandFennia: International Journal of Geography1798-56171972-01-011151The Gravitation field of ForssaKauko Mikkonen The main attention in the present study was focussed on quantitative observations of the influence that centres have on their surroundings. The relative area of influence of Forssa, which is situated in south‑western Häme, was selected as the empirical experimental area of the gravitational models. Gravitation was measured by the frequency of visits made to the centres, and the distance variable in the gravitational models was road‑distance. The linear model of the Pareto‑type as well as the square model were employed as functions expressing field force. In central class III, the square model appeared to adjust itself better to empirical changes in field force than the linear model, while in the lower class of centrality, class II, the models were approximately equal. As a whole, the differences in the explanatory degree of the models were so slight that the linear model could be interpreted as a reliable and, due to its simplicity, a very useful function to express field force. The decline in gravitation was studied in detail with the help of 4 profiles of field force as well as linear graphs calculated by sectors. The areal distribution of field force was illustrated by isarithmic maps. For their preparation the values of field force were computed by areal units with the aid of the filtering method, which was further improved by weighing coefficients. The general applicability of the method has already been verified in the treatment of data of visiting frequencies covering the whole country. https://fennia.journal.fi/article/view/40777 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kauko Mikkonen |
spellingShingle |
Kauko Mikkonen The Gravitation field of Forssa Fennia: International Journal of Geography |
author_facet |
Kauko Mikkonen |
author_sort |
Kauko Mikkonen |
title |
The Gravitation field of Forssa |
title_short |
The Gravitation field of Forssa |
title_full |
The Gravitation field of Forssa |
title_fullStr |
The Gravitation field of Forssa |
title_full_unstemmed |
The Gravitation field of Forssa |
title_sort |
gravitation field of forssa |
publisher |
Geographical Society of Finland |
series |
Fennia: International Journal of Geography |
issn |
1798-5617 |
publishDate |
1972-01-01 |
description |
The main attention in the present study was focussed on quantitative observations of the influence that centres have on their surroundings. The relative area of influence of Forssa, which is situated in south‑western Häme, was selected as the empirical experimental area of the gravitational models. Gravitation was measured by the frequency of visits made to the centres, and the distance variable in the gravitational models was road‑distance. The linear model of the Pareto‑type as well as the square model were employed as functions expressing field force. In central class III, the square model appeared to adjust itself better to empirical changes in field force than the linear model, while in the lower class of centrality, class II, the models were approximately equal. As a whole, the differences in the explanatory degree of the models were so slight that the linear model could be interpreted as a reliable and, due to its simplicity, a very useful function to express field force. The decline in gravitation was studied in detail with the help of 4 profiles of field force as well as linear graphs calculated by sectors.
The areal distribution of field force was illustrated by isarithmic maps. For their preparation the values of field force were computed by areal units with the aid of the filtering method, which was further improved by weighing coefficients. The general applicability of the method has already been verified in the treatment of data of visiting frequencies covering the whole country.
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url |
https://fennia.journal.fi/article/view/40777 |
work_keys_str_mv |
AT kaukomikkonen thegravitationfieldofforssa AT kaukomikkonen gravitationfieldofforssa |
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