Classificação de dados geográficos e representação cartográfica

discussões metodológicas

Abstract

The classification of data is an important step towards the elaboration of choropleth maps because the use of colors will be attributed to the basic spatial units in accordance with the classes defined. Another representation for quantitative data analysis is made through the usage of proportional symbols, which are appropriate to the data related to the dimension of the Basic Spatial Unit in relation to the phenomenon under consideration. At a given moment the responsible for the cartographic representation, which will be led to organize the presented data, and for that to happen, it is necessary to define the number of classes to be adopted, which colors or symbols scheme is the most appropriate and, among several classification criteria, which is the best appropriate for the phenomenon under study. In this work, contributions for better understanding and use with methodological basis of the criteria more commonly adopted in the classification and visual representation of geographic data to produce graphs, choropleth maps, maps of
proportional symbols or, in addition, to explore the existing relationship between them.