Cartometric evaluation of digital cartographic database suitable for urban management by means of cartographic generation from 1:2000 original scale

Abstract

This dissertation presents PARANACIDADEs cartographic products as well as the cartographic problems existing in the municipalities urban digital databases. These problems are due to the scale reduction of the derived maps for 1/5.000 scale. The derived maps can be affected by geometric and semantic problems if they have smaller scale than the original one. The geometric conditions that can be perceived in the represented features are congestion, coalescence, conflict, complication or difficulty, inconsistency and imperceptibility. This way, it is necessary to evaluate and review the features representation for the derived map, taking into account cartographic generalization concepts, in such a way to adapt it to the new representation scale. The evaluation carried out in the cartographic database in 1/5.000 scale contributes to the understanding of visual representations in cartography. The evaluation of the derived 1/5.000 map is made visually and for each detected geometric condition a manual generalization procedure is executed. This approach is based on user understanding of the graphically represented features. As a result, to apply the geometric evaluation and cartographic generalization procedures gave rise to a cartographic product closer to the 1/5.000 scale map specification.