Planimetric Features Generalization for the Production of Small-Scale Map by Using Base Maps and the Existing Algorithms
- 1Professor at Malek Ashtar University of Technology, Esfahan, Iran
- 2M.s degree of Information Technology Management, Iran
- 3B.s degree of Surveying Engineering, Iran
- 4M.s of degree of Remote Sensing, Dept. of surveying and Geomatics engineering, University of Tehran, Tehran, Iran
Keywords: Planimetric Features, Generalization, Small-Scale Maps, Base Map, NGO Data Model
Abstract. Cartographic maps are representations of the Earth upon a flat surface in the smaller scale than it’s true. Large scale maps cover relatively small regions in great detail and small scale maps cover large regions such as nations, continents and the whole globe. Logical connection between the features and scale map must be maintained by changing the scale and it is important to recognize that even the most accurate maps sacrifice a certain amount of accuracy in scale to deliver a greater visual usefulness to its user. Cartographic generalization, or map generalization, is the method whereby information is selected and represented on a map in a way that adapts to the scale of the display medium of the map, not necessarily preserving all intricate geographical or other cartographic details. Due to the problems facing small-scale map production process and the need to spend time and money for surveying, today’s generalization is used as executive approach. The software is proposed in this paper that converted various data and information to certain Data Model. This software can produce generalization map according to base map using the existing algorithm. Planimetric generalization algorithms and roles are described in this article. Finally small-scale maps with 1:100,000, 1:250,000 and 1:500,000 scale are produced automatically and they are shown at the end.