Scale and accuracy of digital map for planning
Nowadays, digital maps are gradually replacing paper maps in the planning of urban areas, industrial zones and many other works. Scale is a basic technical feature of both traditional paper maps and digital maps. This article showed the basic technical elements of digital maps depend on the scale. The paper analyzes the two basic characteristics: accuracy and degree of generalization depending on the scale of the map. In the article, the author surveyed, analyzed the precision of point estimate, also line, area, volume and the density of points depend on scale. The difference of the paper maps and the maps which is zoomed when displayed on the screen was indicated. The author compared the process of establishment and using paper maps with digital maps. Through these surveys and analyses, it’s easier to select and use the necessary scale for digital maps, according to regulations, so that the problems of design and planning will meet the requirements set.
Keywords: digital map for planning; scale of the digital map; accuracy of map; density of points and degree of generalization of the map; zoom in/out the digital map.