第1个回答 2011-04-15
GIS based on the solution space/geographic coordinates for the main purpose computer system. It was founded in based on the data of data is the soul of GIS. Data into vector data and raster data. Vector data and raster data formed GIS data model. Through the data model and advanced computer technology we can draw many maps of main elements, symbols, and also can simulate the terrain, also can saying is the virtual reality technology. GIS application in many aspects, such as mapping, environmental protection, urban planning, communication, transportation etc many aspects. It's main use is the spatial analysis, spatial analysis can solve a lot of problems. Its aim is to provide a space framework -- in this system, we can use the rationalization of the earth's resources and the sustainable development of human environment management decision support.
第2个回答 2011-04-23
GIS is based on solving spatial / geographical coordinates for the main purpose of the computer system. It is built on the basis of the data, the data are GIS soul. Data into vector data and raster data. Vector data and raster data composed of a GIS data model. Through the data model and advanced computer technology that we can draw the main elements of the map, symbols, etc., but also to simulate the terrain - can be said that virtual reality technology. GIS used in many areas, such as cartography, environmental protection, urban planning, communications, transportation and many other aspects. It is the most important use of spatial analysis, spatial analysis can solve many problems. Its goal is to provide a space frame - in this system, we can rationalize the use of earth resources and the sustainable development of the human environment management decision support.
The most important GIS data, which comes from the original digital map data, remote sensing images, measurement data, digital data and text reports. Data obtained through the analysis, after screening, you can put into the database. It is worth mentioning that, GIS data with data quality indicators, the indicators are micro and macro level, micro-bit precision is specified, attribute accuracy, logical consistency and resolution of differences, the macro level refers to the integrity of the data , time, regional.
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