地图变化信息量评价模型在地图更新中的应用

地图是一个城市整体面貌的重要窗口，地图所提供的地理空间信息要尽可能地反映当前最新的情况。地图更新工作是保证地图准确性、现势性的重要途径。基于保证地图更新的准确、全面、和及时的目的，详细介绍地图信息量变化模型概念，采用将地图变化信息量评价模型用于地图要素的更新的方法，通过《南宁市城区地图》两个不同年代要素更新实例，验证该方法准确、可靠，具有很强的实用性。

Application of Map Update Based on the Informative Evaluation Model of Map Changes

Map is an important window for the overall appearance of the city ,the map of geospatial information pro-vided to the extent possible to reflect the most current situation .Map update job is to ensure the accuracy of the map ,is the potential of an important way .Based map updates ensure accurate ,comprehensive ,objective and timely ,detailed In-formative evaluation model of Map Changes ,changes in the amount of information used to map elements of the evaluation model for map updating method ,through the“map of Nanning City”,two different update the instance′s elements to veri-fy that the method is accurate ,reliable,and highly practical .