The Data Check In Advance And Preprocessing System Of Geographic National Census Based On AE

The first geography national census is a major survey of national conditions and strength, It is an important means to obtain comprehensive geographic national conditions in China, it is a basic work that grasp the basic situation of natural, ecological and human activities. Census goal is to use basic surveying and mapping and geographic information data, thematic data and high resolution satellite remote sensing image data, according to the unified standard to establish a complete, continuous in space database of geography national census database.It lays foundation for the carry out normalization geographical conditions monitoring.Geographic National Census data need to be checked in advance and preprocessing before building the database. When the production unit get the census data,it have the data does not conform to the state regulations situation,so its need to checked in advance and preprocessing.The paper use first geography national census of Anhui Provin as an example, according to the Anhui Province census outcome data for the design of this data checked in advance and preprocessing system. Geographic information system (GIS) is a major application of this subject in this geographical conditions census practice.The paper introduces the principle of GIS and its application in the survey.Through the analysis of the survey results data and ArcGIS Engine components for system development obtained data preview and pretreatment function. The data preview module includes file complete inspection, national conditions element check, metadata check, Interpretation of sample check and river system logic check, data pre processing module comprises coordinate setting, elements explode, element Logic processing, network data production, layer and attribute structure adjustment, element object coding, unique code. Through the realization of the above functions, you can found not in line with the results of the standard data, then use the preprocessing function of the system and combined with the manual operation to make the data to meet the storage requirements.