【摘要】 鉴于数字影像元数据没有严格的标准,使得元数据获取或产生时存在很多问题.为了保证数据的正确和以后数据的共享及方便数据库更新,便于基础地理信息数据采集和建库工作,入库前必须对数字影像元数据进行检查.针对数字影像元数据的特点,对其元数据按其属性值分3类,即数值型的、字符型的、空与非空型的数据.每类数据给出了相应的检查方法,比如范围值法、可能值检查法、精度检查法、固定值检查法等.对数字影像元数据的检查校正工作带来较大方便.更多还原

【Abstract】 Because there is no strict criteria of digital image metadata,it makes many problems when metadata is obtained or generated.In order to ensure metadata correct and the later data sharing and to facilitate database update and data collection and construction of library work,metadata must be checked.For characteristics of digital image metadata,metadata is divided into three kinds according to its attribute value,the numerical value,character and the empty data,each metadata has produced the corresponding inspection method,for instance,scope value,possible value inspection method,precision inspection method,fixture inspection method and so on.Checking the metadata causes great convenience in the work.更多还原