【摘要】 地理信息变化发现是地理信息数据更新的重要步骤。传统地理信息变化发现是通过遥感影像解译和外业调绘核查来实现,成本高,效率低。使用模板化网络爬虫技术对网络文本信息进行检索,可以实现部分地理信息要素的变化自动发现,提高地理信息数据更新的效率与准确性。更多还原

【Abstract】 The discovery of geographic information change is an important step in the updating of geographic information data. The discovery of geographic information change is realized through the interpretation of remote sensing image and the verification of field operation,which has high cost and low efficiency. Using template-based web crawler technology to retrieve Web text information,we can achieve some changes in geographic information elements automatically and improve the efficiency and accuracy of updating geographic information data.更多还原