问题 问答题

“某市交通可视化信息管理系统”,是在空间数据库基础上,利用GIS应用平台,通过空间分析、专题制图、三维模拟显示等手段,处理各条道路、各道路交叉口监控数据与车流监测数据,从而提高该市道路交通信息化水平,同时为道路交通管理决策提供辅助支持。
问题:

试述数据库数据质量控制的内容。

答案

参考答案:数据库数据质量控制内容包括数据采集前准备工作、数据生产过程中的质量控制、数据检查与验收、入库数据处理质量以及数据质量评定等内容。
1)数据采集前的准备工作
数据采集前的准备工作是数据质量控制的基础,包括制定相应的技术标准、质量控制内容和策略、学习和理解有关技术文件、收集和检查基础资料、进行软硬件配置和检校设备等。
2)数据生产过程中的质量控制
在数据生产过程中,可采用工序检查制度等方式,对生产过程中每一个环节进行质量控制。对可能产生误差的生产过程加以控制,对检查出的误差进行修改。
3)数据检查
数据成果上交前应进行100%二级检查。第一级检查为过程检查,由数据生产单位的检查人员实施;第二级检查为最终检查,由数据生产单位的专门质量管理机构负责实施。各级检查工作必须独立完成,不得省略或代替。
4)数据验收
数据上交后,应进行验收。验收工作由任务委托单位组织实施。验收内容主要包括基本要求、数学精度、图形或影像质量、属性精度、逻辑一致性、完备性、现势性、附件质量等。
5)入库数据质量控制(略)

填空题

Part 2


Questions 9-18


Read the following passage and answer questions 9-18.
1. Most young people enjoy some forms of physical activity. It may be walking, cycling or swimming, or in winter, skating or skiing. It may be a game of some kind football, golf, or tennis. It may be mountaineering.
2. Those who have a passion for climbing high difficult mountains are often looked upon with astonishment. Why are men and women willing to suffer cold and hardship, and to take risks on high mountains This astonishment is caused probably by the difference between mountaineers and other forms of activity to which men give their leisure.
3. Mountaineering is a sport and not a game. There are no man-made rules, as there are for such games as golf and football. There are, of course, rules of a different kind which would be dangerous to ignore, but it is this freedom from man-made rules that makes mountaineering attractive to many people. Those who climb mountains are free to use their own methods.
4. If we compare mountaineering with other more familiar sports, we might think that one big difference is that mountaineering is not a "team game". We should be mistaken in this. There are, it is true, no "matches" between "team" of climbers, but when climbers on rock face linked by a rope on which their lives may depend, there is obviously teamwork.
5. The mountain climber knows that he may have fight forces that are per and more powerful than man. He has to fight to against the forces of nature. His sport requires high mental and physical qualities. A mountain climber continues to improve in skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions are in their early twenties. But it is not unusual for a man of fifty or sixty to climb the highest mountains in the Alps. They may take more time than young man, but they probably climb with more skill and less waste of effort, and they certainly experience equal enjoyment.

Questions 9-13


·For questions 9-13. choose the best title for each paragraph from below.
·For each numberedparagraph (1-5), mark one letter (A-G) on the Answer Sheet..
·Do not mark any letter twice.
  • A. Mountaineering is different from golf and football.
  • B. Mountaineering is treated as a team sport.
  • C. The requirements needed for climbers.
  • D. Many young people enjoy some forms of physical activity.
  • E. A mountain climber’s skill is not limited by his age.
  • F. The reason why people enjoy climbing mountains.
  • G. Mountaineering is a sport rather than a gam

Paragraph 2: ______

判断题