The paper introduced the key technology of making thematic map symbols library that servered for Ming Great Wall resource investigation of Gansu.
介绍了甘肃省境内明长城专题地图符号的制作方法，对长城影像地图专题符号制作的关键技术进行探讨和研究；
Gansu Provincial Library possesses an original edition of Sikuquanshu which was named Wensuge in the forty-seventh year of Qianlong.
甘肃省图书馆藏有乾隆四十七年抄成的文溯阁《四库全书》正本一部。
Gansu Provincial Library possesses an original edition of Sikuquanshu which was named Wensuge in the forty-seventh year of Qianlong.
甘肃省图书馆藏有乾隆四十七年抄成的文溯阁《四库全书》正本一部。
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