We should select the 1: 50000 scaled aero-photo or the 1:50000 scaled image by digital aerophotography as the main source for the monitoring of water and soil conservation measure in this area;

  • 应以比例尺不小于1:5万的传统光学航空摄影影像或数码航摄数据作为该区水土保持措施监测的主要信息源;

  • 互联网摘选 2025-01-19 23:56:30

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