This standard specifies the surveying and mapping content and basic requirements of digital topographic maps (digital line maps, digital elevation models, digital orthophotos and digital raster maps). This standard is applicable to the 1:500, 1:1000, 1:2000 basic topographic surveys in Ningbo, as well as cadastral surveys, real estate surveys and other engineering surveys with topographic survey content. It is one of the basic bases for various departments to use digital topographic maps to build geographic information systems, as well as to carry out planning, design, construction, management, scientific research, etc.
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