Bringing forward mapping of spatial data, which is based on studying of symbol criterion in existing surveying department.
研究现有测绘部门的符号规范，实现了空间数据符号映射匹配。
Bringing forward mapping of spatial data, which is based on studying of symbol criterion in existing surveying department.
研究现有测绘部门的符号规范，实现了空间数据符号映射匹配。
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