As to technology and economic cost synthetically, extracting urban vegetation features by vegetation indices from Thematic Mapper (TM) images is a comparatively good way.
利用植被指数从TM影像中提取植被，从技术与经济成本方面综合考虑，是一个比较好的手段。
As to technology and economic cost synthetically, extracting urban vegetation features by vegetation indices from Thematic Mapper (TM) images is a comparatively good way.
利用植被指数从TM影像中提取植被，从技术与经济成本方面综合考虑，是一个比较好的手段。
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