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Remote Sensing Technology and Application  2010, Vol. 25 Issue (4): 502-509    DOI: 10.11873/j.issn.1004-0323.2010.4.502
article     
Fast Approach for Querying Coverage of Multi-source RS Data and Its Realization Based on ENVI/DL1
MIAO Li-xin1,2,LI Xia2,ZHOU Lian-fang3,WEN Qiang2,JI Zhong-kui2,XIONG Zhi-ming2,JIN Guang-ming2,HU Lin-hua2
.Research Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091,China;2.Twenty First Century Aerospace Technology Co.,Ltd.Beijing 100096,China;3.China Land Surveying & Planning Institute,Beijing 100035,China
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Abstract  

A preliminary work for remote sensing applications on large region is to query the coverage of certain remote sensing data and to know whether there are substitutes with similar scales for regions covered by clouds or snows,or for regions not covered by this kind of data.Generally speaking,the querying systems of all kinds of satellite data are independent,which makes the querying for coverage of multi\|source remote sensing (RS) tiring and time consuming.To fast query the coverage of RS data on large regions,a batch processing approach is proposed and a tool is developed based on ENVI/IDL.Firstly,the metadata are read from the text file.Secondly,the outline vector is generated with desired attributes.Thirdly,the four corners of the valid range of image data are detected.Finally,the preview picture is registered automatically.The georeferenced images and the outline vectors can be overlaid correctly with the vector of administrative boundaries according to their geographic coordinates.After proper metadata format selected and the input directory and the output directory input,the software begins to run in the batch mode without any interactive.It will finish the task very soon.This approach can greatly improve the query efficiency of multi\|source RS image coverage.Then decision can be made according to whether the valid coverage can meet the demand of the application.Thus the approach mentioned above and the software developed according to it are very practical and worthy of popularization.

Key words:  RS data      Coverage      Query      Preview      Outline vector     
Published:  21 October 2010
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Articles by authors
MIAO Li-xin
LI Xia
ZHOU Lian-fang
WEN Qiang
JI Zhong-kui
XIONG Zhi-ming
JIN Guang-ming
HU Lin

Cite this article: 

MIAO Li-xin, LI Xia, ZHOU Lian-fang, WEN Qiang, JI Zhong-kui, XIONG Zhi-ming, JIN Guang-ming, HU Lin. Fast Approach for Querying Coverage of Multi-source RS Data and Its Realization Based on ENVI/DL1. Remote Sensing Technology and Application, 2010, 25(4): 502-509.

URL: 

http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2010.4.502     OR     http://www.rsta.ac.cn/EN/Y2010/V25/I4/502

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