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Method for constructing farmland electronic map based on micro-irrigation engineering design data |
LI Renlu1,2, WAN Shuqin1*, KANG Yuehu1,2, LI Xiaobin1 |
1. Key Laboratory of Water Cycle and Related Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract In view of high cost of electronic map acquisition in farmland with micro irrigation equipment, a method for rapidly constructing electronic map of farmland based on micro-irrigation enginee-ring design data was proposed. There are some differences in models and expressions of various spatial elements between micro-irrigation engineering design data and farmland electronic map data, especially there are exaggeration, simplification and omission etc for spatial elements in micro-irrigation equipment in the micro irrigation engineering design data. Importantly, there is often a lack of geographic location information description for micro irrigation equipment and other spatial elements in the data. Considering those key points, based on the systematic understanding of micro-irrigation engineering, and through an in-depth analysis of the differences between data model and element expression between design data and farmland electronic map data, an analytical transform method is present in this paper. In the method the dwgdirect.net class library was combined with user programs of ArcGIS Engine to convert the design data in CAD format to the geodatabase format supported by GIS. As a result, a micro irrigation engineering farmland electronic map was preliminarily constructed, and provides a reference for micro-irrigation engineering construction, but also supplies basic data of farmland electronic map to precision agriculture.
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Received: 19 November 2018
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WEI Xue,,,, ZHOU Beibei,,,, WANG Quanjiu,,,. Effects of canal lining on soil organic matters in Jing Huiqu Irrigation District and their spatial variability[J]. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(3): 222-227. |
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