Using the Normalized Difference Water Index (NDWI) within a Geographic Information System to Detect Swimming Pools for Mosquito Abatement: A Practical Approach
Using the Normalized Difference Water Index (NDWI) within a Geographic Information System to Detect Swimming Pools for Mosquito Abatement: A Practical Approach
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DOI：
10.3390/rs5073544
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发表时间：
2013-07
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影响因子：
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通讯作者：
S. K. McFeeters
中科院分区：
文献类型：
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作者：
S. K. McFeeters
蚊子传播的疾病影响着全世界数百万人。在美国，自1999年以来，西尼罗河病毒（WNV）已感染36，801人，并导致1，580人死亡。在加州，自2002年以来，已有近3,600人感染了西尼罗河病毒，另有124人死亡。事实证明，对远程和空间数据的分析有助于研究包括西尼罗河病毒在内的蚊媒疾病。这项研究提出了一个有效的程序，以确定游泳池，可能作为潜在的蚊子栖息地。该程序从高分辨率多光谱图像中获得归一化差异水指数（NDWI），以检测地表水的存在，然后将基于矢量的数据层纳入GIS中，以确定具有可检测水的住宅地块。这项研究比较了被识别为有水的包裹（535）和已知有游泳池的包裹（682），准确率为78.4%。在147个有游泳池的地块中，有19个地块的后院有足够的植被，可以从卫星上掩盖游泳池的存在。其余128个包裹缺乏足够的地表水，NDWI表明它们实际上有地表水。那么，与此类包裹相关的游泳池中可能有足够的水，可以为蚊子提供足够的栖息地，因此灭蚊人员进行现场检查是合理的。
Mosquito-borne diseases affect millions of people worldwide. In the United States, since 1999, West Nile Virus (WNV) has infected 36,801 people and has caused the deaths of 1,580. In California, since 2002, nearly 3,600 people have been infected with WNV with an additional 124 fatalities. Analyses of remotely- and spatially-based data have proven to facilitate the study of mosquito-borne diseases, including WNV. This study proposes an efficient procedure to identify swimming pools that may serve as potential mosquito habitat. The procedure derives the Normalized Difference Water Index (NDWI) from high resolution, multi-spectral imagery to detect the presence of surface water, and then incorporates vector-based data layers within a GIS to identify residential land parcels with detectable water. This study compared the parcels identified as having water (535) with parcels known to have swimming pools (682) resulting in an accuracy of 78.4%. Nineteen of the 147 land parcels with swimming pools had backyards with enough vegetation to obscure the presence of a swimming pool from the satellite. The remaining 128 parcels lacked enough surface water for the NDWI to indicate them as actually having surface water. It is likely then that swimming pools, associated with such parcels, may have enough water in them to provide adequate habitat for mosquitoes, and so field inspection by mosquito abatement personnel would be justified.