Application of Spatial Sampling to Remote Sensing Monitoring of Forest Cover Area

Abstract:

This study combines the sampling technique, geographic information system and remote sensing technique to conduct a sampling survey on forest cover area of Jinggangshan National Nature Reserve in China on the basis of TM remote sensing image. The spatial simple random sampling, spatial stratified sampling and sandwich sampling model are respectively utilized to establish the sampling design. For the spatial simple random sampling model, the spatial autocorrelation analysis method is adopted to determine the spatial autocorrelation coefficient through calculating Moran's I index, while in the spatial stratified sampling and sandwich sampling model, the yearly maximum NDVI (Normalized Difference Vegetation Index) is utilized to conduct the spatial stratification. Through comparison of the sampling accuracy of three sampling models, a higher precision and more reasonable sampling method and sampling model is provided for remote sensing monitoring of forest cover area. The study results show that: sandwich sampling model is featured as the highest sampling accuracy, followed by the spatial stratified sampling and simple random sampling. Under the requirement of same precision, sandwich spatial sampling model can reduce quantity of the sampling points, and create all kinds of report units according to demands of different spatial area, so it is featured as the better suitability.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 3732-3737
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.3732
• Online since: December 2012
• Authors: Ji Ping Zhang, Lin Bo Zhang, Bin Gong
• Keywords: Forest Cover Area, Sandwich Sampling Model, Spatial Simple Random Sampling, Spatial Stratified Sampling

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