Title :
Appropriate spatial resolution analysis based on land surface heterogeneity
Author :
Ma, Lingling ; Wang, Xinhong ; Li, Chuanrong ; Qiu, Shi
Author_Institution :
Acad. of Opto-Electron., Beijing, China
Abstract :
In order to meet the various demands of remote sensing applications, it is still worth being discussed that whether higher resolution is necessarily better. Actually, the spatial resolution should be carefully chosen according to application demands, for optimizing the balance of effectiveness and cost. In this paper the concept of “appropriate spatial resolution” is used, which should be the spatial scale with least data volume and most interested information, while not the highest precision of information. Characterization of spatial heterogeneity is the basis of analyzing spatial structure of the image under the given spatial resolution, and it is also the basis of selection of appropriate spatial resolution. Based on the wavelet variance method to characterize spatial heterogeneity, appropriate spatial resolutions of albedo, NDVI and surface radiation temperature on the same research area are given. Results show that appropriate spatial resolutions to various retrieved physical properties are different due to different grades of spatial heterogeneity. Proper scale range will be obtained to observe certain geographic quantity, by operation of the appropriate resolution selection.
Keywords :
geophysical techniques; remote sensing; albedo appropriate spatial resolution; geographic quantity; land surface heterogeneity; least data volume; remote sensing applications; spatial heterogeneity characterization; spatial resolution analysis; spatial scale; wavelet variance method; Land surface; Remote sensing; Spatial resolution; Surface waves; Wavelet analysis; Wavelet transforms; Appropriate spatial resolution; heterogeneity; remote sensing; spatial scale; wavelet variance;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6351544