Super-Resolution Land Cover Mapping Based on the Convolutional Neural Network

Abstract

Super-resolution mapping (SRM) is used to obtain fine-scale land cover maps from coarse remote sensing images. Spatial attraction, geostatistics, and using prior geographic information are conventional approaches used to derive fine-scale land cover maps. As the convolutional neural network (CNN) has been shown to be effective in capturing the spatial characteristics of geographic objects and extrapolating calibrated methods to other study areas, it may be a useful approach to overcome limitations of current SRM methods. In this paper, a new SRM method based on the CNN ( SRM CNN ) is proposed and tested. Specifically, an encoder-decoder CNN is used to model the nonlinear relationship between coarse remote sensing images and fine-scale land cover maps. Two real-image experiments were conducted to analyze the effectiveness of the proposed method. The results demonstrate that the overall accuracy of the proposed SRM CNN method was 3% to 5% higher than that of two existing SRM methods. Moreover, the proposed SRM CNN method was validated by visualizing output features and analyzing the performance of different geographic objects.

Keywords

• super-resolution mapping
• land cover
• convolutional neural network
• remote sensing imagery