Abstract To improve the quality and accuracy of digital image mapping,different methods are under exploration. This paper analyses and studies regional parameters of information sources mapped and digital image recognition pattern combined with remote sensing thematic mapping on the base of geographic knowledge and theory from pointview of geography.The paper,based on digital image mapping objectives.analyses and investigates the phenological data and optimization temporal image of wheat according to geographic aod biochemistic theories in digital image recognition mapping.Meanwhile,analysis,determination and quantitation of regional parameters are also carried out combined with alkali-saline soil recognition mapping