| As the important strategic resources and material things for society economical and cultural sustainable development, the tidal wetland at Yangtze River estuary in Shanghai is also considered to be a significant part in eco-security system. Its giant resource potential and environment, economy and ecological functional value determine that it is necessary to rationally and scientifically exploit, utilize, protect and maintain this tidal wetland. Among those complex wetland research, the primary and crucial thing is entirely understand, insight and mapping quality and quantity distribution and variation of all kinds of wetland resource from spatial view, which including land-use, vegetation type, Aves, benthos, hydrology, soil and so on. Moreover, the remote sensing and GIS technology have been proved to be an effective and preferred approach to settle a particular geographic problem especially in mapping and visualizing.Remote sensing and GIS technology, which begun from last century and has been widely using in various aspects, and even now are being involved with resource, environment, ecological and information system development for tidal wetland. There are some tidal wetland applications benefited from remote sensing and GIS technology, which include investigation of resource, monitoring resource and environment dynamical change; remote sensing on wet biomass evaluation; resource and environment geo-analysis and assessment; geo-information software system development for decision-making. how to suitably and rationally using remote sensing to conveniently, quickly and precisely acquire important tidal wetland information depends on the general principal, reasonable technical practice and flexible application of varied skills and methods. And object-oriented principal is a critical and popular theory among those theories and methods people often used before.The essential of object oriented theory is identifying reality object, then building an object-oriented model followed by its internal characteristics, and simulating the structure and behavior of the real world's object, from which the process emphasis on the people's general logical thinking and principles. Based on the object oriented theory, this paper elaborates the remote sensing and GIS application on investigating and monitoring the resource and environment of tidal wetland in shanghai. The result shows that: following on object-oriented thinking and theory, the use remote sensing and GIS method for investigating, analyzing and managing on tidal wetland resource and its environment prove to be effectively and quickly way to get and analyze the resource of tidal wetland and the environmental data; the object-oriented method also could effectively build resource environment information service platform; it is obviously and remarkably optimize and broaden current tidal wetland remote sensing and GIS approach and application, which in turn theoretically and practically enlarge and enhance remote sensing and GIS application principle.Object-oriented tidal wetland remote sensing and GIS technology's application can be divided into the following sections. Section I describes the object-oriented knowledge and identification on tidal wetland, establishing its structure and boundary, and analyzing tidal wetland object's problem from different levels, as formulating a clear target for remote sensing and GIS application. Section II elaborates the procedure of practical application on wetland according to basic knowledge of tidal wetland, which is following Question-Aim-Case Selection-Analysis-Reality steps. And also gives a specific approach for remote sensing and GIS technology. How to build up tidal wetland geo-database is available in section III, which also particularly explains the method of picking up tidal wetland remote information and does some research on remote sensing data analyzing, object's image creation, and object space semantic network building and identification on object-image. Based on knowledge and method mentioned above, section IV selects the coastline erosion and accretion in Yangtze River, the alternate investigation of tidal wetland resource and the tidal vegetation analysis as examples to utilize and carry out object-oriented remote sensing and GIS technology in image pre-processing, image segmentation, image object hierarchical network building and image classification. The last section concerns how to build up an integral tidal wetland geographic information system which including the object oriented software analyses, design, development, deployment and maintenance.There are two primary innovative ideas in this study. The first one is the approach of how object oriented theory synthetic to remote sensing and GIS method for investigation, monitoring on tidal wetland resource and environmental situation, of which mainly focuses on analyzing varied tidal wetland based on object-oriented, geographically expressing and building model according to tidal wetland object data, quickly and precisely acquiring and extracting tidal wetland information. The other one is the development of tidal wetland resource and environment geographic information system which involving object-oriented theory to system analyses, design, code, debug and maintain. The systems are service-based information system and have some characteristics featured as simple, systematic, developed, expanding and seamless. Deployment of this tidal wetland geographic information system provides a platform for decision-making and scientific management of resource and environment for all policy-making, supervisor, mangers and researchers, who closely associated with tidal wetland in Shanghai.
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