Land Use Based On 3s Technology Applied Research To Update The Survey

In recent years, with the faster development of economy,the land use status in Kunming Wuhua area has the greatly change,which leads to the conflict between the population and land use.In order to use the land reasonably and protect the cultivated land effectively,we must investigate clearly the land area,distributing and the utilization of every species of land.In the initial investigation, because of the relatively behindhand technical method and the change survey not to achieve consistent of the map,number and object every year,So, the accuracy and depth of the present database are not satisfied with the need of work.In order to make a thorough investigation on the area,distributing and utilization of very species of land . we make use of 3S technique which is able to improve the accurity of investigation greatly and achieve consistent of the map ,the number and the object.The integration of 3S technologyplays an leadship in the current spatial information technology development, which has the broad application prospectin the land management. This paper taking the Kunming Wuhua area as the object of study, integrating the 3S technology characteristics and the present land utilization, discusses the application of 3S technology in the land use change survey, and expatiates concretely the technology route of the land use change survey based on the 3S technology as well as technology achievement of 3S in detail.At first this paper makes an in-depth study on the remote sensing data (SPOT5 2.5 meters panchromatic image and over 10 meters spectral image) in the land use change survey: 1)Making a comparative analysis of the orthovideo control station choices ;2)Making analysis to the method of remote sensing image merge.And then, making an embedded study on the method of remote sensing classification :1)Making a particular expatiation to the classification of manual interpretation;2)To the remote sensing calculate classification,using the supervised/unsupervised method to achieve classification to the remote sensing image in the experience area,and making a comparative analysis on the classification result and field survey data.The next step, making an embedded study to the application of 3s technology in the land use change survey: 1)Making analysis to the application of difference GPS technology;2)Making an introduction of hand-held GPS application in the land use change survey,and making an accuracy analysis of hand-held GPS application in the recruit survey object.At last,making the data attained from the land use change survey saved in the database,and managing scientifically the data attained from the land use change survey using the software of the land utilization information...