In land use status quo investigation and dynamic monitoring of land use, the main use of GIS, remote sensing and control of land utilization in modern science and technology, especially the urban construction land and the cultivated land utilization, this scheme is mainly make full use of "3 s" technology and ground investigation and the computer network communication technology, to establish the national land use remote sensing dynamic monitoring system, the implementation of key areas, specific target fast monitoring of land use status, for the comprehensive management, law enforcement inspection, the implementation of general land use planning, farmland protection, providing services, such as land comprehensive improvement situation in dynamic monitoring of land use present situation and the main work is based on the monitoring of the land use remote sensing images and other relevant data for processing, using the way of man-computer interactive interpretation to obtain the land use status and dynamic change information,
2. The present situation of land use remote sensing monitoring
According to the different application requirements, making the land use data of different scale (usually in the form of 1:100000, 1:50000, 1:1 million, etc.), the scheme on the basis of the implementation of land use remote sensing monitoring, formulate the reasonable technical route (figure 1),
2.1 data processing
In remote sensing image data according to the different requirements in terms of topographic map to correct and registration, make the same area, different types of spatial resolution satellite data to geographic coordinates and the pixel match, at the same time, the approach of image fusion, meet the application requirements,
2.2 man-computer interactive interpretation
After the image processing on the basis of the interpretation extracted land use information by way of man-computer interactive interpretation,
2.3 the field verification and results summary
Through the actual field verification to confirm and correction of interpretation of land use information, according to the results of the image interpretation and field investigation to obtain land use map and statistics of type, position, range and area information, and make maps,
3. The land use change information extraction
Land use change information that is in the process of land use change the surface nature of information, including agricultural land into construction land, urban expansion of cultivated and non-cultivated land categories, such as
In constructing the demand scale of land use/land cover in the process of database of special topics, man-machine interactive interpretation directly build the GIS platform (hereinafter referred to as artificial interpretation) as the core of Chinese land use remote sensing mapping technology solutions, at the same time, based on remote sensing monitoring of land use/land cover (" national land classification "(standard) 2002) classification system, form a standard, consistent interpretation so as to ensure the accuracy of remote sensing of artificial interpretation, on the basis of to obtain land use status data, through two direct comparison and analysis of remote sensing image, the classification of land use change sentence (i.e., direct interpretation dynamic plaques) and" figure spot division "of the way of land use dynamic information is extracted (mainly using difference, transformation and fusion, image processing technologies such as the change of partial emerge from the background image), further forms of land use dynamic variation spot, and qualitatively and integration, the chart in 2005 and 2010, for example, extract the dynamic information of land use,
4. The main achievements
4.1 achievements of remote sensing image
GIS as the platform, the use of different scale topographic map, the demand regions of different remote sensing data sources to image processing, processing mainly include radiation correction, geometric correction, fusion, Mosaic and so on,
4.2 the land use maps achievement
Using man-computer interactive interpretation combined with field survey on the way to obtain land use status data and dynamic graph spot,
4.3 data statistics results
Summary area of administrative division of land use types,
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