Study on Mechanism of Scale Effect on Measurement of Land Use Classification Area
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Based on the analysis of the scale effect on land use classification area of land use survey,this paper puts forward the calculation method of the areal difference of the same land types under different scales,so as to lay the theoretical basis for the further study of the areal difference of the current situation of large scale land use survey.Cite
A land use/cover classification system is important for land resource management and it is one of the key research issues in Land Use /Cover Change (LUCC) and land change science research. Lots of work has been done in this area, however, a universally-accepted classification system has not been available yet. This paper proposed several guidelines for building a land use/ cover classification system, which encompasses the basic concept of land use and land cover. Then a preliminary framework for Chinese land use/cover classification system at different scale based on remote sensing data was detailed. The framework is made up of four scales, including national scale, regional scale, county scale and country scale. The classes of first level at national scale in the system are agriculture land, woodland, natural grassland, built-up land, water, wetland and barren land. The regional scale includes 27 classes of land use/cover and the county scale includes 43 types. The general diagnostic criterion of the first level of classification system is the situation of existing vegetation, soil and water, artificial and natural surface. Monitoring on land resource in Beijing-around area as an example, this paper introduce the respects need to be paid attention of this classification system. Because of the complexity and difficulty of this question itself, this system was based on synthesis of relevant research achievement; its actual feasibility still remains to be verified.
Land Cover
Land information system
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Land use classification is the most basic issue in research on land use and affects directly science approach and practice of land use.Based on all_respect approach on theories and methods of land use classification,comparison about Chinese classification systems of land use with foreign systems of land use is carried out in this paper.The advantages and shortcomings in Chinese classification systems of land use are also compared with foreign land use classifications.Finally,the framework of multi_level and identical criterion system of land use classification is advanced.
Land information system
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In order to extract information of the Mathematical simulation model for the references of land useplanning decision, it analyzed the land use characteristics in shaoyang district of hunan province, then extracted cultivated land, construction land and rural residential land. Typical relation analysis method and spatial gridding Logistic regression analysis method were used to made quantitative analysis of these three types of driving forces and obtain the main influential driving forces for each land use.The results showed that it can provide scientific support for the formulation of the relevant policies ,the fitting degree of the spatial simulation was rather high(f construction land, rural residential land and cultivated land was 79.45%, 89.35%, 95.35% ), it showed that the model can provide theoretical foundation for the regulation of land-use behavior,also help promote efficient for land use fundamentally.
Cultivated land
Land Cover
Foundation (evidence)
Quantitative Analysis
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Land use classification is most basic issue to research on land use, affects directly science approach and practice of land use. Based on all respect approach on theories and methods of land use classification, comparison about Chinese classification systems of land use with foreign systems of land use is carried out in this paper. While advantages and shortcomings existed in Chinese classification systems of land use are also compared with foreign land use classifications. Finally, the framework of multi level and identical criterion system of land use classification is advanced.
Land information system
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The second land investigation are being implemented.1:10000 land use database is the important achievements for rural land investigation,we must carry out the gradient classification assignment of the land.However,the traditional human-computer interaction has led to a heavy workload and error-prone.Author analyzed the process of land classification assignment,proposed the use of Windows programming which is designed and implemented in MapGIS environment for automatic classification of cultivated land gradient value.This approach improves efficiency,but also avoids any errors in the artificial process.
Arable land
Land information system
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A land suitability assessment and land use control decision making support system used as a spatial analysis tool to Fuqing City was developed based on GIS which was an integration of comprehensive index model with parcel compactness model through creating geospatial database for land use distribution and land suitabi lity controlling factors. After multifactor spatial analysis on land suitability has been operated and land use suitabilities under the conditions of objective land uses of interest (especially for pan agricultural landuse such as cultivated land,forestry,orchard) have been simulated,the unique objective land use planning was proposed associated with current land use pattern in Fuqing;and the optimal multi objective land use planning scenario was presented through comprehensive comparison analysis on land use multi utilities. It was concluded that there is no more potential land in Fuqing for arable land,but about 340,100 and 50,000 acres are left for new forest and new orchard which can provide numerical parameters for creation of land use transformation and overall planning.
Arable land
Land information system
Agricultural land
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Land is an important social and economic resource. Knowing the spatial distribution of land use and the expected location of future land-use change is important to inform decision makers. This paper documents and validates the baseline land-use maps and the algorithm for spatial land-use change incorporated in the Land Use in Rural New Zealand model (LURNZ). At the time of writing, LURNZ is the only national-level land-use model of New Zealand. While developed for New Zealand, the model provides an intuitive algorithm that would be straightforward to apply to different locations and at different spatial resolutions. LURNZ is based on a heuristic model of dynamic land-use optimisation with conversion costs. It allocates land-use changes to each pixel using a combination of pixel probabilities in a deterministic algorithm and calibration to national-level changes. We simulate out of sample and compare to observed data. As a result of the model construction, we underestimate the “churn” in land use. We demonstrate that the algorithm assigns changes in land use to pixels that are similar in quality to the pixels where land-use changes are observed to occur. We also show that there is a strong positive relationship between observed territorial-authority-level dairy changes and simulated changes in dairy area.
Land information system
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Calculating and assessing available land(reserved construction land potential) is a key foundation of Major Function Oriented Regionalization.Under the background of land resources scarcity and the policy of cultivated land conservation,precisely evaluating land resources,especially reserved construction land of different regions seems to be one of important issues on how to put forward Major Function Oriented Regionalization.The article puts emphasis on definition,function,factor parameters,and arithmetic and technique course of available land for Major Function Oriented Regionalization.With the help of GIS spatial analysis techniques,using Digital Elevation Map(DEM),TM remote sensing land use map of 2000,administrative map at county level and land use investigation data of 2005,the article calculated and assessed quantity and spatial differentiation of available land of China in 2005.The results show that: available land area for construction in China amounts to 28.54×104 km2,which accounts for 3.01% of the total land area.Available land area per capita is 0.34 mu/person,and the main characteristics of spatial differentiation show that: the high value areas are concentrated in Northeast China,northern part of North China,Northwest China and the middle reaches of the Yellow River,while the low value areas are aggregated on the Qinghai-Tibet Plateau and densely populated areas of Central and Eastern China.Available land is a comprehensive index for assessing land capacity of population agglomeration,industrialization and urbanization in different regions.However,as a lot of factors are related to the index,one single index(available land area or available land area per capita) cannot precisely reflect all the contents of the index of available land.In the process of practical application,a few issues should be concerned.Firstly,available land index items consist of three factors: quantity,quality and scale of massing of reserved construction land.Available land area and available land area per capita are two key indices based on the single factor method.Secondly,supplementary indices should be set up,such as abundance of available land per capita,abundance of available land,and etc.Finally,according to the definition of the index,available land should be derived from residual available land,potential available land and adjusting available land.The location of the study area,work targets,scale of the study area and data accessibility should also be focused in the practical process of calculating and assessing available land.
Industrialisation
Urban agglomeration
Land information system
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