Search Results - WANG Ren-chao

To counter the confusion on land classification, combined with author's research achievement and work experience, the theory of land classification system that are comprised of land natural classification and land resources classification and landuse classification is put forward based on the e...

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In order to detect the cropland changes and its drivers in Zhejiang Province coastal region, TM and ETM + images in 1985, 1993 and 2001 were used. A stratified unsupervised classification technique in conjunction with visual interpretation was performed, and an overall classification accuracy of 85%...

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The works of developing and application of general land use planning in China were briefly reviewed. The role and importance of general land use planning in sustainable development were analyzed, and the main difficulties were discussed. The developing and application basis of general land use plann...

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Red soil is a very important soil resource in southern parts of China. But being existing simultaneously of enormous productive potentialities and severe soil degradation it needs harnessing urgently. Red Soils Resource Information System (RSRIS) of Zhejiang province (1∶500 000), Quzhou city (1∶250...

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Vegetation remote sensing data plays an important role in monitoring dynamically earth resource from the space. In this paper, the application of vegetation remote sensing in detecting the vegetation growth state, estimating the canopy biochemical characteristics and productivity of crop from vegeta...

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In order to meet the actual demands for managing land resource, a new GIS-based land use management decision support system is explored. This paper introduces county land use management decision support system (CLUMDSS) which we have developed. CLUMDSS consists of spatial database, attribute databas...

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From the characters of yield estimation by remote sensing, based on analyzing the natural conditions of Zhejiang province, division index in which planting system is the main one are determined. The regionalization of rice yield estimation by remote sensing in Zhejiang province is studied by space n...

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Relative radiometric normalization (RRN) minimized radiometric differences among images caused by inconsistencies of acquisition conditions (such as weather, season, sensor, etc.) rather than change in surface reflectance. Five methods of RRN, i. e. image regression (IR), pseudo-invariant features (...

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This experiment was carried out on quartnary hilly red clayey soil. By measurement of soil water-physical characters and principal soil physical-chemical properties, soil water-holding capacity, soil water release characters and soil water conductivity were analyzed. The results showed that with inc...

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The basic contents and types of environment quality assessment, the application of “3S” technology in environment quality assessment and disadvantage of the application were remarked in detail. Finally, the paper disscussed the way and studied fields of the further application of “3S” technique in e...

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Significant advance in the application of remote sensing and geographic information system (GIS) to assessing and solving soil and water conservation problems have been taken place over the last 10 years. This paper describes the procedures employed to integrate remote sensing and GIS techniques in...

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As a case study of agricultural hi-tech demonstration zone in Shaoxin County of Zhejiang Province, ASP and JAVA/JavaScript/VBScript are introduced in this paper to integrate models of fertilizer recommendation for paddy with ArcIMS 4.01 WebGIS effectively, and map-based fertilizer recommendation in...

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Based on “On construction of agricultural information system engineering”, the discipline bases of agricultural information engineering system included science background, technology background and application background were discussed in detail. The agricultural information science was defined and...

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Percent ground cover of vegetation is an important parameter for crop management. An innovational method based on features of objects was presented to automatically estimate percent ground cover of winter wheat from digital image analyses. Based on the features of wheat and its background components...

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It was pointed out in this paper that accurate geometric correction is the presupposition of rice growth monitoring and yield estimation using NOAA/AVHRR data at province level, therefore it is necessary to select an accurate geometric correction method which should be easy to use for non-profession...

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The canopy spectra of rice under different nitrogen levels were studied. Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude and area of the red edge peak) were studied to evaluate rice leaf chlorophyll, LAI etc. Red edge positions move to longer wave bands till...

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This paper discusses the dynamics of vegetation canopies reflectance with view zenith angles and vegetation canopies structure. The results show that: ① vegetation canopy reflectance increases with increasing off-nadir view angle for all azimuth directions. For a sparse canopy, the backscattering ch...

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The rice samples came from two experimental designs with different condition. From those samples the most upper expanded fully leaf and the third one were selected to measure leaf spectral reflectance using FieldSpec FR (350-2500 nm). Differences of leaf spectral reflectance among three N levels wer...

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This paper introduced the methodology of early rice planted area estimation by integration of GIS and TM data. The methodology enhanced the classification precision of TM image in both plain and mountainous areas. Land-use and town boundary maps were digitized and transferred to raster format and op...

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High spatial resolution remote sensing images such as satellite image and airborne image are much widely used in agriculture, forestry recourses inventory and the mountain ecology monitoring area. However, the shades in image caused by terrain and the sensor side view scanning impact the application...

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