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Leaf chlorophyll content is a key indicator of crop photosynthesis activity, which is correlated with leaf nitrogen concentration, and can serve nitrogen fertilizer decision-making. So it is of significant to estimate chlorophyll content for crop growth diagnosis. In this study, a new hyperspectral index was proposed to estimate leaf chlorophyll content in winter wheat. Hyperspectral reflectance data,...
Simulating, forecasting and displaying flood submergence range accurately and scientifically has important significance for flood control, flood fighting, flood assessment and disaster relief to provide decision support. This paper develops the Flood Submergence Analysis System using ArcEngine component library. The main functions of this system are as follows: generation of 3D terrain, display of...
Rice is one of the staple grains in China and has a strong relationship with annual accumulation temperature which has a potential effect on rice planting area. This study utilizes a model called SPAM (Spatial Allocation Model) to detect the rice spatial distribution change during the 1981–2010 under the climate change in the Northeast China Plain. The result shows that climate change plays an important...
The 3G technology brings a great increase of wireless data transmission capacity, makes it possible for mobile map services. The map service publishing method and data transmission rate directly affect the user experience effect. This paper has released different types and sizes of maps based on three environments, the simulator, TD-SCDMA and Wi-Fi, tested the time required for mobile map transmission,...
Accurate and reliable agricultural information is the basis of the implementation of digital agriculture. Currently, the processing of agricultural information collection and data acquisition is more complex. It urgently needs to develop a portable agricultural information collection system with high degree integration and a wide range of versatility. It can process information in "one-stop"...
This study makes use of 51 rain gauges in May, 2010 over Zhejiang as “true value” in order to validate the Tropical Rainfall Measuring Mission (TRMM) algorithm 3B42 in spatial-temporal scale based on the correlation coefficients and scatter points slope methods. In order to find the relationship between TRMM 3B42 and DEM, a three-polynomial-regression analysis was made with DEM as a dependent variable...
Establishment biomass monitoring methods of invasive species has an important instructive meaning for control and treatment of invasion, which was also beneficial to national ecological safety and social stability. This study researched the estimation methods of biomass of water hyacinth by hyperspectral remote sensing. The spectral reflectance characteristics were analyzed based on field experiments...
Soil surface roughness (SSR) is a critical variable for retrieving soil moisture using microwave remote sensing model. To quantify SSR, the data of soil surface microtopography (SSM) is needed. SSM is the micro elevation of soil surface. The methods of microtopography measurement mainly include the pin meter and profile meter, photography, laser scanning. A method of laser scanning is considered the...
Crop Growth Monitoring System (CGMS) was originally developed by European Union based on a crop growth model (WOFOST) with the goal of regional yield estimations for major crops. The CGMS, driven by the geographic information system and the crop growth model, is composed of three main components: weather monitoring, crop monitoring and crop yield forecasting. In this study, the CGMS is introduced...
Agriculture is the foundation industry of the national economy. The sustainable development of agriculture and rural social economy is the fundamental guaranty and priority field in the national development. However, the primary problem is how to assess the sustainable development capacity of agriculture and country. In many evaluation methods of the sustainable development, ecological footprint model...
Time series data of the China environment and disaster reduction satellite (HJ), TM images and improved Carnegie Ames Stanford Approach (CASA) model were used in this study to estimate cotton yield in 121groups Xinjiang province. we used CASA model to calculate the cotton net primary production (NPP),(NPP=(SOL ×FPAR×0.5)×ε). Finally, yield was estimated through converted the NPP to biomass, then cotton...
We developed an optimum image-fusion system to improve remote sensing precision of farmland fertility with interpretation-lattice. Specifically, we analyzed the image-fusion system implementation through information measures and modeling, and taken into account that the benefits of imagefusion are maximized and the risk of error farmland fertility recognition with remote sensing is minimized. We also...
With the establishment of marine monitoring network with an all-round of marine, land, air and space, the quality of marine data showed a trend of exponential growth from the GB, TB to PB. How to achieve high scalability, high reliability, high security and low-cost storage of massive marine data has become one of the key issues restricting the development of “digital ocean” and applications of marine...
China southwest region has suffered from three years of severe drought in the dry season from 2010 to 2012, with devastating impacts on agricultural productions. Previous agricultural cropping patterns were adjusted to adapt to drought. How to find evidences of agricultural adaption to drought? Here, we showed agriculture adaptation to drought stress according to the changes of vegetation greenness,...
Climate variability has been viewed as a prime field of interest among the environmental scientific communities, especially in the agriculture planning field. Variable climatic condition has a direct impact toward the agricultural productivity. This variability, especially change in temperature, could be due to the expansion of urbanization within the region. Rapid growth of urbanization due to population...
In order to evaluate the arable land change and ites pressure in coastal region of Jiangsu province, China. Land use change from 2006 to 2010 were analyzed based on TM imagery. With the help of the Statistical Yearbook, the pressure index of arable land in the region was calculated and the four partition were divided. The urbanization trend and the driving factors were also analyzed. That some countermeasures...
Remote sensing provides a way to identify paddy and measure the planting area with high efficiency. Particularly, the multi-temporal images show dominant advantages of extracting short-term spectral features of paddy. Traditional change detection methods usually try to derive exhaustive training dataset for classification which is not suitable for those applications that are interested on one specific...
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