Approximate representation of thep-norm distribution

［1］Liu D J,Shi W Z,Tong X H,et al.Precision analysis and quality cont rol of GIS spatial data.Shanghai:Shanghai Publishing House of Scientific Documen ts,1999 ［2］Chen X R,Fang Z B,Li G Y,et al.Non_parameter statistics.S hanghai:Shanghai Publishing House of Science and Technology,1989 ［3］Li Q H,Tao B Z.Application of probability statistical theory in survey ing.Beijing:Beijing Publishing House of Surveying and Mapping,1982 ［4］Sun H Y.p_norm distribution theory and its application in surveyin g data processing:[Ph.D Thesis].Wuhan:Wuhan Technical University of Surveying and Mapping,1995     

Seminar on the Wang Zhizhuo''''s Aeademie Thinking and Digital Photogrammetry will be Held in Wuhan

Seminar on the Wang Zhizhuo's academic thinking and digital photogrammetry organized by the Wuhan Technical University of Surveying and Mapping(WTUSM)and Commission of Photogrammetry and Remote Sensing, Chinese Society of Surveying and Mapping(CSSM)and will be held in Wuhan, Dec. 11—17, 1988, just on the 80th     

Enhancing group resolution of TM6 based on multi-variate regression model and semi-variogram function

［1］Castleman K R.Digital image processing.Englewood Cliffs,NJ:Prentice Hall,1996 ［2］Carr J R,Miranda F P.Spectral and texture classification of single and multiple band images.Computers & Geosciences,1996,22(8):849～865 ［3］Chen S P,Zhen W.Conciseness of remote sensing mineral resources exploration.Science and Technology Publishing House,1994(in Chinese) ［4］Costanitini M,Farina A,Zirilli F.The fusion of different resolution of SAR images.Proceeding of IEEE,1997,85(1):139～146 ［5］Dong Q,Fang H L.The use of variogram in remotely sensed images.Journal of Remote Sensing and Application,1997,12(1):7～13(in Chinese) ［6］De Jong S M,Burrongh P A.A fractal approach to the classification of Mediterranean vegetation types in remotely sensed images.PE & RS,1995(61):1 041～1 053 ［7］Fang H L,Qian G H.Fusion of ADEOS-AVNIR panchromatic and multispectral image data using principle component analysis.Journal of Remote Sensing and Application,1998,13(3):48～53(in Chinese) ［8］Franklin S E,Wulder M A,Lavigne M B.Automated derivation of geographic window size for use in remote sensing digital image texture analysis.Computers & Geosciences,1996,22(6):665～673 ［9］He J G,Zhu C G.Methods for data fusion between satellite-boarded SAR and multi-satellite remote sensing.Journal of Earth-science Information,1997 (16):29～33(in Chinese) ［10］Jia Y H.A data fusion method for spatial resolution enhancement of remotely sensed multi-spectral images.Journal of Remote Sensing and Application,1997,12(1):19～33(in Chinese) ［11］Jin G L,Qiu Z C.A research on information amount of multi-spectral images.Acta Geodaetica et Cartographica Sinica,1992,21(2):101～107(in Chinese) ［12］Kang Y H.Theories of data fusion.Xi‘an:Xi‘an Electronic University Press,1997(in Chinese) ［13］Li H,et al. Multi-sensor image fusion using the wavelet transform.Graphical Models and Image Processing,1995,27(3):235～244 ［14］Liu J G.Digital image processing of remotely sensed imagery data.Imperial College of Science,Technology and Medicine,1997 ［15］Liu J G,McM J.Moore:Pixel block intensity modulation: adding spatial detail to TM band 6 thermal imagery.Int.J.Remote sensing,1998,19(13):2 477～2 491 ［16］Lou Z,Zhu C G.Multi-variate statistics fusion of TM images.Journal of Aero-computational Technology,1998,28(3):40～42(in Chinese) ［17］Peng W N.Statistical methods for geo-data processing.Wuhan:Wuhan College of Geology,1983(in Chinese) ［18］Richard J R.Remote sensing digital image processing.an introduction,Berlin:Springer-Verlag,1999 ［19］Wang R S.Image understanding.Changsha:National Defense University Press,1995(in Chinese) ［20］Winkler G.Image analysis.Random Fields and Dynamic Monte Carlo Methods (A Mathematical Introduction),Berlin:Springer-Verlag,1995     

Approximate approaches to geometric corrections of high resolution satellite imagery

The exploitation of different non-rigorous mathematical models as opposed to the satellite rigorous models is discussed for geometric corrections and topographic/thematic maps production of high-resolution satellite imagery (HRSI). Furthermore, this paper focuses on the effects of the number of GCPs and the terrain elevation difference within the area covered by the images on the obtained ground points accuracy. From the research, it is obviously found that non-rigorous orientation and triangulation models can be used successfully in most cases for 2D rectification and 3D ground points determination without a camera model or the satellite ephemeris data. In addition, the accuracy up to the sub-pixel level in plane and about one pixel in elevation can be achieved with a modest number of GCPs.     

About the International GIS Workshop on Antarctic King George Island

With rapid scientific development and further exploration towards the nature, the human kind hopes to serve themselves by mastering the natural law. Countries all over the world set much value on the study of Antarctica and have obtained plenty and substantial achievements. So as to strengthen mutual understanding among the countries in Antarctic surveying and mapping and share the achievements, the “International GIS Workshop on Antarctic King George Island“, Wuhan, July 6th～7th, 2000 was successfully held in the Lecture Hall of the National Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS). It was jointly held by the National Research Center on Antarctic Surveying and Mapping and LIESMARS, and sponsored by the National Polar Region Inspection Office, National Natural Scientific Foundation Committee, the State Bureau of Surveying and Mapping, the former Wuhan Technical University of Surveying and Mapping.……     

Algorithm for generating dem based on cone

Digital elevation model (DEM) has a variety of applications in GIS and CAD.It is the basic model for generating three-dimensional terrain feature.Generally speaking,there are two methods for building DEM.One is based upon the digital terrain model of discrete points,and is characterized by fast speed and low precision.The other is based upon triangular digital terrain model,and slow speed and high precision are the features of the method.Combining the advantages of the two methods,an algorithm for generating DEM with discrete points is presented in this paper.When interpolating elevation,this method can create a triangle which includes interpolating point and the elevation of the interpolating point can be obtained from the triangle.The method has the advantage of fast speed,high precision and less memory.     

LD2000 System with 3S and Multi—sensor

This paper introduces a car-borne road information collecting and updating system (LD2000) developed by Wuhan Technical University of Surveying and Mapping.This system is capable of collecting road network information and creating digital road network effectively by means of GPS,GIS and multi-sensor integration.The design and development of LD 2000 system are also presented in this paper.     

A vector-based method for the extraction of catchment from grid DEMs

The methodology of catchment extraction especially from regular grid digital elevation models (DEMs) is briefly reviewed. Then an efficient algorithm, which combines vector process and traditional neighbourhood raster process, is designed for extracting the catchments and subcatchments from depressionless DEMs. The catchment area of each river in the grid DEM data is identified and delineated, then is divided into subcatchments as required. Compared to traditional processes, this method for identifying catchments focuses on the boundaries instead of the area inside the catchments and avoids the boundary intersection phenomena. Last, the algorithm is tested with a set of DEMs of different sizes, and the result proves that the computation efficiency and accuracy are better than existent methods.     

An oracle-based data management method for large database in CyberCity GIS

An Oracle8i-based approach is proposed to manage the integrated databases of large CyberCity. This approach consists of threeschemes: ① a special R -tree index is designed to accelerate spatial retrieving, in which the bounding boxes of local regions have no intersection and all leaf nodes of the R -tree (geometry records ) have no repetitiont;② different data compression algorithms are adopted to compress the digital elevation models, 3D vector models and images, such as LZ77 lossless compression algorithm for compression of vector data and JPEG compression algorithms for texture images;③ in order to communicate with Oracle8i database, a CyberCity GIS spatial database engine (SDE) is designed. On the basis of this SDE prototype a case study is done.     

Announcement

In order to meet the requirements of the newly-founded Wuhan University to have uniform administration over the journals.Geo-spatial Information Science (Quarterly) takes some changes as follows. 　　1.The sponsor,formerly being Wuhan Technical University of Surveying and Mapping,is now Wuhan University. 　　2.The department in charge,formerly being the State Bureau of Surveying and Mapping,now is Ministry of Education. 　　3.The Periodicals Press of Wuhan Technical University of Surveying and Mapping is changed into Wuhan University Journals Press. 　　The principle,content,stylistic rules and layout,and service range of the Journal keep unchanged.We shall distribute the Geo-spatial Information Science to those who subscribe in 2001.     

Quality assessment of attribute data in GIS based on simple random sampling

On the basis of the principles of simple random sampling,the statistical model of rate of disfigure-ment(RD)is put forward and described in detail.According to the definition of simple random sampling for the attribute data in GIS,the mean and variance of the RD are deduced as the characteristic value of the statistical model in order to explain the feasibility of the accuracy measurement of the attribute data in GIS by using the RD.Moreover,on the basis of the mean and variance of the RD,the quality assessment method for attribute data of vector maps during the data collecting is discussed.The RD spread graph is also drawn to see whether the quality of the attribute data is under control.The RD model can synthetically judge the quality of attribute data,which is different from other measurement coefficients that only discuss accuracy of classification.     

GPS动态定位数据处理模型的比较研究 (英文)

The characteristics of three GPS kinematic data processing models, Least Squares （LS）, Kalman filtering and filtering are discussed and their advantages and disadvantages are compared. With observational data and pertinent data processing software, the applicable condition, context and effect of the three models are experimented. Results show that when the mobile platform is in uniform motion, the accuracy of the three models are almost equal; when the mobile platform is in stochastic acceleration, the accuracy of H∞ filtering model is superior to that of LS, while that of Kalman filtering is the worst.     

Optimized Triangulation Algorithm in Terrain Modeling

3D reconstruction of terrain model based on digital line graphics (DLG) is discussed. An auto-coupling triangles algo-rithm based on triangle topological relationship is put forward, and the topological data model of complicated terrain is developed. Based on this data model, automatic 3D topological reconstruction of terrain is realized.     

A COM-based Framework for Management, Analysis and Visualization of Large Scope Digital Elevation Models

This paper presents a component object model (COM) based framework for managing, analyzing and visualizing massive multi-scale digital elevation models (DEMs). The framework consists of a data manage-ment component (DMC), which is based on RDBMS/ORDBMS, a data a-nalysis component (DAC) and a data render component (DRC). DMC can manage massive multi-scale data ex-pressed at various reference frames within a pyramid database and can support fast access to data at variable resolution. DAC integrates many use-ful applied analytic functions whose re-sults can be overlaid with the 3D scene rendered by DRC. DRC provides view-dependent data paging with the sup-port of the underlying DMC and or-ganizes the potential visible data at dif-ferent levels into rendering.     

A GIS-based glacier inventory for the Antarctic Peninsula and the South Shetland Islands —A first case study on King George Island

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Natural Science,1997,1(6) ［11］Jones P D.Antarctic temperatures over the present century——a study of the early expedition record.Journal of Climate,1990,3:1 193～1 203 ［12］Kieffer H and 41 others.New eyes from the skye measure glaciers and ice sheets.EOS,2000,81(24):265,270～271 ［13］King J C.Recent climate variability in the vicinity of the Antarctic Peninsula.International Journal of Climatology,1994,14:357～369 ［14］King J C,Harangozo S A.Climate change in the western Antarctic Peninsula since 1945: observations and possible causes.Annals of Glaciology,1998,27:571～575 ［15］Klser H,Arntz W E.RASCAL (RESEARCH on Antarctic Shallow Coastal and Litoral systems).Untersuchungen zur Struktur und Dynamik eines antarktischen Küstenjosystems.Polarforschung,1994,64(1):27～41 ［16］Klser H,Ferreyra G,Schloss I,et al.Hydrography of Potter Cove,a small fjord_like inlet in King George Island,South Shetands.Estuarine,Coastal and Shelf Science,1994,38：523～537 ［17］Lucchitta B K,Rosanova C E.Retreat of northern margins of George VI and Wilkins Ice Shelves,Antarctic Peninsula.Annals of Glaciology,1998,27：41～46 ［18］Morris E M.Surface ablation rates on Moraine Corrie Glacier,Antarctica.Global and Planetary Change,1999,22：221～231 ［19］Park B K,Chang S K,Yoon H I,et al.Recent retreat of ice cliffs,King George Island,South Shetland Islands,Antarctic Peninsula.Annals of Glaciology,1998,27：633～635 ［20］Rakusa_Suszczewski S.The maritime Antarctic coastal ecosystem of Admiralty Bay.Department of Antarctic Biology,Polish Academy of Sciences,Warsaw,1993.216 ［21］Rakusa_Suszczewski S.The hydrography of Admiralty Bay and its inlets,coves and lagoons (King George Island,Antarctica).Polish Polar Research,1995,16(1/2):61～70 ［22］Rau F,Braun M,Saurer H,et al.Multi_year snow cover dynamics on the Antarctic Peninsula using SAR imagery.Polarforschung,2000,67(1/2)：27～40 ［23］Rott H,Skvarca P,Nagler T.Rapid Collapse of northern Larsen Ice Shelf,Antarctica.Science,1996,271:788～792 ［24］Rott H,Rack W,Nagler T,et al.Climatically induced retreat and collapse of northern Larsen Ice Shelf,Antarctic Peninsula.Annals of Glaciology,1998,27:86～92 ［25］Skvarca P,Rack W,Rott H,et al.Evidence of recent climatic warming on the eastern Antarctic Penisnula.Annals of Glaciology,1998,27:628～932 ［26］Simes J C,Bremer U F,Aquino F E,et al.Morphology and variations of glacial drainage basins in the King George Island ice field,Antarctica.Annals of Glaciology,1999,29:220～224 ［27］Smith A M,Vaughan D G,Doake C S M,et al.Surface lowering of the ice ramp at Rothera Point,Antarctic Peninsula,in response to regional climate change.Annals of Glaciology,1998,27:113～118 ［28］Smith R C,Stammerjohn S E,Baker K S.Surface air temperature variations in the western Antarctic Peninsula region.Antarctic Research Series,1996,70:105～121 ［29］Splettstoesser J.Antarctic Global Warming? 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Welcome to Order Wuhan University Academic Periodicals of Surveying and Mapping

1. Geomatics and Information Science of Wuhan University (Monthly), an academic periodical originated from Journal of Wuhan Technical University of Surveying and Mapping, aims at extending international academic exchanges of advanced research results in surveying and mapping. It covers the aspects of Photogrammetry, geodesy, physical geodesy, engineering surveying, cartography, Graphics, Geodynamics, GIS, GPS, remote sensing, etc. In addition     

Numerical prediction methods for clock deviation based on two-way satellite time and frequency transfer data

Three functional models, polynomial, spectral analysis, and modified AR model, are studied and compared in fitting and predicting clock deviation based on the data sequence derived from two-way satellite time and frequency transfer. A robust equivalent weight is applied, which controls the significant influence of outlying observations. Some conclusions show that the prediction precision of robust estimation is better than that of LS. The prediction precision calculated from smoothed observations is higher than that calculated from sampling observations. As a count of the obvious period variations in the clock deviation sequence, the predicted values of polynomial model are implausible. The prediction precision of spectral analysis model is very low, but the principal periods can be determined. The prediction RMS of 6-hour extrapolation interval is Ins or so, when modified AR model is used.     

A case study of using external DEM in InSAR DEM generation

Synthetic aperture radar interferometry (InSAR) has been used as an innovative technique for digital elevation model (DEM) and topographic map generation. In this paper, external DEMs are used for InSAR DEM generation to reduce the errors in data processing. The DEMs generated from repeat-pass InSAR are compared. For steep slopes and severe changes in topography, phase unwrapping quality can be improved by subtracting the phase calculated from an external DEM. It is affirmative that the absolute height accuracy of the InSAR DEM is improved by using external DEM. The data processing was undertaken without the use of ground control points and other manual operation.     

Numerical study on the mixed model in the GOCE polar gap problem

Gravity gradients acquired by the Gravity field and steady-state Ocean Circulation Explorer(GOCE) do not cover the entire earth because of its sun-synchronous orbit leaving data gaps with a radius of about 6.5° in the polar regions.Previous studies showed that the loss of data in the polar regions deteriorates the accuracy of the low order(or near zonal) coefficients of the earth gravity model,which is the so-called polar gap problem in geodesy.In order to find a stable solution for the earth gravity model from the GOCE gravity gradients,three models,i.e.the Gauss-Markov model,light constraint model and the mixed model,are compared and evaluated numerically with the gravity gradient simulated with the EGM2008.The comparison shows that the Best Linear Uniformly Unbiased Estimation(BLUUE) estimator of the mixed model can solve the polar gap problem as effectively as the light constraint model;furthermore,the mixed model is more rigorous in dealing with the supplementary information and leads to a better accuracy in determining the global geoid.     

最新国外测绘文献题录

[1]Fedae K.ISO/TC 211 地理信息与地球信息学框架参考模型=ISO/TC 211 Geographic Information and Geomatics-A Framework and Reference Model.International Archives of Photogrammetry and Remote Sensing, Vol.33, B2, 2000. 7.13-16:Amsterdam:192～196 [2]Gong Jianya.组织和管理分布式地理信息=Organizing and Managing of Distributed Geographical Information.International Archives of Photogrmmetry and Remote Sensing,Vol.33,B2,2000.7.16-23:Amsterdam:220～226 [3]EhlerM.集成地理信息系统:从数据综合到集成分析=Integrated Grographic Information System:Data Integration to Integrated Analysis.International Archives of Photogrammetry and Remote Sensing,Vol.33,B6,2000.7.13-16:Amsterdam:172～178 [4]Dasgupta A.国家(自然)资源信息系统=The National( Natural)Resources Information System.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2, 2000.7.13-16:Amsterdam:131～138 [5]Holland D.关于英国地形数据的全国数字化框架=A Digital National Framework for Topographic Data in Great Britain.International Archives of Photogrammetry and Remote Sensing,Vol,33,B2,2000.7.16-23:Amsterdam:303～308 [6].适合海道测量的最佳多波束回声测深仪=Towards Adequate Multibeam Echosounders.The International Hydrographic Bureau.The International Hydrographic Review,2000(1):67～80 [7]俄罗斯国家导航与海道测量研究所简介=Introduction of Gos. NINGI.Information Letter of Gos. NINGI, MOD:2001,5 [8]机载激光测深仪(LADS)=Airborne Laser Sounder.Journal of Hydrographic Surveying.-2001(4):14～20 [9]Vassilia K.GIS和遥感在发展中国家城市土地利用谈判中的应用=The Contribution of GIS and Remote Sensing in Urban Land Use Negotiation in Developing Countries.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/2,2000.7.13-16:Amsterdam:646～653 [10]Alexander K.GIS技术用于研究和监测格陵兰冰层=Studying and Monitoring the Greenland Ice Sheet Using GIS Techniques.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/2,2000.7.13-16:Amsterdam:678～685 [11]Efim K.高分辨率卫星数据用于评估小麦作物的生产率参数=Estimation on the Productivity Parameters on Wheat Crops Using High Resolution Satellite Data.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/2,2000.7.13-16:Amsterdam:717～722 [12]Franz K.轨道遥感数据和地学处理技术用于城市可持续性研究=Urban Sustainability Using Orbital Remote Sensing Data and Geoprocessing Techniques.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/2,2000.7.13-16:Amsterdam:728～732 [13]Gulch E.关于制图要素自动化提取的数字系统=Digital Systems for Automated Cartographic Feature Extraction.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:241～256 [14]Allan L.陆军测量局数字摄影测量及其发展=Digital Photogrammetry,Developments at Ordnance Survey.International Archices of Photogrammetry and Remote Sensing,Vol,33,B2,2000.7.16-23:Amsterdam:46～51 [15]Habib A.解决摄影测量中匹配问题的新方法=New Approach to Solving Matching Problems in Photogrammetry.International Archives of Photogrammetry and Remote Sensing ,Vol.33,B2,2000.7.16-23:Amsterdam:257～264 [16]Hild H.影像-地图自动化配准方法=A Strategy for Automatic Image to Map Registration.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:287～294 [17]Mckeown D M.自动化特征提取的性能评价=Performance Evaluation for Automatic Feature Extraction.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:379～394 [18]Raizman Y.以色列国家GIS数据库的三维数字摄影测量更新=Three-dimensional Digital Photogrammetric Update of Israeli National GIS Data Base.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.16-23:Amsterdam:443～448 [19]Saleh R.软拷贝摄影测量生产的成本与利润=The Cost and Benefits of Softcopy Photogrammetric Production.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:476～481 [20]Straub B M.图像自动化判读用于GIS更新=Towards the Automatic Interpretation of Images for GIS Update.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:525～532 [21]Mikhail E M….多源特征提取与城市环境可视化=Multi-source Feature Extraction and Visualization in Urban Environments.International Archives of Photogrammetry and Remote Sensing, Vol.33, B3/2,2000.7.16-23:Amsterdam:592～607 [22]Niederst M….精密摄影测量目标重建的通用数学模型=Generalized Mathematical Model of Precise Photogrammetry Reconstruction of the Objects.International Archives of Photogrammetry and Remote Sensing, Vol.33, B3/2,2000.7.16-23:Amsterdam:635～642 [23]Shan J….利用GIS数据的影像自动定向=Automatic Image Orientation by Using GIS Data.International Archives of Photogrammetry and Remote Sensing, Vol.33,B3/2,2000.7.16-23:Amsterdam:831～836 [24]Scaioni M.航空三角测量自动化系统的概念与测试=Concept and Testing of an Automatic System for Aerial Triangulation.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.16-23:Amsterdam:486～493 [25]Murai S.利用INS与GPS的集成系统开发机载三线扫描仪分析车速分布=The Development of Airborne Three Line Scanner with High Accuracy INS and GPS for Analysing Car Velocity Distribution.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:416～421 [26]Rajendram S.基于GIS的一体化土地利用/覆盖变化模型用于研究人与土地的相互关系=A GIS Based Integrated Land Use/Cover Change Model to Study Human-land Interactions.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/3,2000.7.13-16:Amsterdam:1212～1219 [27]Shi Zhongchao.GIS数据库修测:问题与解法=GIS Database Revision-The Problems and Solutions.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.13-16:Amsterdam:494～501 [28]Quadros C J.农业生产率的空间模拟:印度农业生态系统研究=National Level Spatial Modeling of Agricultural Productivity:Study of Flooded Agroecosystem.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/3,2000.7.13-16:Amsterdam:1191～1198 [29]Wang Mi.研究GPS信号与道路信息用于机动导航系统=Research on Match of GPS Signal and Road Information for Mobile Navigation System.International Archives of Photogrammetry and Remote Sensing,Vol.33,B2,2000.7.16-23:Amsterdam:598～602 [30]光栅海图显示系统与电子海图显示与信息系统的差异=Differences Between RCDS and ECDIS.International Maritime Organization∥SN/Cir.207 [31]In-joon K.利用空间不变的神经网络进行图像分类=Image Classification by Spatial Shift Invariant Neural Network.International Archives of Photogrammetry and Remote Sensing,vol.33,B7/2,2000.7.13-16:Amsterdam:636～639 [32]Yousif H.遥感技术在可持续性森林管理中的用途=Inventory of Remote Sensing Applications in Forestry for Sustainable Management.International 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