Geomatics and Information Science of Wuhan University TOTAL CONTENTS (Vol.2 7No.1-6,2002)

Ｎｏ .1ＴｈｅＴｅｃｈｎｉｑｕｅＩｎｔｅｇｒａｔｉｏｎｏｆｔｈｅＳｐａｔｉａｌＩｎｆｏｒｍａｔｉｏｎａｎｄＭｏｂｉｌｅＣｏｍｍｕｎｉｃａｔｉｏｎ (1)…………………………………………………ＬＩＤｅｒｅｎ　ＬＩＱｉｎｇｑｕａｎ　ＸＩＥＺｈｉｙｉｎｇ　ＺＨＵＸｉｎｙａｎＲｅｓｅａｒｃｈａｎｄＤｅｖｅｌｏｐｍｅｎｔｆｏｒＩＴＵ＿ＴＨ .3 2 4ＲｅｃｏｍｍｅｎｄａｔｉｏｎＣｏｍ ｐｌｉａｎｔＶｉｄｅｏｐｈｏｎｅＳｙｓｔｅｍ (9)………………………………………ＨＵＲｕｉｍｉｎ　ＬＩＤｅｒｅｎ　ＹＵＺｈａｎｗｕ　Ｓ…     

Geomatics and Information Science of Wuhan University TOTAL CONTENTS (Vol.2 6No .1-6 ,2 0 0 1)

Ｎｏ .1ＴｈｅＴｅｃｈｎｉｑｕｅＩｎｔｅｇｒａｔｉｏｎｏｆｔｈｅＳｐａｔｉａｌＩｎｆｏｒｍａｔｉｏｎａｎｄＣｏｍｍｕｎｉｃａｔｉｏｎＬＩＤｅｒｅｎ　ＬＩＱｉｎｇｑｕａｎ( 1)……………………ＴｈｅＤｅｓｉｇｎａｎｄＩｍｐｌｅｍｅｎｔａｔｉｏｎｏｆＣｙｂｅｒＣｉｔｙＧＩＳＺＨＵＱｉｎｇ　ＬＩＤｅｒｅｎ　ＧＯＮＧＪｉａｎｙａ　ＸＩＯＮＧＨａｎｊｉａｎｇ( 8)ＬｏｏｋＤｉｒｅｃｔｉｏｎＥｒｒｏｒａｎｄＩｔｓＣｏｒｒｅｃｔｉｏｎｏｎＡｉｒｂｏｒｎｅＩｍａｇｉｎｇＳｃａｎｎｅｒＩｍａｇｅ ＹＥＺｅｔｉａｎ　ＨＥ…     

THE (t – T) CORRECTION FOR THE LAMBERT No. 2 (CONICAL ORTHOMORPHIC) PROJECTION

Abstract

I. The present writer has been trying for the past two years to get reasonably easy expressions for the (t – t) correction and the scale factor in the Lambert NO.2 Projection. He succeeded in obtaining a formula for (t – t) in terms of eastings and northings, but, like the author of the articles on “Grid Bearings and Distances on the Conical Orthomorphic Projection” which were published recently in this Review, he came to the conclusion that any such formula is too unwieldy for ordinary use. He then tried to get an expression for (t – t) in terms of latitude and longitude, and has now obtained one by purely empirical methods which seems to work in practice. No proof of this formula is offered, or is available at present, as this is a matter which the writer is content to leave to others with greater mathematical interests and attainments than he possesses.     

Using Maximum Likelihood (ML) and Maximum A Prior Probability (MAP) in Iterative Self‐Organizing Data (ISODATA)

Abstract

With the availability of high‐resolution satellite imagery featuring as high as 1 meter resolution in the panchromatic mode and 3‐meter resolution in the multispectral mode, there is an interest by many new commercial and public service applications such as cellular telephones coverage area design, urban/land cover planning, and real estate marketing to extract features from images automatically. To that end, the demand for unsupervised classification techniques is growing. In this paper, the Maximum Likelihood (ML) and Maximum A prior Probability (MAP) algorithms are used as decision rules to find boundaries of classes computed by the Iterative Self‐Organizing Data (ISOADATA) algorithm. Different satellite images with different resolutions were used to experiment with these algorithms. The results of comparing and analyzing the algorithms revealed that MAP‐ISODATA performed better than ML‐ISODATA even when the same initial matrix was used. It was shown that there was no significant difference between ML‐ISODATA and MAP‐ISODATA in terms of accuracy. It was also realized that better results could be obtained if homogenous initialization strategies were used.     

Geo-spatial Information Science TOTALCONTENTS (Vol.8 lssues1-4,2005)

Issue 1Prospect on Present-Day Crustal Kinematics and DynamicsResearch in Sichuan-Yunnan Area with Geodetic Data……………………………………………………………1XUCaijun LI Zhicai WANG QiApplication of Geodetic Receivers to Ti ming and Ti meTransfer…………………………………………………8NIE Guigen LIUJingnanA Case Study of Using External DEMin InSAR DEM Gener-ation……………………………………………………14ZHOU Chunxia GE Linlin E Dongchen CHANGHsingchungElements and Ex…     

Geo-spatial Information Science TOTAL CONTENTS (Vol.4No .1-4 ,2 0 0 1)

Ｎｏ .1ＡｄｊｕｓｔｍｅｎｔｏｆＬｅｖｅｌｉｎｇＮｅｔｗｏｒｋｂｙＩｎｆｏｒｍａｔｉｏｎＳｐｒｅａｄＥｓｔｉｍａｔｉｏｎ 1…………………………………………………ＷＡＮＧＸｉｎｚｈｏｕＯｎｔｈｅＥｖａｌｕａｔｉｏｎｏｆＤｅｆｌｅｃｔｉｏｎｓｏｆｔｈｅＶｅｒｔｉｃａｌＵｓｉｎｇＦＦＴＴｅｃｈｎｉｑｕｅ 5…………………………………………………ＨＵＡＮＧＭｏｔａｏ　ＺＨＡＩＧｕｏｊｕｎ　ＧＵＡＮＺｈｅｎｇ　ＯＵＹＡＮＧＹｏｎｇｚｈｏｎｇＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＷｅｉｇｈｔｅｄＭｅａｎＴｒｏｐｏｓｐ…     

Geo-spatial Information Science TOTAL CONTENTS(Vol.6 Issue 1-4,2003)

ISsuelISSUeZDefermination of GeoPotential of Loeal Ver飞ieal DatumSurface········,·············、···········,···········1···.···……1WEIZ匆ing JIAOW七nhaiGPS RaPid Statie and Kinematie Positionjng Based on GPSActive Network··········································……5C月EN Wu HU Congwei CHEN YOngqiDINGX泛aolis艺mo,:Chi一wo Ko切klmProvement of Theories and Methods in Geodetie Join…     

Geo-spatial Information Science TOTAL CONTENTS(Vol.9 lssues 1-4,2006)

~~Geo-spatial Information Science TOTAL CONTENTS(Vol.9 lssues 1-4,2006)~~     

Geo-spatial Information Science TOTAL CONTENTS (Vol.5 Issue 1-4,2002)

Ｉｓｓｕｅ 1ＴｈｅＩｎｔｅｇｒａｔｉｏｎｏｆＣｏｏｐｅｒａｔｉｏｎＭｏｄｅｌａｎｄＧｅｎｅｔｉｃＡｌｇｏｒｉｔｈｍ1……………………………………………………………ＺＨＥＮＧＺｈａｏｂａｏＥｌｅｃｔｒｏｎｉｃＣｈａｒｔＤｉｓｐｌａｙａｎｄＩｎｆｏｒｍａｔｉｏｎＳｙｓｔｅｍ 7………ＷＡＮＸｉａｏｘｉａ　ＧＡＮＣｈａｏｈｕａＲｅｍｏｖｉｎｇＮｏｎ＿ｕｎｉｆｏｒｍＩｌｌｕｍｉｎａｔｉｏｎＥｆｆｅｃｔｓｆｒｏｍＤｅｅｐ＿ｓｅａＦｌｏｏｒＩｍａｇｅｓ 12……………………………………………ＪＩＮＳｈｕｙｉｎｇ　…     

《武汉测绘科技大学学报》1991年总目录(VOl.16,NO.1～4)

工程测量北京正负电子对撞机直线加速器安装的精密测量鲜水河断裂带垂直形变资料初析···············……潘正风.V01.16(1):13~18吴子安.V01.16(2):1~7建筑工程应用于复合型脆断的综合断裂理论····························……八二李波扬.Vol.16(1):62~67晶粒大小对断裂韧性的影响··················……李文兰Tames.c.M.Li vol.16(2):79~91HX一100多功能三轴仪与花岗岩残积土动力特性研究、‘_ ..................··.··········一杨丹吴世明吴小玲.Vol.16(…     

《武汉测绘科技大学学报》1990年总目录(Vol.15,No.1～4)

第一期平面监测网动态滤波········,··················································,·········……徐晖(1)用、精密水准对激光准直垂直方向施加改正的探讨·····················……潘正风花向红(12)弦线法解算大地测量主题精密公式···················································……徐绍仕(19)GPS接收机天线装置定向标志线及平均相位中心参数的检测············…     

《武汉测绘科技大学学报》1988年总目录(Vol.13,No.1～4)

第一期虚拟单层密度精度的进一步改善及其快速计算方法······························……邱卫根(1)方差分量估计理论及其在边角网平差中的应用····································……张万鹏(9)航摄系统调制传递函数(MTF)的测定及其应用·················,···············……李莉华(22)重复中值估计及其在坐标变换中的应用·············································,··……     

《武汉测绘科技大学学报》1987年总目录 (Vol.12,No.1—4)

第一期吉文斯变换及其在序贯最小二乘平差中的应用···、···········,········、、,·········……吕言(1)监测水准网的滤波方法······,········,·····,·····,····································,··…冯延明(14)武汉地区第四纪与新构造的基本特征及需要进一步研究的问题··············,……丁宝田(26)边界单元法及其在位势问题近似解法中的应用··············4··············,······、·…     

SPIRIT. SPOT 5 stereoscopic survey of Polar Ice: Reference Images and Topographies during the fourth International Polar Year (2007–2009)

Monitoring the evolution of polar glaciers, ice caps and ice streams is of utmost importance because they constitute a good indicator of global climate change and contribute significantly to ongoing sea level rise. Accurate topographic surveys are particularly relevant as they reflect the geometric evolution of ice masses. Unfortunately, the precision and/or spatial coverage of current satellite missions (radar altimetry, ICESat) or field surveys are generally insufficient. Improving our knowledge of the topography of Polar Regions is the goal of the SPIRIT (SPOT 5 stereoscopic survey of Polar Ice: Reference Images and Topographies) international polar year (IPY) project. SPIRIT will allow (1) the acquisition of a large archive of SPOT 5 stereoscopic images covering most polar ice masses and, (2) the delivery of digital terrain models (DTM) to the scientific community.Here, we present the architecture of this project and the coverage achieved over northern and southern polar areas during the first year of IPY (July 2007 to April 2008). We also provide the first accuracy assessments of the SPIRIT DTMs. Over Jakobshavn Isbrae (West Greenland), SPIRIT elevations are within ±6 m of ICESat elevations for 90% of the data. Some comparisons with ICESat profiles over Devon ice cap (Canada), St Elias Mountains (Alaska) and west Svalbard confirm the good overall quality of the SPIRIT DTMs although large errors are observed in the flat accumulation area of Devon ice cap. We then demonstrate the potential of SPIRIT DTMs for mapping glacier elevation changes. The comparison of summer-2007 SPIRIT DTMs with October-2003 ICESat profiles shows that the thinning of Jakobshavn Isbrae (by 30–40 m in 4 years) is restricted to the fast glacier trunk. The thinning of the coastal part of the ice stream (by over 100 m) and the retreat of its calving front (by up to 10 km) are clearly depicted by comparing the SPIRIT DTM to an ASTER April-2003 DTM.