ontology-driven discovering model for geographical information services
zhang lichao1; wang keke1; pan zhen1; 2; wang qingshan1; zheng haiying1 1. institute of surveying and mapping; information engineering university; 66 longhai road; zhengzhou 450052; china 2. first the management committee high & new technology industrial development zone of zhengzhou; 6 guohuai road; zhengzhou 450001; china

..............page:24-31

study of substrate and physico-chemical base classification of the rivers of nepal
jha bibhuti ranjan1; waidbacher herwig2; sharma subodh1; straif michael2 1. kathmandu university; dhulikhel; p. o. box 6250; kathmandu; nepal 2. universit zuo t f r bodenkultur; max emanuel-stra e 17 a-1190 wien; austria

..............page:70-76

book review

..............page:77-78

a new conception of image texture and remote sensing image segmentation based on markov random field
gong yan1; shu ning1; 2; li jili3; lin liqun4; li xue1 1. school of remote sensing and information engineering; wuhan university; 129 luoyu road ; wuhan 430079 ; china 2. state key laboratory of information engineering in surveying; mapping and remote sensing; wuhan university; 129 luoyu road; wuhan 430079; china 3. faculty of environmental studies; york university; 2275 bayview avenue toronto; ontario; canada 4. faculty of resource and environmental science; hubei university; wuhan 430062; china

..............page:16-23

a new algorithm of energy suppression for satellite navigation
ji yuanfa1; 2; sun xiyan1 1. satellite navigation lab; guilin university of electronic technology; 1 jinji road; guilin 541004; china 2. national astronomical observatory; datun road; beijing 100012; china

..............page:65-69

design and implementation of spatial data watermarking service system
wu baiyan1; wang wei1; peng zhiyong2; du daosheng1; wang chuanjian2 1. state key laboratory of information engineering in surveying; mapping and remote sensing; wuhan university; 129 luoyu road; wuhan 430079; china 2. international school of software; wuhan university; 129 luoyu road; wuhan 430079; china

..............page:40-48

research and realization of seamless splicing of quasi-geoid
yao yibin; wang jing school of geodesy and geomatics; wuhan university; 129 luoyu road; wuhan 430079; china.

..............page:56-59

comparative study on two methods for calculating the gravitational potential of a prism
han jiancheng1; shen wenbin1; 2; 3 1. school of geodesy and geomatics; wuhan university; 129 luoyu road; wuhan 430079; china 2. state key laboratory of information engineering in surveying; mapping and remote sensing; wuhan university; 129 luoyu road; wuhan 430079; china 3. key laboratory of geospace environment and geodesy; ministry of education; wuhan university; 129 luoyu road; wuhan 430079; china

..............page:60-64

study on the urban heat island effects and its relationship with surface biophysical characteristics using modis imageries
zeng yongnian1; huang wei1; zhan f. benjamin2; zhang honghui1; liu huimin1 1. school of info-physics and geomatics engineering; central south university; 932 lushannan road; changsha 410083; china 2. texas center for geographic information science; texas state university; san marcos; tx 78666; usa

..............page:1-7

new solution for the earth s free wobble and its geophysical implications
chen wei1; 2; shen wenbin1; 2; 3; qin xiaofeng1 1. school of geodesy and geomatics; wuhan university; 129 luoyu road; wuhan 430079; china 2. state key laboratory of information engineering in surveying; mapping and remote sensing; wuhan university; 129 luoyu road; wuhan 430079; china 3. key laboratory of geospace environment and geodesy; ministry of education; wuhan university; 129 luoyu road; wuhan 430079; china

..............page:49-55

study on forecast scenarios for simulation of future urban growth in shenyang city based on sleuth model
wu xiaoqing1; 2; hu yuanman1; he hongshi1; xi fengming1; bu rencang1 1. institute of applied ecology; chinese academy of sciences; 72 wenhua road; shenyang 110016; china 2. yantai institute of coastal zone research; chinese academy of sciences; 17 chunhui road; yantai 264003; china

..............page:32-39

notes to contributors

..............page:76

design of service-oriented architecture for spatial data integration and its application in building web-based gis systems
sha zongyao; xie yichun international school of software; wuhan university; 129 luoyu road; wuhan 430079; china

..............page:8-15

aims&scope

..............page:79