Motivated　by　the　lack　of　a　geographical　problem　solving　environment　that　is　adequate　to　provide　end　users　with　reliable,　open,　distributed,　and　long　lasting　spatial　data　analyzing　and　knowledge　discovery　services,　a　novel　geographical　knowledge　service　platform　GeoKSGrid　with　functions　of　spatial　decision　support　and　distributed　&　parallel　data　mining　is　described　in　this　paper.　The　basic　concepts　and　state-of-the-art　knowledge　in　grid　research　is　discussed　first.　Then,　the　design　of　system　architecture　and　the　implementation　of　several　most　important　modules　of　GeoKSGrid　are　illustrated.　Finally,　some　demonstrative　applications　of　the　geographical　knowledge　services　in　real　industry　contexts　is　examined,　combining　with　a　brief　interpretation　of　the　processing　results　which　confirm　the　practical　value　of　the　services　and　knowledge　grid　platform.　©　2011　IEEE.