Added --image and --dem documentation to command line parameters
Added --image and --dem documentation to command line parameters


XiaoCC/osg,ghub/osg,stmh/osg,omega-hub/osg,artoolkit/osg,omega-hub/osg,ntoand/osg,XiaoCC/osg,ghub/osg,artoolkit/osg,ntoand/osg,ntoand/osg,ghub/osg,XiaoCC/osg,artoolkit/osg,ghub/osg,koshman86/osg,stmh/osg,stmh/osg,koshman86/osg,ntoand/osg,koshman86/osg,omega-hub/osg,stmh/osg,artoolkit/osg,XiaoCC/osg,stmh/osg,XiaoCC/osg,omega-hub/osg,koshman86/osg