Well Known Text
 
WKT Version 2
COORDINATEOPERATION["Baltic 1977 height to Caspian height (1)",VERSION["Caspian Sea"],SOURCECRS[VERTCRS["Baltic 1977 height",VDATUM["Baltic 1977",ID["EPSG",5105]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",5705]]],TARGETCRS[VERTCRS["Caspian height",VDATUM["Caspian Sea",ID["EPSG",5106]],CS[vertical,1,ID["EPSG",6499]],AXIS["Gravity-related height (H)",up],LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",5611]]],METHOD["Vertical Offset",ID["EPSG",9616]],PARAMETER["Vertical Offset",28,LENGTHUNIT["metre",1,ID["EPSG",9001]],ID["EPSG",8603]],OPERATIONACCURACY[0],ID["EPSG",5438]]