what are the vast majority of indo greek maps you are refering to i personally know only two published ones one by the indian ministry of tourism on internet minimalist and now one by the atlas der welt geschichte which visibly takes into account all available sources and is probably more respectable as a historical reference any reference for this claim on the vast majority of indo greek maps about only verified administrative regions for a map a map is not only based on verified archaeological data as you seem to claim literary sources also play a major role there is almost no archaeological evidence of alexander's campaings in india only litterary evidence which are nevertheless the source for all the maps of alexander in india in the case of the indo greeks we have a combination of archaeological and very varied literary evidence both greek and indian relating their conquests which is visibly the base of the atlas der welt geschichte as well as my previous maps dimita could very well be vima or vimaka you failed to read the rest which states that vima or vimaka is not considered as a proper hypothesis since the king is qualified as a yavana an unknown occurence for kushans and the paleography indicate a nd century bce date