From a quick glance I would think also about changing your pricing structure. $10 a conversion sounds high, a better alternative might be to offer a subscriptio

From a quick glance I would think also about changing your pricing structure. $10 a conversion sounds high, a better alternative might be to offer a subscription model with a free trial up front perhaps? In terms of finding customers I would suggest you forget AdWords (too scattered) and start with direct contact with the major companies in the mapping field. For example, why not drop Ordnance Survey a line and explain about your product and ask if there's any way this could be useful to their users etc? http://www.ordnancesurvey.co.uk/oswebsite/gisfiles/ http://www.ordnancesurvey.co.uk/oswebsite/gisfiles/