Nearmap Ltd(ASX: NEA) share price hasn’t had a great year so far. Year-to-date its shares are down almost 21%, due largely to profit-taking following a strong gain last year. Whilst I am a big fan of the company and its aerial imagery technology, it is certainly a high risk investment. In my opinion its future success depends largely on its performance in the massive U.S. market. Although progress has been slower than anticipated, there are signs that the U.S. business is gaining traction now. This could potentially make it an opportune time to invest.