Revmetrix: D.C. retail analytics startup lands $2.2 million seed round

District-based Revmetrix, which aims to create an "omnichannel data platform" for retailers, has secured $2.2 million in seed funding. The round was led by Philadelphia-based Genacast Ventures and Boston-based .406 Ventures. The fund includes an undisclosed amount in convertible notes previously made by some angel investors, including Sean Glass, Jerry Neuman and Jay Vairdy. So what is an omnichannel data platform? Co-founder and CEO Hemang Gadhia described it to me as software that could be used…