Yahoo Japan has led a $4.3m round for geomagnetic positioning technology developer IndoorAtlas, three years after Baidu invested $10m in the company.

IndoorAtlas, a Finland-based indoor positioning technology developer spun out from University of Oulu, closed a €3.6m ($4.3m) series B round led by internet company Yahoo Japan yesterday.

Family-owned investment firm Takoa Invest and venture capital firm Innovestor Ventures also participated in the round, as existing investors. Kazuhiro Ninomiya of Yahoo Japan will join the company’s board of directors in conjunction with the round.

Founded in 2012, IndoorAtlas is working on geomagnetic indoor positioning technology that uses smartphone sensors capable of…