Loots was originally a nautical instrument maker, who worked in the same street as Johannes van Keulen and Hendrick Doncker. In the 1680s he served as an apprentice to Doncker. He was accepted into the Guild of Booksellers in 1693 and began publishing charts and atlases under his own name, flourishing in the competitive sea chart trade of the late seventeenth and early eighteenth centuries. Loots published several sea atlases and separately issued charts.