1703-1730.
Son till Johann Baptist Homann. Fortsatte faderns verksamhet, men dog redan 1730. Han testamenterade företaget till två av sina vänner under förutsättning att det skulle drivas under namnet 'Homanns Erben'. Verksamheten fortsatte under detta namn till 1848.
Allg. d. Biogr.
1664-1740.
In 1691, employed by Petter Gedda as tutor at the marine officers' college. Strömcrona would later succeed Gedda, first as captain then director of pilots. For more than 40 years, he was responsible for sea measurements and the charting of Swedish shipping waters.
Sveriges sjökartor – A. Hedin.
1713-1788.
Became instructor at the pilot school of Karlskrona in 1745. In an official communication pointing out the inadequacy of Swedish sea charts, Wallman called for more astronomical observations and more careful measurements. Appointed commander and director of pilots in 1755, he was handed the opportunity of personally directing marine measurements, principally on the southern coastline. A successor summed up Wallman's career: 'Nobody before or after has made such great personal contribution to the sounding of our coasts'
Sveriges sjökartor – A. Hedin.
Karta öfver Stockholm. - 1904.
'Kalmarsund och Öland.' - Stockholm 1885.
