Struve Geodetic Arc Porlammi World Heritage site In 1833, a point of the Struve Arc was surveyed on top of Tornikallio in Lapinjärvi. The drillhole worn by erosion is still detectable. Despite being partly covered by fo

First Page		Document Content
Date: 2017-09-06 07:20:32		Struve Geodetic Arc Porlammi World Heritage site In 1833, a point of the Struve Arc was surveyed on top of Tornikallio in Lapinjärvi. The drillhole worn by erosion is still detectable. Despite being partly covered by fo Add to Reading List Source URL: www.maanmittauslaitos.fi Download Document from Source Website File Size: 1,50 MB Share Document on Facebook