pohjakartan

Pohjakartan, also known as base mapping or foundational cartography, refers to the creation of detailed and accurate maps that serve as the fundamental layer for various geographic and spatial applications. These maps typically depict the natural and man-made features of a region, including topography, hydrology, vegetation, infrastructure, and administrative boundaries. Pohjakartan is essential for planning, navigation, environmental management, and urban development, providing a standardized reference for more specialized mapping projects.

The process of producing pohjakartan involves extensive field surveys, remote sensing techniques, and geographic information system (GIS) technologies. Surveyors collect data on elevation, land cover, and other physical attributes, while satellite imagery and aerial photography are used to capture large-scale details efficiently. This data is then processed, analyzed, and compiled into a coherent map product, often in digital formats for easy integration with other spatial datasets.

Pohjakartan is commonly produced by national mapping agencies, such as Finland’s National Land Survey (Maanmittauslaitos), which ensures consistency, accuracy, and accessibility for public and private use. These maps are regularly updated to reflect changes in the landscape, infrastructure, and administrative divisions. They serve as a critical resource for various stakeholders, including government agencies, urban planners, environmental scientists, and emergency responders.

In Finland, pohjakartan is particularly important due to the country’s vast and diverse terrain, including forests, lakes, and urban areas. The National Land Survey maintains a comprehensive database of pohjakartan, offering both printed and digital versions for different applications. This foundational mapping supports navigation, land use planning, and disaster management, ensuring that Finland’s geographic data remains reliable and up-to-date.