korkeusviitteitä

Korkeusviitteitä, also known as elevation benchmarks or height references, are fixed points on the Earth's surface whose exact elevation above a defined reference level are known and surveyed. These points are crucial for various surveying, engineering, and mapping applications. They serve as a basis for establishing vertical control networks, ensuring consistency and accuracy in elevation measurements across a region.

The reference level used for korkeusviitteitä is typically mean sea level, though other datums may be used depending on national or regional standards. These datums are established through extensive geodetic surveys that often involve tide gauges. The precise elevation of a korkeusviite is determined through rigorous leveling procedures, which involve measuring the difference in height between known points.

Korkeusviitteitä can be physical markers embedded in stable structures like bedrock, buildings, or monuments, or they can be implicitly defined by existing infrastructure like bridges. Their primary purpose is to provide a reliable starting point for any project requiring accurate height information, preventing cumulative errors and ensuring that different surveys are comparable. The density and distribution of korkeusviitteitä vary by region, with more points typically found in areas with significant development or complex topography.