PROJkirjasto

PROJkirjasto is a free and open-source geospatial library used for geodetic and geographical transformations. Developed by the Finnish Geospatial Committee, the library provides conversions between different datums, projections, and coordinates systems. The name "PROJkirjasto" translates to "PROJ library" in Finnish.

The library is based on the PROJ.4 format, a widely used standard for geospatial transformations. PROJkirjasto offers a Python interface for easy integration into various programming languages, making it a versatile tool for geospatial data processing and analysis. It provides efficient and accurate conversions between various coordinate systems, including those used in navigation, surveying, and geographic information systems (GIS).

The library supports a wide range of transformation methods, including azimuthal, conic, cylindrical, and geographic conversions. PROJkirjasto also takes into account the specifics of many different countries and regions, including Finland, Sweden, Norway, and others. Users can easily create their own custom datums and coordinate systems using a simple text-based format.

PROJkirjasto has numerous applications in various fields, such as mapping, geospatial analysis, and surveying and positioning. It can be used with popular GIS software and programming languages, like ArcGIS, QGIS, and GDAL. The library is maintained by the Finnish Geospatial Committee, and its source code is available for free under a permissive open-source license.

In summary, PROJkirjasto is a comprehensive and efficient geospatial library offering a broad range of geodetic and geographical transformations. Its ease of use, versatility, and free availability make it a valuable tool for geospatial analysis and data processing in various fields and industries.