PyProj

PyProj is an open-source Python library that provides bindings to the PROJPROJPROJ is the foundational open-source library for cartographic projections and coordinate transformations used across ... library, the definitive open-source solution for coordinate reference system transformations. PyProj enables Python developers and GISGISGeographic Information Systems (GIS) enable users to analyze and visualize spatial data to uncover patterns, relation... analysts to convert coordinates between projections, perform datumDatumA geodetic datum is a mathematical model that defines the size, shape, and orientation of the Earth, serving as the r... transformations, and execute geodetic calculations such as distance and azimuthAzimuthAzimuth is the angular measurement of direction from north, measured clockwise in degrees from 0° to 360°. It is a fu... computations on the ellipsoid. PyProj's core classes include CRS for representing and inspecting coordinate reference systems, TransformerTransformerThe Transformer is an attention-based neural network architecture that processes entire sequences in parallel, enabli... for performing coordinate conversions between any two CRS definitions, and Geod for geodetic calculations on the ellipsoid. It supports EPSG codesEPSG CodesEPSG codes are standardized numeric identifiers assigned to coordinate reference systems, datums, and map projections..., PROJ strings, WKT definitions, and authority references for CRS specification. The Transformer class handles complex transformation pipelines including datum shifts through intermediate CRS, ensuring accurate results even for legacy coordinate systemsCoordinate SystemsCoordinate systems standardize the description of geographic locations using latitude, longitude, and other spatial d.... PyProj serves as the coordinate transformation engine for GeoPandasGeoPandasGeoPandas is a Python library that extends pandas DataFrames with geospatial capabilities. It enables spatial operati..., RasterioRasterioRasterio is a Python library for reading and writing geospatial raster data. Built on GDAL, it provides a Pythonic AP..., and many other Python geospatial libraries. It is essential whenever data from different sources with different coordinate systems must be combined or when geographic coordinates need conversion to projected coordinates for accurate distance and area measurements. Surveyors, cartographers, GIS professionals, and spatial data engineers rely on PyProj for ensuring coordinate accuracy across their Python-based geospatial workflows.