OCGIS is short for OpenClimateGIS, a set of geoprocessing and calculation tools for CF-compliant climate datasets. OCGIS is a Python package designed for geospatial manipulation, subsetting, computation, and translation of climate datasets stored in local NetCDF files or files served through THREDDS data servers. OpenClimateGIS has a straightforward, request-based API that is simple to use yet complex enough to perform a variety of computational tasks. The software is built entirely from open source packages. ClimateTranslator is a new web interface to the OpenClimateGIS functionality