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Codex Sinaiticus is a manuscript handwritten over 1600 years ago, containing the Christian Bible in Greek including the oldest complete copy of the New Testament, and is considered one of the most important books in the world. The international Codex Sinaiticus Project works to reunite the entire manuscript in digital form and make it accessible to a global audience for the first time, and the associated website provides access to the manuscript’s contents including navigation to individual biblical books and texts.

CODE-DE

code-de.org

CODE-DE-Lab is the national platform for the provision and processing of Earth observation data in Germany. It offers searching, access, analysis and processing of a repository of Earth observation data on a cloud infrastructure, with services described as free of charge. Infrastructure resources are reserved for German public authorities and the academic community.

Searchable repository for finding atmospheric, oceanography and climate datasets and datasets.

CoCoON

cocoon.huma-num.fr

CoCoON is a technical platform that supports producers of oral resources in creating, structuring and archiving corpora, which may contain audio recordings and annotations. Resources are catalogued, stored and archived in the Huma-Num archive, while authors and their institutions remain responsible for deposited materials. The platform is jointly managed by LACITO, LLL and Huma-Num.

COCONUT

coconut.naturalproducts.net

COCONUT, short for COlleCtion of Open Natural prodUcTs, is a platform that facilitates natural product research by providing data, tools and related resources while upholding FAIR principles for research data management. It offers access to collections, documentation, a REST API, a public codebase, usage statistics, service health checks and download functionality, with an associated public issue tracker.

coastMap

hereon.de

Search analytical chemistry data collections and supporting datasets from DEU.

coastDat is a model-generated database used to assess long-term changes in data-poor regions. Numerical models reconstruct marine climate aspects such as storms, waves and storm surges, and ecosystems, relying on large-scale atmospheric information. Where possible, reconstructions are supplemented by climate change projections. The approach has been applied to issues in the North and Baltic Seas.

Coastal Data Information Program

cdip.ucsd.edu

The Coastal Data Information Program (CDIP) measures, analyzes, archives and disseminates coastal environment data. It specializes in wave measurement, swell modeling and forecasting, and analysis of coastal environment data. CDIP is an extensive network for monitoring waves and beaches along United States coastlines, operated by the Ocean Engineering Research Group at Scripps Institution of Oceanography. It has produced a publicly-accessible environmental data database since 1975.

CNRS Research Data

entrepot.recherche.data.gouv.fr

Find and access chemistry research data, with indexed aggregated data.

CNGBdb

db.cngb.org

CNGBdb is a unified platform for sharing and applying biological big data with the research community. Built on big data and cloud computing technologies, it offers data services including archiving, analysis, knowledge search, management authorization, and visualization.

The CMU Graphics Lab Motion Capture Database is a searchable collection of motion capture data created by Carnegie Mellon University's Graphics Lab. It contains 2605 trials across 6 categories and 23 subcategories, browsable by subject number or motion category. The dataset is free for all uses, though direct resale of the data is not permitted.

Clouds and the Earth's Radiant Energy System

ceres.larc.nasa.gov

The Clouds and the Earth's Radiant Energy System (CERES) is a NASA project that provides satellite-based observations of Earth's radiation budget and cloud properties. It uses measurements from CERES instruments aboard multiple satellites along with data from other instruments to collect these observations. The project offers data ordering, subsetting and visualization tools, an online radiative transfer tool, and associated documentation and educational resources.

ClinicalTrials.gov

clinicaltrials.gov

Search biology data collections and supporting clinical trial data from USA.

ClinicalCodes.org is an online repository for clinical code lists from published electronic medical record studies, intended to support validity and reproducibility of medical database research. It aims to hold code lists for all code types and databases, with deposited lists freely downloadable without login. Contents are being migrated to the HDR UK Phenotype Library, and new content should be submitted there.

Browse research datasets and datasets related to biology.

Clinical Research Metadata Repository

newmdr.ecrin.org

Find and access life research data, with indexed datasets.

Clinical Proteomic Tumor Analysis Consortium Data Portal

cptac-data-portal.georgetown.edu

Find and access basic in biology and medicine research data, with indexed datasets.

A manually curated database of conditions with known genetic causes, maintained within the NHGRI Division of Intramural Research. It focuses on medically significant genetic data with available interventions and lets users search or browse by manifestation and intervention categories. It offers statistics, downloads and public domain reference information.

ClimateData.ca

climatedata.ca

ClimateData.ca provides climate data and resources intended to support decisions in a changing climate. The site offers maps and graphs for creating and downloading data visualizations, a searchable catalogue of 125 datasets, and on-demand processing to tailor datasets using custom thresholds and time periods. It also includes a Learning Zone and newsletters about updates.

Climate Watch

climatewatchdata.org

Climate Watch is an open online platform that provides climate data, visualizations and resources to help users gather insights on national and global progress related to climate change, sustainable development and the Paris Agreement goals.

Climate Hazards Center Data Archive

chc.ucsb.edu

The Climate Hazards Center Data Archive provides access to gridded rainfall and temperature datasets, including CHIRPS, CHIRPS-GEFS, CHPClim, and CHIRTS. CHIRPS combines satellite imagery with station data to create rainfall time series; CHIRPS v3 covers 60°N-60°S from 1981 to near present. Bulk download instructions are available at a separate data site.

Climate Data Online

ncdc.noaa.gov

Climate Data Online is a service of the National Climatic Data Center providing free access to an archive of global historical weather and climate data and station history information. Its data include quality controlled daily, monthly, seasonal and yearly measurements of temperature, precipitation, wind and degree days, plus radar data and 30-year Climate Normals. Data can be viewed online or ordered for delivery by email.

Climate Data Gateway at NCAR

gdex.ucar.edu

GDEX is NSF NCAR's platform for discovering, sharing, preserving, and analyzing Earth system science data. It provides a dataset search interface, a data deposit request process, and specialized AI-ready and Zarr format datasets. Web services include an API, a Python client, OAI-PMH metadata harvesting, and CSW metadata exposure. Registered users can run a client utility to submit subset requests on select gridded datasets and download completed outputs.

Searchable repository for finding geosciences datasets and compiled data.