> For the complete documentation index, see [llms.txt](https://azen.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://azen.gitbook.io/whitepaper/poc-tokenomics/proof-of-contribution-poc/data-center-poc.md).

# Data Center PoC

Definition: Evaluates the contribution of all nodes hosted in data centers. 

Formula 

*PDC=∑PC×CDCPD​C=∑PC​×CD​C*

Where: 

*∑PC∑PC*​ = Total PoC from all nodes in the data center. 

CDCCD​C = Data Center coefficient.

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