Accuracy of the original human DNA datasets sequenced by Human Genome Project? The Human Genome Project was the project of 'determining the sequence of nucleotide base pairs that make up human DNA, and of identifying and mapping all of the genes of the human genome'. It was declared complete in 2003, i.e. 99% of the euchromatic human genome completed with 99.99% accuracy.

Are the datasets provided by HGP still accurate, or as accurate as was claimed in 2003? 

Given the technology in the past (such as using old techniques), or any other reason (newer research studies), is it possible that the datasets are not as accurate as originally expected?
The HGP developed the first "reference" human genome - a genome that other genomes could be compared to, and was actually a composite of multiple human genome sequences. 

The standard human reference genome is actually continually updated with major and minor revisions, a bit like software. The latest major version is called GRCh38, was released in 2013, and has since had a number of minor updates. 


  Are the datasets provided by HGP still accurate?


Yes, in a sense, but we certainly have better information now. One way to measure the quality of the assembly is that the initial release from the HGP had hundreds of thousands of gaps - sequences that could not be resolved (this often occurs because of repetitive sequences). The newest reference genome has less than 500 gaps.