For users who would like additional GNN attributes or years (currently 1986-2017), we will consider requests to expanded access on a case-by-case basis.

To process additional data requests, we require knowledge of the use being proposed so that we can both determine what data are needed and the appropriateness of proposed analyses. Please be explicit, especially with respect to the mapped variables and years of data.

Once we have reviewed and accepted your request, we will give you authenticated access to these additional rasters through this same download site. Please allow one week for us to review your request.

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