How To Query Snp Against Genomic Features In R

Question

[Zhenyu Zhang]

Something like query SNP against, say, splicing junctions, or in general, overlapping ranges against genomic and epigenetic features.

I know to use GRanges, but want to know if there is other more convenient packages available there. Especially, tools to download and/or automatically build genomic feature database from ENCODE, UCSC, instead of manually assign GRanges objects like what I am doing now? Thanks.