text: user3039: I am looking at genomic data (HG19). I have many SNPs, their chromosomes and positions.
  I want to look at certain SNP (suppose its chromosome is 1 and position 77,226,919), and extract all SNPs in distance 1mb from that SNP.
  Are the HG19 position in terms of base-pairs? Meaning that I need to take all SNPs in position $77,226,919 \pm100,000$? Or is it something else?
  
  user4001: HG19 refers to the build used as the reference genome. To extend on what @Emily_Ensembl said, base pair positions may change between different builds.
  Please look at the following link for a more detailed explanation: https://gatk.broadinstitute.org/hc/en-us/articles/360035890951-Human-genome-reference-builds-GRCh38-or-hg38-b37-hg19
  
  user1332: Yes, they are base pair positions
  
original_text: 3039: <p>I am looking at genomic data (HG19). I have many SNPs, their chromosomes and positions.
  I want to look at certain SNP (suppose its chromosome is 1 and position 77,226,919), and extract all SNPs in distance 1mb from that SNP.</p>
  <p>Are the HG19 position in terms of base-pairs? Meaning that I need to take all SNPs in position <span class="math-container">$77,226,919 \pm100,000$</span>? Or is it something else?</p>
   4001: <p>HG19 refers to the <em>build</em> used as the reference genome. To extend on what @Emily_Ensembl said, base pair positions may change between different builds.</p>
  <p>Please look at the following link for a more detailed explanation: <a href="https://gatk.broadinstitute.org/hc/en-us/articles/360035890951-Human-genome-reference-builds-GRCh38-or-hg38-b37-hg19" rel="nofollow noreferrer">https://gatk.broadinstitute.org/hc/en-us/articles/360035890951-Human-genome-reference-builds-GRCh38-or-hg38-b37-hg19</a></p>
   1332: <p>Yes, they are base pair positions</p>
  