Well, it appears to me something like this will work?:
This geo thing is a complex format in its general case. 

byte 1  ="G" 
byte 2 = "P'
byte 3 = 0  # means version 1 -> probably doesn't matter
byte 4 = 5  # flags: little endian, 32 bit (Intel) for each point, 
            # 6 values for each data set, 6x8 = 48 bytes each 
byte 5-8  = # srs_id = 0x0000346C = Unique identifier for each 
            # Spatial Reference System within a GeoPackage
            # I have no idea what that means?
byte 9-...  # start of data.. is here...
            # 
            #

[download]
Fetching and decoding 1.4 million points is no big deal. Will run in less than a minute. Also please understand that buzzwords like SRSID or OSGB mean nothing to me - I am clueless.

In reply to Re^5: Geo Package files by Marshall
in thread Geo Package files by Bod

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.