> Den 4. maj 2016 kl. 10.07 skrev Shameema Mohsin <[email protected]>: > > > Z value calculation > ................................ > step1: converting lat and long to int > > latitude int = (latitude + 90) × 10^6 > longitude int = (latitude + 180) × 10^6 > > note 10^6 = 1000000 > > We compute the Morton value for a spatial point P (x, y) > by interleaving the bits of x and y. For example, when x = > 3(011 ) and y = 4(100), the Morton value for P is > 100101 = 37 > > step2: convert int (base 10) to binary digits (base 2) > ..........? > step3: interleave both values bits and compute z value > take first bit from y cordinate (longitude) : 1 > take first bit from x cordinate (lat) : 0 > take 2nd bit from y cordinate (longitude) :0 > take 2nd bit from x cordinate (lat) : 1 > #take 3rd bit from y cordinate (longitude) : 0 > #take 3rd bit from x cordinate (lat) : 1 > > therefore z binary value is 100101 > and z value is 37 > > #this is the technique used to convert spatial 2D indexing to 1D to improve > efficiency. > > I do not know the python syntax. Kindly help.
I'm sorry, but asking for a full Python implementation of the above is too much to ask for free help for. Implement it in PHP if that's what you're familiar with, and grab a Python handbook to look up the equivalent Python syntax. Erik -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/EDD2FC06-6471-44E4-8BFD-F02C59AC42FD%40cederstrand.dk. For more options, visit https://groups.google.com/d/optout.
