Re: manipulate n insert field values

> Den 4. maj 2016 kl. 10.07 skrev Shameema Mohsin <itz.shameema@gmail.com>:
>
>
> 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

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