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Check z encoding #5

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kylebarron opened this issue Apr 18, 2020 · 1 comment

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kylebarron commented Apr 18, 2020

What is the range of z values in the source file?

serverless-slope/serverless_slope/convert.py

Lines 64 to 67 in efb644a

    
           # https://github.com/tilezen/joerd/blob/0b86765156d0612d837548c2cf70376c43b3405c/joerd/output/normal.py#L176-L179 
        
           # Note that because of rounding necessary to encode as 8-bit ints, the 
        
           # unscaled vector lengths don't add up exactly to 1 
        
           unscaled_z = (arr[:, :, 2] / 128) - 1

Owner Author

kylebarron commented Apr 18, 2020

Although I guess that looks right?

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