[Openstreetmap-dev] Server is truncating lat/lon values?

Frank Mohr f_mohr at yahoo.de
Mon Jan 23 09:49:33 GMT 2006


Immanuel Scholz wrote:
> Hi again,
> 
> 
>>Is it possible, that values are rounded somewhere in the import process?
>>What is the precision of latitude and longitude values? 32-bit-float? Or
>>64-bit-double?

i assume that the values are stored as DECIMAL(2,6)

> PS: Even if we assume to have the seventh digit of the 23-Bit Mantissa as
> precision, since the first digit of longitude never goes above 8 (I am not
> sure, we can assume this), then we are left with 11 Meter precision, which
> is still unsatisfying.

it goes above 8
Berlin  52.52,  13.37
Munich  48.139, 11.566


frank

	

	
		
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