Re: [OSM-talk] # with color code

[Yves]

The value is defined as an hexadecimal rgb code, starting with a #. 
I think most data consumers try to decode it with or without a #, its an easy 
to fix typo.
Yves 

Le 28 septembre 2017 18:59:15 GMT+02:00, James  a écrit :
>usually # specifies that it's a hexidecimal number vs a base 10 number.
>When you have letters A-F it's obvious that it's hexidecimal and can be
>implecitely converted.
>
>The issue is when you don't have letters:
>255
>
>in hexadecimal 255 is
>2*16^2
>+
>5*16^1
>+
>5*16^0
>= 512+80+5=597
>
>255 base 10 would be represented by ff in hex.
>
>On Sep 28, 2017 12:08 PM, "Jack Armstrong dan...@sprynet.com" <
>jacknst...@sprynet.com> wrote:
>
>> It's been my experience that colors render just fine without a '#'
>before
>> the code number. Is usage of a # prefix really necessary? What
>problems
>> will occur if it isn't attached? Thanks :)
>>
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>> talk mailing list
>> talk@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk
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Re: [OSM-talk] # with color code

[James]

usually # specifies that it's a hexidecimal number vs a base 10 number.
When you have letters A-F it's obvious that it's hexidecimal and can be
implecitely converted.

The issue is when you don't have letters:
255

in hexadecimal 255 is
2*16^2
+
5*16^1
+
5*16^0
= 512+80+5=597

255 base 10 would be represented by ff in hex.

On Sep 28, 2017 12:08 PM, "Jack Armstrong dan...@sprynet.com" <
jacknst...@sprynet.com> wrote:

> It's been my experience that colors render just fine without a '#' before
> the code number. Is usage of a # prefix really necessary? What problems
> will occur if it isn't attached? Thanks :)
>
> ___
> talk mailing list
> talk@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk
>
>
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[OSM-talk] # with color code

[Jack Armstrong dan...@sprynet.com]

It's been my experience that colors render just fine without a '#' before the code number. Is usage of a # prefix really necessary? What problems will occur if it isn't attached? Thanks :)

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