[mkgmap-dev] open issues in the housenumber2 branch

Sun Mar 1 10:03:22 GMT 2015

Hi Gerd,

I agree with you that the trunk approach is the better solution. I think
that the second case is difficult to develop and maintain and adds little
value in terms of navigation.

Alexandre

2015-03-01 5:42 GMT-03:00 Gerd Petermann <gpetermann_muenchen at hotmail.com>:

> Hi all,
>
> during the last days I've analysed the reasons for the error messages
> reported
> by some of you. I came to the conclusion that I have to
> - change the handling of addr:interpolation ways completely
> - add code to detect the "random number" case earlier and - if detected -
> use different methods to split the number intervals
>
> Both are rather complex changes, so I'll need a few days to code this.
>
> One open question for you:
> How should we handle "missing" information?
> If mkgmap finds the numbers 1,3,9,11,17  in that order on the left side
> of a road called ABC, it can create different housenumber informations.
> One could  be like "odd numbers from 1 to 17 on the left",
> another could be a more complex sequence
> 1) "odd numbers from 1 to 3 on the left",
> 2)"odd numbers from 9 to 11 on the left",
> 3) "odd number 17 on the left"
> A search for ABC 5 would either show a point between 3 and 9
> or two entries with the numbers 3 and 9.
> The latter tells you that OSM probably doesn't contain the
> exact information and let's you decide where to search for ABC 5.
>
> The trunk version tends to the simple info, while r3486
> is more likely to produce the complex one.
> I think trunk is better here, the complex case should only
> occur if the "random number" case was detected.
>
> Do you agree?
>
> Gerd
>
>
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