[mkgmap-dev] Meaning of option --x-mdr7-excl

Tue Apr 4 22:23:48 BST 2017

this option would be good use also without split-names option. I append
stuff like path or ft or M4/5 for information of the OSM tags into ways -
there is no reason to show it in the address search. I could easily exclude
this also right now I'm not fully sold on split--names option for my maps
(might use it - have to experiment - until now with appending the street
type into all names it was not feasible anyhow).

on the other hand I would actually prefer a different approach - a key like
mkgmap:searchname mkgmap:searchname1 and so on - as I would love for all
indexes to be searchable for name and name:en. E.g. I want a map of europe
to return Bruxelles and Brussels in the POI search - and if possible also
in address search. (or Munich and München and so on). This could be
achieved by setting name - name:en - but different keys in style would
actually profit even more. split-names could still be used - for splitting
up. But main thing would be to be able to search for english and local
names in all maps. POI - it is possible right now by simply duplicating the
POI with continue for address search it is mainly about city name - not
sure if it's possible or not.

On 4 April 2017 at 22:01, <thesurveyor at wolke7.net> wrote:

> Hi  Gerd,
>
> at first: many thanks for your work. I'm typically just reading your posts
> and using mkgmap with a lot of fun.
>
> For this topic I will try to explain my thougths, but maybe I didn't
> understood all those options
>
> - the original name should always be in the index, because that's it what
> everybody knows and expects to find
> - with --x-mdr7-excl=X  we should avoid the entry "X" in the index
>
> for example:
>
> Using --x-mdr7-excl=Road,Street,Chenin,des,de in combination with --x-split-name-index
>
> should insert into index, for
> name="ABC Straße"  -  in index: "ABC Straße", but not "Straße"
> name="Straße des 17. Juni" - in index "Straße des 17. Juni", "des 17.
> Juni", "17. Juni", "Juni"
> name="Chenin de Pierre Froide" - in index "Chenin de Pierre Froide", "de
> Pierre Froide", "Pierre Froide", "Froide"
>
> We should think like the user of the map. He will not necessarily know
> about splitting street names. He just likes to find the name. And he knows
> the name or at least a part of it. I agree that nobody will search for "des
> 17. Juni", everybody will search for the complete name "Straße des 17.
> Juni" or "17. Juni". But this is nearly impossible to describe which part
> we need and which not.
>
> Another option would be to allow regular expressions in the exclude list,
> but that would require more
> effort (input file instead of single option) and probably much more run
> time.
> I wouldn't do that.
>
> I'd prefer to have a logic which first analyses all strings added by the
> --x-split-name-index option so that
> only those are generated which do not appear more than x % .
> Oh that idea is good, but I'm not sure if it will work. Think about a map
> like a map of the Alps. This map covers a lot of different countries with
> different languages.  I haven't checked it, but I assume that the most
> streets will be in german speaking countries (Germany, Austria,
> Switzerland). How should we compute a value for appearing of strings for
> France?  Or another example: "Straße" is very common in Germany, but if I
> have a map with whole France and a small part of Germany, then "Straße"
> would just get a low value and therefore gets included. So if we would do
> something like that, then we need a value for each country.
> And think about the street names, which nearly every town in Germany has,
> like "Hauptstraße".
> So, I wouldn't do that.
>
>
> Overall: I would prefer an easy to understand rule.
>
> best regards,
> Gert
>
>
> *Gesendet:* Dienstag, 04. April 2017 um 17:13 Uhr
> *Von:* "Gerd Petermann" <GPetermann_muenchen at hotmail.com>
> *An:* "mkgmap-dev at lists.mkgmap.org.uk" <mkgmap-dev at lists.mkgmap.org.uk>
> *Betreff:* [mkgmap-dev] Meaning of option --x-mdr7-excl
> Hi all,
>
> I did not yet document this option because I don't think that it is useful
> as it is implemented now.
> I think it works fine for english speeking countries with road names like
> "Abc Street" and "Xyz Road".
> Using --x-mdr7-excl=Road,Street in combination with --x-split-name-index
> will work fine.
>
> A different picture is a frensh country.
> Let's look at an example. Assume you have options --index and
> --x-split-name-index
> The road name "Chemin de Pierre Froide" is added to the index as
> "Chemin de Pierre Froide"
> and because of --x-split-name-index the following extries are also added:
> "de Pierre Froide"
> "Pierre Froide"
> "Froide"
> Now, would you expect a change if you use option
> --x-mdr7-excl=Chemin,Rue,Aveue ?
> And what would you expect with --x-mdr7-excl=de,du,la ?
>
> With the current implementation there would be no change in output,
> because the
> the check works in this way:
> Build the string that should be added to the index
> Check if that string is in the exclude list, if not, add it to the index.
>
> I might change that like this:
> Build the string that should be added to the index
> Check if the first word in that string is in the exclude list, if not, add
> it to the index.
>
> With this change the option --x-mdr7-excl=Chemin,Rue,Aveue
> would exclude the entry
> "Chemin de Pierre Froide"
> and --x-mdr7-excl=de,du,la would exclude
> "de Pierre Froide"
>
> Another option would be to allow regular expressions in the exclude list,
> but that would require more
> effort (input file instead of single option) and probably much more run
> time.
>
> I'd prefer to have a logic which first analyses all strings added by the
> --x-split-name-index option so that
> only those are generated which do not appear more than x % .
>
> Comments?
>
> Gerd
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-- 
Felix Hartman - Openmtbmap.org & VeloMap.org
Schusterbergweg 32/8
6020 Innsbruck
Austria - Österreich
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