[mkgmap-dev] Resolutions...

Fri Mar 13 14:51:22 GMT 2020

Hi Gerd

Thanks for your reply

Yes, I noticed that level 2-4 is allowed as well.

Just going back  to an earlier problem,

using the default levels

levels = 0:24, 1:22, 2:20, 3:18

overview-levels = 4:17, 5:16, 6:15, 7:14, 8:12

a) I'm still a bit unclear about what happens if a resolution

a) slots in between two levels , ie resolution 19 will between levels 2 
and 3

Will if always get rounded down or does it depend on the nearest level

ie

levels = 0:24, 1:22, 2:20, 3:15

resolution 17 will be plotted as level 3 ?

resolution 19 will be plotted as level 2 ?

B) the default style's lowest resolution is 10 in Polygons

and yet its is lower than level 8 in which case its rounded up to level 8

or does it automatically get assgined a new undeclared level 9?

Just realised 4b must get hard coded to the lowest level (0 ?)

Regards

Nick

On 13/03/2020 13:43, Gerd Petermann wrote:
> Hi Nick,
> a)
> natural=wood [0x50 level 2-4 ]
> is allowed.
> b)
> a level larger than specified in levels gives an error message. For your example I'd expect
> Error in style: Error: Level number too large, max=5
> Not sure if that makes sense. For your example I would have expected that
> area_city=*   [0x03 level 6 continue]
> is treated like
> area_city=*   [0x03 level 0-5 continue]
>
> Gerd
>
> ________________________________________
> Von: Pinns UK <osm at pinns.co.uk>
> Gesendet: Mittwoch, 11. März 2020 09:01
> An: Gerd Petermann; mkgmap-dev at lists.mkgmap.org.uk
> Betreff: Re: AW: [mkgmap-dev] Resolutions...
>
> Hi Gerd
>
> Thanks that's clear.
>
> I'm just experimenting with the default style rather than my own which
> is entirely geared towards hiking.
>
> I can see there is some advantage using levels:
>
> a)  you get a clearer picture of which elements get plotted at which
> zoom level
>
> b) you only have to change the resolutions in the options file to test
> the zooming effects.
>
> btw
>
> a) Can you use the '--' in levels?
>
> ie
>
> natural=wood [0x50 level 2-4 ]
>
> b) I have seen an options file which contains levels 0 --> 5
>
> However in the style itself there is mention of a level 6 eventhough
> it's not defined in tghe options file
>
> ie
>
> area_city=*   [0x03 level 6 continue]
>
> Is that 'allowed' ?
>
> Regards
>
> Nick
>
> On 11/03/2020 06:56, Gerd Petermann wrote:
>> Hi Nick,
>>
>> The behaviour changed in the past, but I think if the style produces an object for a max resolution X and no level covers exactly this resolution the max resolution is decremented to the next lower value covered by a level. If there is no such level the object is not added to the map.
>>
>> natural=coastline [0x15 resolution 12]
>> is equal to
>> natural=coastline [0x15 resolution 12-24]
>>
>> Not sure what you mean with
>> "I remember in the past it was said the levels are better than resolutions"
>> Do you suggest to change the default style to use level instead of resolution?
>>
>> Gerd
>>
>> ________________________________________
>> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Pinns UK <osm at pinns.co.uk>
>> Gesendet: Dienstag, 10. März 2020 18:30
>> An: mkgmap-dev at lists.mkgmap.org.uk
>> Betreff: Re: [mkgmap-dev] Resolutions...
>>
>> Hi Gerd
>>
>> Just to be a nuisance:
>>
>> If there is no level beyond level 3 in the default style, ie 4,12
>>
>> then all resolutions <18  contained in the default style (and there are
>> quite a few!)  only get plotted at level 3?
>>
>> ie the lowest lines are a boundary  and    a coastline , both at res 12
>>
>> Do they only get plotted at level 3 , ie resolution 3
>>
>> I remember in the past it was said the levels are better than resolutions
>>
>> R
>>
>> Nick
>>
>> On 10/03/2020 13:46, Pinns UK wrote:
>>> Thanks Gerd
>>>
>>> r
>>>
>>> Nick
>>>
>>> On 10/03/2020 12:51, Gerd Petermann wrote:
>>>> Hi Nick,
>>>>
>>>> the meaning of these statements depends on the levels option. With
>>>> the options in default style
>>>> levels = 0:24, 1:22, 2:20, 3:18
>>>> the resolution 23 and 22 are at level 1, so resolution  23 is
>>>> actually rounded down to 22.
>>>>
>>>> Gerd
>>>>
>>>> ________________________________________
>>>> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
>>>> von nwillink <osm at pinns.co.uk>
>>>> Gesendet: Dienstag, 10. März 2020 13:39
>>>> An: mkgmap-dev at lists.mkgmap.org.uk
>>>> Betreff: [mkgmap-dev] Resolutions...
>>>>
>>>> Hi
>>>>
>>>> Can anyone tell me what exactly the '-' in after resolutions means.
>>>>
>>>> I plotted a church resolution 21-23  only to find it does not include
>>>> resolution 23.
>>>>
>>>> Somewhere I read that only the resolutions between the numbers are
>>>> plotted.
>>>>
>>>> If that is the case what does 23-24 mean ? What resolution is there
>>>> between
>>>> 23 and 24
>>>>
>>>> What happens with resolution 23-23 ?
>>>>
>>>> Does 23-24 mean only level 23
>>>> Is 24-23 different from 23-24?
>>>>
>>>> The manual does not seem to tackle this issue.
>>>>
>>>> btw
>>>>
>>>> Have noticed that Basecamp/Mapsource only plots 0x2c poi range at
>>>> level 24
>>>>
>>>> So the following might never occur in some GPS devices is except at
>>>> resolution 24
>>>>
>>>> 0x2c02 [resolution 21 ]
>>>>
>>>> This seems to affect :
>>>>
>>>> viewpoints,churches,castles, schools,amusement parks etc
>>>>
>>>> Regards
>>>>
>>>> Nick
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Sent from:
>>>> http://gis.19327.n8.nabble.com/Mkgmap-Development-f5324443.html
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