Re: mapping islands of a salt flat
I still do not understand how to do it properly, but the islands have
appeared on the map so perhaps someone else went ahead and fixed it. I
would also like to see a HOWTO or documentation on multi polygon
relationships, the rationale behind them etc so please keep me posted.
On 21 December 2011 21:36, Jim <jfulme1 <at> gmail.com> wrote:
> Was there a resolution for this? I found that it works for me on some
> polygons, not on others.
>
> -----Original Message----- From: Alexandros Papadopoulos
> Sent: Friday, December 02, 2011 7:33 PM
> To: newbies <at> openstreetmap.org
> Subject: Re: [OSM-newbies] mapping islands of a salt flat
>
>
> On 24 November 2011 16:24, Alexandros Papadopoulos
> <alexandros.papadopoulos <at> gmail.com> wrote:
>>
>> On 24 November 2011 15:21, Richard Weait <richard <at> weait.com> wrote:
>>>
>>> On Thu, Nov 24, 2011 at 1:03 PM, Alexandros Papadopoulos
>>> <alexandros.papadopoulos <at> gmail.com> wrote:
>>>>
>>>> On 24 November 2011 13:38, Craig Wallace <craigw84 <at> fastmail.fm> wrote:
>>>>>
>>>>> On 24/11/2011 15:33, Alexandros Papadopoulos wrote:
>>>>>>
>>>>>>
>>>>>> Hello.
>>>>>>
>>>>>> I am mapping the islands of the Salar de Uyuni
>>>>>> (http://osm.org/go/NK_7Jv--) as I found it particularly annoying they
>>>>>> were not on the map when I needed this information.
>>>
>>>
>>> [ ... ]
>>>
>>>>> Islands in inland water need to mapped with multipolygon relations. ie
>>>>> map
>>>>> the island as an area, and add it to a multipolygon relation with role
>>>>> "inner", and add the outline of the lake to the relation with role
>>>>> "outer".
>>>>> I see that Isla Incahuasi is already mapped with a multipolygon
>>>>> relation, so
>>>>> you can add all of the other islands to the same relation, with role
>>>>> inner
>>>>> for each.
>>>>>
>>>>> There is no need to tag the islands with natural=land. It is more
>>>>> useful to
>>>>> tag what is actually there. eg if the island is covered with trees then
>>>>> tag
>>>>> it with natural=wood, or if its a beach tag it as natural=beach etc.
>>>>
>>>>
>>>> Thanks Craig.
>>>>
>>>> So to sum up:
>>>>
>>>> 1. Mark the island as an area.
>>>> 2. Add any useful designations (natural=beach etc)
>>>> 3. Add to multipolygon relation.
>>>>
>>>> I have attempted to do just that for the 20odd islands I can see on
>>>> Bing aerial photography, hope I did the right thing.
>>>
>>>
>>> Almost perfect, Alex.
>>>
>>> As Craig said, once these new polygon islands are added to the
>>> multipolygon relation for the salt flat, you must assign the island a
>>> "role" in the multipolygon relation.
>>>
>>> in potlatch, select the island way
>>> in the advanced tab, double click the relation number to open the
>>> relation dialogue box.
>>> select the members panel in the relations dialogue
>>> add "inner" for the role of the island ways.
>>> then save your changes as usual.
>>
>>
>> Ah, afraid you lost me with "add "inner" for the role of the island ways."
>>
>> From the long list of way IDs I get, how do I know which way is the
>> island I am editing;
>>
>> I see what is in the screenshot "for free", ie this is what comes up
>> without me doing anything more than assigning the island way to the
>> multipolygon relationship.
>>
>> Sorry for omission of special characters in email, Chilean computer I
>> use has funny keyboard layout.
>>
>> A step by step example for one island might hopefully help.
>>
>> Thanks
>>
>> Alex
>
>
> This is still pending and the islands of the Salar de Uyuni remain
> unmapped. Has my previous email with the screenshot from P2 made it to
> the list? Would appreciate some more help to get this over and done
> with.
>
> Cheers
>
> Alex
>
> _______________________________________________
> newbies mailing list
> newbies <at> openstreetmap.org
> http://lists.openstreetmap.org/listinfo/newbies
>
> _______________________________________________
> newbies mailing list
> newbies <at> openstreetmap.org
> http://lists.openstreetmap.org/listinfo/newbies
_______________________________________________
newbies mailing list
newbies <at> openstreetmap.org
http://lists.openstreetmap.org/listinfo/newbies
You
might also consider posting your questions here directly, so that any
reader may reply and try to help.
OSM is big. What do you have in mind for your project? One final
year project can not do everything in OSM.
And what experience do you have already with OSM?
And finally, if this is to be a software project there are many
existing software projects in OSM. Could you consider contributing to
one of those existing projects as your final year work? Many projects
would welcome additional programmers.
Best regards,
Richard
RSS Feed