Re: [HOT] [activation hotosm] Re: Activation. floods in Peru

[Johnattan Rupire]

El 18/03/17 a las 20:40, maning sambale escribió:

Hi everyone,

I can prepare the task in the next couple of hours. Some questions

What specific features to map? Normally, we focus on one or two 
features ie building + road or other combinations this makes it easy 
to map and validate.


waterways
road network
Settlements
buildings



Which imagery to use? Bing or mapbox or others? We usually use a 
single imagery source to minimize misalignment issues but if one 
source is not sufficient we can combine others taking note of their 
alignment issues and date of capture to help temote mappers understand 
the quality of imagery.


In some places Bing is better than Mapbox, in others it's the other way...

than you!

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Re: [HOT] [activation hotosm] Re: Activation. floods in Peru

[maning sambale]

Thanks blake for making the tasks.  I've did the ES translation using
google translate, let me know if its OK.


On 3/19/17, Johnattan Rupire  wrote:
> Here are an archive with polygons for everyone areas afeted by the
> floods in coast of Perú. This week we staart some mapping parties to map
> it. We have a Coordinadora Nacional de Derechos Humanos as parner to
> develop these activities, and they need the maps to colaborate with
> mmitigation in these areas.
>
> Can you tell how we have to do to make official this relation? they have
> to send us an email? or some documents like this?
>
> https://drive.google.com/file/d/0B3xs7-HKTSUuNXpHTVVoV2F3QmM/view?usp=sharing
>
>
> El 18/03/17 a las 13:00, Russell Deffner escribió:
>> Thanks Maning,
>>
>> A few of us are in the telegram chat with the local community; I'll be
>> mostly mobile today, so great to have your help if more projects are
>> needed.
>>
>> =Russ
>>
>> -Original Message-
>> From: maning sambale [mailto:emmanuel.samb...@gmail.com]
>> Sent: Saturday, March 18, 2017 9:15 AM
>> To: Daniel O'Connor
>> Cc: HOT
>> Subject: Re: [HOT] Activation. floods in Peru
>>
>> Hi everyone,
>>
>> Im in Lima at the moment but movement is limited due to the crisis.  I
>> can do a bit of work but my Spanish is limited.
>> At least I can help prepare tasks if local community have defined
>> areas to work on.
>>
>> On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
>>  wrote:
>>> One possible thing that is a little different to some past activations
>>> is
>>> the availability of gps data via improve-osm.org - it might be worth
>>> checking that against flood affected areas to see if it highlights
>>> missing
>>> roads well.
>>>
>>> Additionally, strava's GPS 'slide' tool built into ID may allow some
>>> fast/accurate tracing of any missing roads/cloudy imagery.
>>>
>>> For example:
>>> http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=,
>>>
>>> Obviously neither is going to be 'complete', but may be helpful to
>>> quickly
>>> target areas to map.
>>>
>>> On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
>>> wrote:
 I wrote to activat...@hotosm.org to ask for setup these tasks.
 thanks!


 El 16/03/17 a las 12:12, Johnattan Rupire escribió:

 Wiki is here:

 https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru

 Thanks!

 El 16/03/17 a las 11:47, hyan...@gmail.com escribió:

 To whom it may concern the coordination is in https://t.me/osmPe
 (Telegram) a new wiki is on the go.

 Para aquellos interesados la coordinación es en https://t.me/osmPe
 (Telegram) una nueva wiki está en camino.

 Thanks,

 Humberto Yances

 2017-03-16 11:20 GMT-05:00 Johnattan Rupire :
> Hi!
> In Peru we are experiencing a difficult time due to the impact that is
> causing the floods in the country, especially in the north. This is why
> we
> want to open a task in the Task Manager to call people to the mapping
> of
> areas near Piura.
>
> It would be the first time we have activated an alert of this type
> here,
> Humberto Yances has offered to collaborate with us, so here goes the
> thanks
> and the invitation to other collaborators.
>
> Those who have experience mapping flood events, please also share
> their
> insights, tips or recommendations on how we could get started and how
> best
> to collaborate from the map.
>
> We are looking for contact with the respective authorities here, we
> hope
> to get their attention at some point.
>
> Regards!
>
> Johnattan Rupire
>
>
> ___
> HOT mailing list
> HOT@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/hot




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 ___
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>>>
>>> ___
>>> HOT mailing list
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>>>
>>
>>
>
> --
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>


-- 
cheers,
maning
--
"Freedom is 

Re: [HOT] [activation hotosm] Re: Activation. floods in Peru

[maning sambale]

Hi everyone,

I can prepare the task in the next couple of hours. Some questions

What specific features to map? Normally, we focus on one or two features ie
building + road or other combinations this makes it easy to map and
validate.

Which imagery to use? Bing or mapbox or others? We usually use a single
imagery source to minimize misalignment issues but if one source is not
sufficient we can combine others taking note of their alignment issues and
date of capture to help temote mappers understand the quality of imagery.


On Sat, 18 Mar 2017 at 15:41 Johnattan Rupire  wrote:

> Here are an archive with polygons for everyone areas afeted by the
> floods in coast of Perú. This week we staart some mapping parties to map
> it. We have a Coordinadora Nacional de Derechos Humanos as parner to
> develop these activities, and they need the maps to colaborate with
> mmitigation in these areas.
>
> Can you tell how we have to do to make official this relation? they have
> to send us an email? or some documents like this?
>
>
> https://drive.google.com/file/d/0B3xs7-HKTSUuNXpHTVVoV2F3QmM/view?usp=sharing
>
>
> El 18/03/17 a las 13:00, Russell Deffner escribió:
> > Thanks Maning,
> >
> > A few of us are in the telegram chat with the local community; I'll be
> mostly mobile today, so great to have your help if more projects are needed.
> >
> > =Russ
> >
> > -Original Message-
> > From: maning sambale [mailto:emmanuel.samb...@gmail.com]
> > Sent: Saturday, March 18, 2017 9:15 AM
> > To: Daniel O'Connor
> > Cc: HOT
> > Subject: Re: [HOT] Activation. floods in Peru
> >
> > Hi everyone,
> >
> > Im in Lima at the moment but movement is limited due to the crisis.  I
> > can do a bit of work but my Spanish is limited.
> > At least I can help prepare tasks if local community have defined
> > areas to work on.
> >
> > On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
> >  wrote:
> >> One possible thing that is a little different to some past activations
> is
> >> the availability of gps data via improve-osm.org - it might be worth
> >> checking that against flood affected areas to see if it highlights
> missing
> >> roads well.
> >>
> >> Additionally, strava's GPS 'slide' tool built into ID may allow some
> >> fast/accurate tracing of any missing roads/cloudy imagery.
> >>
> >> For example:
> >>
> http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=
> ,
> >>
> >> Obviously neither is going to be 'complete', but may be helpful to
> quickly
> >> target areas to map.
> >>
> >> On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
> >> wrote:
> >>> I wrote to activat...@hotosm.org to ask for setup these tasks.
> >>> thanks!
> >>>
> >>>
> >>> El 16/03/17 a las 12:12, Johnattan Rupire escribió:
> >>>
> >>> Wiki is here:
> >>>
> >>> https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru
> >>>
> >>> Thanks!
> >>>
> >>> El 16/03/17 a las 11:47, hyan...@gmail.com escribió:
> >>>
> >>> To whom it may concern the coordination is in https://t.me/osmPe
> >>> (Telegram) a new wiki is on the go.
> >>>
> >>> Para aquellos interesados la coordinación es en https://t.me/osmPe
> >>> (Telegram) una nueva wiki está en camino.
> >>>
> >>> Thanks,
> >>>
> >>> Humberto Yances
> >>>
> >>> 2017-03-16 11:20 GMT-05:00 Johnattan Rupire :
>  Hi!
>  In Peru we are experiencing a difficult time due to the impact that is
>  causing the floods in the country, especially in the north. This is
> why we
>  want to open a task in the Task Manager to call people to the mapping
> of
>  areas near Piura.
> 
>  It would be the first time we have activated an alert of this type
> here,
>  Humberto Yances has offered to collaborate with us, so here goes the
> thanks
>  and the invitation to other collaborators.
> 
>  Those who have experience mapping flood events, please also share
> their
>  insights, tips or recommendations on how we could get started and how
> best
>  to collaborate from the map.
> 
>  We are looking for contact with the respective authorities here, we
> hope
>  to get their attention at some point.
> 
>  Regards!
> 
>  Johnattan Rupire
> 
> 
>  ___
>  HOT mailing list
>  HOT@openstreetmap.org
>  https://lists.openstreetmap.org/listinfo/hot
> >>>
> >>>
> >>>
> >>>
> >>> ___
> >>> HOT mailing list
> >>> HOT@openstreetmap.org
> >>> https://lists.openstreetmap.org/listinfo/hot
> >>>
> >>>
> >>>
> >>> ___
> >>> HOT mailing list
> >>> HOT@openstreetmap.org
> >>> https://lists.openstreetmap.org/listinfo/hot
> >>>
> >>
> >> ___
> >> HOT mailing list
> >> HOT@openstreetmap.org
> >> https://lists.openstreetmap.org/listinfo/hot
> >>
> >
> >
>
> --
> You received this 

Re: [HOT] Activation. floods in Peru

[Johnattan Rupire]

Here are an archive with polygons for everyone areas afeted by the 
floods in coast of Perú. This week we staart some mapping parties to map 
it. We have a Coordinadora Nacional de Derechos Humanos as parner to 
develop these activities, and they need the maps to colaborate with 
mmitigation in these areas.


Can you tell how we have to do to make official this relation? they have 
to send us an email? or some documents like this?


https://drive.google.com/file/d/0B3xs7-HKTSUuNXpHTVVoV2F3QmM/view?usp=sharing


El 18/03/17 a las 13:00, Russell Deffner escribió:

Thanks Maning,

A few of us are in the telegram chat with the local community; I'll be mostly 
mobile today, so great to have your help if more projects are needed.

=Russ

-Original Message-
From: maning sambale [mailto:emmanuel.samb...@gmail.com]
Sent: Saturday, March 18, 2017 9:15 AM
To: Daniel O'Connor
Cc: HOT
Subject: Re: [HOT] Activation. floods in Peru

Hi everyone,

Im in Lima at the moment but movement is limited due to the crisis.  I
can do a bit of work but my Spanish is limited.
At least I can help prepare tasks if local community have defined
areas to work on.

On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
 wrote:

One possible thing that is a little different to some past activations is
the availability of gps data via improve-osm.org - it might be worth
checking that against flood affected areas to see if it highlights missing
roads well.

Additionally, strava's GPS 'slide' tool built into ID may allow some
fast/accurate tracing of any missing roads/cloudy imagery.

For example:
http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=,

Obviously neither is going to be 'complete', but may be helpful to quickly
target areas to map.

On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
wrote:

I wrote to activat...@hotosm.org to ask for setup these tasks.
thanks!


El 16/03/17 a las 12:12, Johnattan Rupire escribió:

Wiki is here:

https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru

Thanks!

El 16/03/17 a las 11:47, hyan...@gmail.com escribió:

To whom it may concern the coordination is in https://t.me/osmPe
(Telegram) a new wiki is on the go.

Para aquellos interesados la coordinación es en https://t.me/osmPe
(Telegram) una nueva wiki está en camino.

Thanks,

Humberto Yances

2017-03-16 11:20 GMT-05:00 Johnattan Rupire :

Hi!
In Peru we are experiencing a difficult time due to the impact that is
causing the floods in the country, especially in the north. This is why we
want to open a task in the Task Manager to call people to the mapping of
areas near Piura.

It would be the first time we have activated an alert of this type here,
Humberto Yances has offered to collaborate with us, so here goes the thanks
and the invitation to other collaborators.

Those who have experience mapping flood events, please also share their
insights, tips or recommendations on how we could get started and how best
to collaborate from the map.

We are looking for contact with the respective authorities here, we hope
to get their attention at some point.

Regards!

Johnattan Rupire


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Re: [HOT] Activation. floods in Peru

[Johnattan Rupire]

Hi folk,
we have four geojson to start new tasks, Can some of you help us with 
setup these tasks?


Archives are in our telegram channel. I attached here too.


El 18/03/17 a las 13:00, Russell Deffner escribió:

Thanks Maning,

A few of us are in the telegram chat with the local community; I'll be mostly 
mobile today, so great to have your help if more projects are needed.

=Russ

-Original Message-
From: maning sambale [mailto:emmanuel.samb...@gmail.com]
Sent: Saturday, March 18, 2017 9:15 AM
To: Daniel O'Connor
Cc: HOT
Subject: Re: [HOT] Activation. floods in Peru

Hi everyone,

Im in Lima at the moment but movement is limited due to the crisis.  I
can do a bit of work but my Spanish is limited.
At least I can help prepare tasks if local community have defined
areas to work on.

On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
 wrote:

One possible thing that is a little different to some past activations is
the availability of gps data via improve-osm.org - it might be worth
checking that against flood affected areas to see if it highlights missing
roads well.

Additionally, strava's GPS 'slide' tool built into ID may allow some
fast/accurate tracing of any missing roads/cloudy imagery.

For example:
http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=,

Obviously neither is going to be 'complete', but may be helpful to quickly
target areas to map.

On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
wrote:

I wrote to activat...@hotosm.org to ask for setup these tasks.
thanks!


El 16/03/17 a las 12:12, Johnattan Rupire escribió:

Wiki is here:

https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru

Thanks!

El 16/03/17 a las 11:47, hyan...@gmail.com escribió:

To whom it may concern the coordination is in https://t.me/osmPe
(Telegram) a new wiki is on the go.

Para aquellos interesados la coordinación es en https://t.me/osmPe
(Telegram) una nueva wiki está en camino.

Thanks,

Humberto Yances

2017-03-16 11:20 GMT-05:00 Johnattan Rupire :

Hi!
In Peru we are experiencing a difficult time due to the impact that is
causing the floods in the country, especially in the north. This is why we
want to open a task in the Task Manager to call people to the mapping of
areas near Piura.

It would be the first time we have activated an alert of this type here,
Humberto Yances has offered to collaborate with us, so here goes the thanks
and the invitation to other collaborators.

Those who have experience mapping flood events, please also share their
insights, tips or recommendations on how we could get started and how best
to collaborate from the map.

We are looking for contact with the respective authorities here, we hope
to get their attention at some point.

Regards!

Johnattan Rupire


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{
"type": "FeatureCollection",
"crs": { "type": "name", "properties": { "name": 
"urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "id": null }, "geometry": { "type": 
"Polygon", "coordinates": [ [ [ -71.546023632868511, -16.320392576914351 ], [ 
-71.54574539960629, -16.31276369649505 ], [ -71.544821858230875, 
-16.308121834916992 ], [ -71.550407876266874, -16.305433911636459 ], [ 
-71.548527330030268, -16.302931367720927 ], [ -71.55032843403734, 
-16.294551629586614 ], [ -71.557979952567621, -16.288293596451986 ], [ 
-71.553067367550227, -16.280373660525171 ], [ -71.538041712295609, 
-16.279206255870797 ], [ -71.540248438082102, -16.285500651203311 ], [ 
-71.525459933513389, -16.292437862794014 ], [ -71.517681780997592, 
-16.281206811708461 ], [ -71.50546373884832, -16.286910541981886 ], [ 
-71.506865809258869, -16.298317504553392 ], [ -71.508735236472972, 
-16.315875239103988 ], [ -71.520552687076403, -16.325582579923474 ], [ 
-71.525760377172816, -16.325069994059103 ], [ -71.529549305544265, 
-16.328930380747227 ], [ -71.541183151689154, -16.321706109474302 ], [ 
-71.546023632868511, -16.320392576914351 ] ] ] } }
]
}
{
"type": "FeatureCollection",
"crs": { "type": "name", "properties": { "name": 
"urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "id": null }, "geometry": { "type": 
"Polygon", "coordinates": [ [ [ -71.487535888174634, -16.537361792781574 ], [ 
-71.489983172919267, -16.531877441455489 ], [ -71.489535007530293, 
-16.525007283519749 ], [ -71.49326523871153, -16.52420803238428 ], [ 
-71.492832323769335, 

Re: [HOT] Activation. floods in Peru

[Russell Deffner]

Thanks Maning,

A few of us are in the telegram chat with the local community; I'll be mostly 
mobile today, so great to have your help if more projects are needed.

=Russ

-Original Message-
From: maning sambale [mailto:emmanuel.samb...@gmail.com] 
Sent: Saturday, March 18, 2017 9:15 AM
To: Daniel O'Connor
Cc: HOT
Subject: Re: [HOT] Activation. floods in Peru

Hi everyone,

Im in Lima at the moment but movement is limited due to the crisis.  I
can do a bit of work but my Spanish is limited.
At least I can help prepare tasks if local community have defined
areas to work on.

On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
 wrote:
> One possible thing that is a little different to some past activations is
> the availability of gps data via improve-osm.org - it might be worth
> checking that against flood affected areas to see if it highlights missing
> roads well.
>
> Additionally, strava's GPS 'slide' tool built into ID may allow some
> fast/accurate tracing of any missing roads/cloudy imagery.
>
> For example:
> http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=,
>
> Obviously neither is going to be 'complete', but may be helpful to quickly
> target areas to map.
>
> On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
> wrote:
>>
>> I wrote to activat...@hotosm.org to ask for setup these tasks.
>> thanks!
>>
>>
>> El 16/03/17 a las 12:12, Johnattan Rupire escribió:
>>
>> Wiki is here:
>>
>> https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru
>>
>> Thanks!
>>
>> El 16/03/17 a las 11:47, hyan...@gmail.com escribió:
>>
>> To whom it may concern the coordination is in https://t.me/osmPe
>> (Telegram) a new wiki is on the go.
>>
>> Para aquellos interesados la coordinación es en https://t.me/osmPe
>> (Telegram) una nueva wiki está en camino.
>>
>> Thanks,
>>
>> Humberto Yances
>>
>> 2017-03-16 11:20 GMT-05:00 Johnattan Rupire :
>>>
>>> Hi!
>>> In Peru we are experiencing a difficult time due to the impact that is
>>> causing the floods in the country, especially in the north. This is why we
>>> want to open a task in the Task Manager to call people to the mapping of
>>> areas near Piura.
>>>
>>> It would be the first time we have activated an alert of this type here,
>>> Humberto Yances has offered to collaborate with us, so here goes the thanks
>>> and the invitation to other collaborators.
>>>
>>> Those who have experience mapping flood events, please also share their
>>> insights, tips or recommendations on how we could get started and how best
>>> to collaborate from the map.
>>>
>>> We are looking for contact with the respective authorities here, we hope
>>> to get their attention at some point.
>>>
>>> Regards!
>>>
>>> Johnattan Rupire
>>>
>>>
>>> ___
>>> HOT mailing list
>>> HOT@openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/hot
>>
>>
>>
>>
>>
>> ___
>> HOT mailing list
>> HOT@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/hot
>>
>>
>>
>> ___
>> HOT mailing list
>> HOT@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/hot
>>
>
>
> ___
> HOT mailing list
> HOT@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/hot
>



-- 
cheers,
maning
--
"Freedom is still the most radical idea of all" -N.Branden
https://epsg4253.wordpress.com/
http://twitter.com/maningsambale
--

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Re: [HOT] Broken (multi)polygon cleanup

[john whelan]

I think you mean tile but the idea has merit.

Thanks John

On 18 March 2017 at 12:43, Coast Limit  wrote:

> I know this discussion is focused on cleaning up these issues, but — as a
> relatively new mapper — can I make a suggestion on how we might better
> limit mistakes in the first place?
>
> John Whelan said earlier, "What I have noticed is one mapper will misstag
> then others will follow.” I think this is true, and likely goes beyond
> tagging — I suspect new mappers are looking for frames of reference to
> judge their own work by, and end up just mimicking one another’s poor
> mapping methods. This is one way we might be getting “experienced” mappers
> (i.e., thousands of edits) who are still adding a lot of problems to the
> map.
>
> My suggestion:
>
> It would be nice if HOT projects started with a single task already mapped
> and completed by experienced mappers, and approved by the project manager,
> as a “reference task” for the project. Highlight it with a unique color.
>
> That way new mappers have an authoritative reference point for that task —
> they can see which imagery it should be aligned with, the level of road
> detail expected, the different types of tags attached to areas, which
> people they might message with questions, etc.
>
> It would give motivated new mappers something trustworthy to mimic.
>
> Thanks,
>
> CoastLimit
>
>
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Re: [HOT] Activation. floods in Peru

[maning sambale]

Hi everyone,

Im in Lima at the moment but movement is limited due to the crisis.  I
can do a bit of work but my Spanish is limited.
At least I can help prepare tasks if local community have defined
areas to work on.

On Fri, Mar 17, 2017 at 9:38 AM, Daniel O'Connor
 wrote:
> One possible thing that is a little different to some past activations is
> the availability of gps data via improve-osm.org - it might be worth
> checking that against flood affected areas to see if it highlights missing
> roads well.
>
> Additionally, strava's GPS 'slide' tool built into ID may allow some
> fast/accurate tracing of any missing roads/cloudy imagery.
>
> For example:
> http://strava.github.io/iD/#background=Bing=16.23/-77.23724/-11.13873=,
>
> Obviously neither is going to be 'complete', but may be helpful to quickly
> target areas to map.
>
> On Fri, Mar 17, 2017 at 9:41 AM, Johnattan Rupire 
> wrote:
>>
>> I wrote to activat...@hotosm.org to ask for setup these tasks.
>> thanks!
>>
>>
>> El 16/03/17 a las 12:12, Johnattan Rupire escribió:
>>
>> Wiki is here:
>>
>> https://wiki.openstreetmap.org/wiki/2017_Floods_in_Peru
>>
>> Thanks!
>>
>> El 16/03/17 a las 11:47, hyan...@gmail.com escribió:
>>
>> To whom it may concern the coordination is in https://t.me/osmPe
>> (Telegram) a new wiki is on the go.
>>
>> Para aquellos interesados la coordinación es en https://t.me/osmPe
>> (Telegram) una nueva wiki está en camino.
>>
>> Thanks,
>>
>> Humberto Yances
>>
>> 2017-03-16 11:20 GMT-05:00 Johnattan Rupire :
>>>
>>> Hi!
>>> In Peru we are experiencing a difficult time due to the impact that is
>>> causing the floods in the country, especially in the north. This is why we
>>> want to open a task in the Task Manager to call people to the mapping of
>>> areas near Piura.
>>>
>>> It would be the first time we have activated an alert of this type here,
>>> Humberto Yances has offered to collaborate with us, so here goes the thanks
>>> and the invitation to other collaborators.
>>>
>>> Those who have experience mapping flood events, please also share their
>>> insights, tips or recommendations on how we could get started and how best
>>> to collaborate from the map.
>>>
>>> We are looking for contact with the respective authorities here, we hope
>>> to get their attention at some point.
>>>
>>> Regards!
>>>
>>> Johnattan Rupire
>>>
>>>
>>> ___
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>>
>>
>>
>>
>>
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>
>
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>



-- 
cheers,
maning
--
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http://twitter.com/maningsambale
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Re: [HOT] Broken (multi)polygon cleanup

[Michael Heißmeier]

Hi all,

Jochen Topf, 2017-03-18 11:20:

On Fri, Mar 17, 2017 at 10:48:00AM -0400, john whelan wrote:

I've read it through but remember like many mappers I do not have a Ph.D.
in GIS, just a degree in Chemistry so I'm usually not too bad on logic.

The first thing that stands out is the message is too complex for the
intended audience.

Yes, and no. The documentation we have now is trying to be complete and
thorough. The intended audience are, first, power mappers. I am totally
aware that it is too much for the average mapper, but that's why I need
everybodies help not only the fix things, but also to translate the
problem into words that the different audiences can understand.

I know that HOT has capable mappers that understand OSM well and have
written documentation for new HOT mappers to use. I hope I can reach
those people here so they can help.


The second "The *new style* tagging option is the recommended tagging
option these days, but some mappers still disagree."  So we don't have
complete agreement, fine.

Well, that was me being overcautious. I haven't heard any disagreements
in the last months. So I don't think there is any major disagreements
left. I have removed that sentence from the documentation.


The third is the main problem areas seem to be some rendering systems
prefer one method over the other.  "Are we mapping for a specific rendering
system now?"

No, we are not. I am not sure why you got that impression from the
documentation. Can you point me to a specific sentence? I have
highlighted Osm2pgsql, because it is by far the most often used basis
for rendering maps and it is what powers the main OSM map. So changes
there will affect more people. And it also means that basically every
other system is trying to mimic what Osm2pgsql is doing (right or
wrong), because they have to keep "in sync" with the main map that OSM
mappers use to verify their work.

Currently all rendering systems have to handle old- and new-style
multipolygons and in the future they wont have to do that any more. This
makes all systems simpler.


I suspect if we concentrate on unclosed ways and duplicate segments then
this is something that can be done without a Ph.D. in GIS concepts and
there is no disagreement.  Leave the more complex problem solving to others.

I totally agree. That's why I have been splitting up the work into small
Maproulette tasks, each with a very easy to understand and concrete
description of what the fixing task is. I don't expect most mappers to
be able to solve complex multipolygon cases. But there are plenty of
simple cases around.


I gave the Maproulette tasks a try yesterday evening and found them easy to 
tackle. The advantage here is that they are typically localized to a small area, 
you do not have to take lots of data into account.


For the bigger picture, OSM Inspector is the tool of choice but I agree that 
many errors reported here are not easy to fix.
I will try to get an overview of errors made by relatively new contributors and 
see how we can improve documentation and learning materials. Errors made are not 
always what you think of when writing documentation, cf. this "single" building 
which contains self-intersections:




Not to forget the biggest multipolygon of all (although not technically 
organized as one), the coastline, which is more often broken than not.





I would recommend if you wish to use the resources of HOT that you talk
nicely to the HOT training group and see if they can sort out the message
and what training needs to be given to support these efforts including what
you would like mappers to avoid when mapping.

I am hoping these people are listening here. (Are you?) Or do I have to
go somewhere else to talk to them?


Yes, people active in the Training Working Group are listening here as well. We 
are aware that new mappers need guidance and made substantial improvements over 
the past months. Out chair, Nick Allen, mentioned this last month in his e-mail 
to the hot list 
(http://lists.openstreetmap.org/pipermail/hot/2017-February/012977.html). We are 
always open to suggestions for further material to be included there.


Best Regards

/Michael
(osm:michael63)
//

/PS: John,

I have yet to see a HOT project that asks mappers to map country outlines.

I agree that these are rare but they do exist 
(http://tasks.hotosm.org/project/1407)


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Re: [HOT] Broken (multi)polygon cleanup

[Jochen Topf]

On Fri, Mar 17, 2017 at 10:48:00AM -0400, john whelan wrote:
> I've read it through but remember like many mappers I do not have a Ph.D.
> in GIS, just a degree in Chemistry so I'm usually not too bad on logic.
> 
> The first thing that stands out is the message is too complex for the
> intended audience.

Yes, and no. The documentation we have now is trying to be complete and
thorough. The intended audience are, first, power mappers. I am totally
aware that it is too much for the average mapper, but that's why I need
everybodies help not only the fix things, but also to translate the
problem into words that the different audiences can understand.

I know that HOT has capable mappers that understand OSM well and have
written documentation for new HOT mappers to use. I hope I can reach
those people here so they can help.

> The second "The *new style* tagging option is the recommended tagging
> option these days, but some mappers still disagree."  So we don't have
> complete agreement, fine.

Well, that was me being overcautious. I haven't heard any disagreements
in the last months. So I don't think there is any major disagreements
left. I have removed that sentence from the documentation.

> The third is the main problem areas seem to be some rendering systems
> prefer one method over the other.  "Are we mapping for a specific rendering
> system now?"

No, we are not. I am not sure why you got that impression from the
documentation. Can you point me to a specific sentence? I have
highlighted Osm2pgsql, because it is by far the most often used basis
for rendering maps and it is what powers the main OSM map. So changes
there will affect more people. And it also means that basically every
other system is trying to mimic what Osm2pgsql is doing (right or
wrong), because they have to keep "in sync" with the main map that OSM
mappers use to verify their work.

Currently all rendering systems have to handle old- and new-style
multipolygons and in the future they wont have to do that any more. This
makes all systems simpler.

> I suspect if we concentrate on unclosed ways and duplicate segments then
> this is something that can be done without a Ph.D. in GIS concepts and
> there is no disagreement.  Leave the more complex problem solving to others.

I totally agree. That's why I have been splitting up the work into small
Maproulette tasks, each with a very easy to understand and concrete
description of what the fixing task is. I don't expect most mappers to
be able to solve complex multipolygon cases. But there are plenty of
simple cases around.

> I would recommend if you wish to use the resources of HOT that you talk
> nicely to the HOT training group and see if they can sort out the message
> and what training needs to be given to support these efforts including what
> you would like mappers to avoid when mapping.

I am hoping these people are listening here. (Are you?) Or do I have to
go somewhere else to talk to them?

Jochen
-- 
Jochen Topf  joc...@remote.org  https://www.jochentopf.com/  +49-351-31778688

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