Question on Nepal helicopter landing sites mapping

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Question on Nepal helicopter landing sites mapping

Sérgio V.
Hi Michael, I do this: as instructions say, circular "aeroway=helipads" only if found the circular mark on ground with the "H". For the other "possible" landing areas as said in instructions, in hilly areas I try to find the higher and larger, clear but not too far from village. Also with some support of helicopters websites as quoted, Helicopters like Chinook may need wider area, but smaller helipoters can land on smaller areas. It depends on conditions that we can't decide from satellite. What we can do is to mark the best area as instructilons say, but specialists and pilots will choose. Close to major river beds it may be easier to find, since there it can be flat farmland areas (possibly rice). I try to mark the shape for these alternative areas: if it was previously marked as farmland, I add a new poligon (not sharing nodes) for leisure=common (if these areas will be searched by querry for "common", it's easier to find). I try to draw the shape of what I can see clean, avoiding visible objects (rocks, scrub, trees, walls).  For example if it's a strip of 30x100m, i'd rather draw this way, because it's better to indicate possible aproaching direction. Recently I prefer to mark some 2 of these areas in some villages, when it's possible, because anyway, this don't mean pilots "must" land there, but they can choose on visual contact. Regards, Sérgio (user:SergioAJV)

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Re: Question on Nepal helicopter landing sites mapping

Michael Krämer-2
Hi Milo and Sérgio,

thank you both very much for your feedback. I think you gave perfect
examples of the two different approaches that I
came across:

Am 03.05.2015 um 17:35 schrieb S Volk:
> For the other "possible" landing areas as said in instructions, in
> hilly areas I try to find the higher and larger, clear but not too
> far from village. Also with some support of helicopters websites as
> quoted, Helicopters like Chinook may need wider area, but smaller
> helipoters can land on smaller areas. It depends on conditions that
> we can't decide from satellite.

Am 03.05.2015 um 17:10 schrieb Milo van der Linden:
> I have been mapping "aeroway=helipad" in the following way:
>
> 1. In JOSM, I draw a line 30m in diameter.
 > 2. Then I use "Create Circle" and add "aeroway=helipad"
 > 3. If it doesn't fit in the area  where I drew the line, I use
 > "Copy" and delete the circle.
> 4. I then move accross the map seeking potential spots. Once I see
> one, I press "Paste" to see if the 30m diameter circle fits. If it
 > does, I leave it there or move it slightly to fit.

So one approach is to have "leisure=common" areas adjusted to the local
situation. The other approach is to have circles tagged with
"aeroway=helipad".

Since the two approaches are pretty different I really would like to
know which one is the preferred one. Once this is sorted out we probably
shoud align the mapping & tagging for easier extraction and processing.

Thanks,
Michael

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Re: Question on Nepal helicopter landing sites mapping

Tom Taylor-2
I would go with Milo's approach. Leave "aeroway=helipad" for the
official sites.

Tom Taylor
TomT5454

On 03/05/2015 11:53 AM, Michael Krämer wrote:

> Hi Milo and Sérgio,
>
> thank you both very much for your feedback. I think you gave perfect
> examples of the two different approaches that I
> came across:
>
> Am 03.05.2015 um 17:35 schrieb S Volk:
>> For the other "possible" landing areas as said in instructions, in
>> hilly areas I try to find the higher and larger, clear but not too
>> far from village. Also with some support of helicopters websites as
>> quoted, Helicopters like Chinook may need wider area, but smaller
>> helipoters can land on smaller areas. It depends on conditions that
>> we can't decide from satellite.
>
> Am 03.05.2015 um 17:10 schrieb Milo van der Linden:
>> I have been mapping "aeroway=helipad" in the following way:
>>
>> 1. In JOSM, I draw a line 30m in diameter.
>  > 2. Then I use "Create Circle" and add "aeroway=helipad"
>  > 3. If it doesn't fit in the area  where I drew the line, I use
>  > "Copy" and delete the circle.
>> 4. I then move accross the map seeking potential spots. Once I see
>> one, I press "Paste" to see if the 30m diameter circle fits. If it
>  > does, I leave it there or move it slightly to fit.
>
> So one approach is to have "leisure=common" areas adjusted to the local
> situation. The other approach is to have circles tagged with
> "aeroway=helipad".
>
> Since the two approaches are pretty different I really would like to
> know which one is the preferred one. Once this is sorted out we probably
> shoud align the mapping & tagging for easier extraction and processing.
>
> Thanks,
> Michael
>
> _______________________________________________
> HOT mailing list
> [hidden email]
> https://lists.openstreetmap.org/listinfo/hot

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Re: Question on Nepal helicopter landing sites mapping

Tom Taylor-2
I got that reversed. It was S Volk's approach I support.

Tom Taylor

On 03/05/2015 1:10 PM, Tom Taylor wrote:

> I would go with Milo's approach. Leave "aeroway=helipad" for the
> official sites.
>
> Tom Taylor
> TomT5454
>
> On 03/05/2015 11:53 AM, Michael Krämer wrote:
>> Hi Milo and Sérgio,
>>
>> thank you both very much for your feedback. I think you gave perfect
>> examples of the two different approaches that I
>> came across:
>>
>> Am 03.05.2015 um 17:35 schrieb S Volk:
>>> For the other "possible" landing areas as said in instructions, in
>>> hilly areas I try to find the higher and larger, clear but not too
>>> far from village. Also with some support of helicopters websites as
>>> quoted, Helicopters like Chinook may need wider area, but smaller
>>> helipoters can land on smaller areas. It depends on conditions that
>>> we can't decide from satellite.
>>
>> Am 03.05.2015 um 17:10 schrieb Milo van der Linden:
>>> I have been mapping "aeroway=helipad" in the following way:
>>>
>>> 1. In JOSM, I draw a line 30m in diameter.
>>  > 2. Then I use "Create Circle" and add "aeroway=helipad"
>>  > 3. If it doesn't fit in the area  where I drew the line, I use
>>  > "Copy" and delete the circle.
>>> 4. I then move accross the map seeking potential spots. Once I see
>>> one, I press "Paste" to see if the 30m diameter circle fits. If it
>>  > does, I leave it there or move it slightly to fit.
>>
>> So one approach is to have "leisure=common" areas adjusted to the local
>> situation. The other approach is to have circles tagged with
>> "aeroway=helipad".
>>
>> Since the two approaches are pretty different I really would like to
>> know which one is the preferred one. Once this is sorted out we probably
>> shoud align the mapping & tagging for easier extraction and processing.
>>
>> Thanks,
>> Michael
>>
>> _______________________________________________
>> HOT mailing list
>> [hidden email]
>> https://lists.openstreetmap.org/listinfo/hot

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Re: Question on Nepal helicopter landing sites mapping

pierzen
In reply to this post by Tom Taylor-2
Yes please only for official sites. We have to be careful to not indicate as an helipad if no official sign. In such cases, we use as a convention, leisure = common. The GIS specialists can then extract the info and analyze.
regard
 
Pierre


De : Tom Taylor <[hidden email]>
À : [hidden email]
Envoyé le : Dimanche 3 mai 2015 13h10
Objet : Re: [HOT] Question on Nepal helicopter landing sites mapping

I would go with Milo's approach. Leave "aeroway=helipad" for the
official sites.

Tom Taylor
TomT5454

On 03/05/2015 11:53 AM, Michael Krämer wrote:

> Hi Milo and Sérgio,
>
> thank you both very much for your feedback. I think you gave perfect
> examples of the two different approaches that I
> came across:
>
> Am 03.05.2015 um 17:35 schrieb S Volk:
>> For the other "possible" landing areas as said in instructions, in
>> hilly areas I try to find the higher and larger, clear but not too
>> far from village. Also with some support of helicopters websites as
>> quoted, Helicopters like Chinook may need wider area, but smaller
>> helipoters can land on smaller areas. It depends on conditions that
>> we can't decide from satellite.
>
> Am 03.05.2015 um 17:10 schrieb Milo van der Linden:
>> I have been mapping "aeroway=helipad" in the following way:
>>
>> 1. In JOSM, I draw a line 30m in diameter.
>  > 2. Then I use "Create Circle" and add "aeroway=helipad"
>  > 3. If it doesn't fit in the area  where I drew the line, I use
>  > "Copy" and delete the circle.
>> 4. I then move accross the map seeking potential spots. Once I see
>> one, I press "Paste" to see if the 30m diameter circle fits. If it
>  > does, I leave it there or move it slightly to fit.
>
> So one approach is to have "leisure=common" areas adjusted to the local
> situation. The other approach is to have circles tagged with
> "aeroway=helipad".
>
> Since the two approaches are pretty different I really would like to
> know which one is the preferred one. Once this is sorted out we probably
> shoud align the mapping & tagging for easier extraction and processing.
>
> Thanks,
> Michael
>
> _______________________________________________
> HOT mailing list
> [hidden email]
> https://lists.openstreetmap.org/listinfo/hot



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Re: Question on Nepal helicopter landing sites mapping

Michael Krämer-2
Am 03.05.2015 um 19:50 schrieb Pierre Béland:
> Yes please only for official sites. We have to be careful to not
> indicate as an helipad if no official sign. In such cases, we use as
> a convention, leisure = common. The GIS specialists can then extract
> the info and analyze.

Pierre, thanks a lot for the clarification on this!

I also want to add to that: Please map potential landing sites
(leisure=common) with an area of the actual shape. This should be
helpful to analyze the sites. Basically only map circles if there
actually is a circle on the ground.

Thanks,
        Michael (user Ohr)

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