Re: [Talk-GB] Latest OS Opendata

2017-08-16 Thread Chris Hill 
I've added the Natural England dataset that shows CRoW Access land for 
England. The polygons were extracted from large multipolygons (ten 
covered all of England) so they have no individual metadata, such as a 
name.


I've now called the overlay openover to reflect that it's not just OS 
Greenspace. I intend to add some information to explain what is being 
shown and where it comes from, thanks to a helpful comment from Ed Loach.


See the latest here: https://raggedred.net/openover

--
cheers
Chris Hill (chillly)


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Re: [Talk-GB] Latest OS Opendata

2017-08-14 Thread Chris Hill 


On 09/08/2017 22:38, Robert Whittaker (OSM lists) wrote:

On 9 August 2017 at 18:13, Chris Hill  wrote:

I have a rather strange explanation as to why Forestry Commission land is
not shown on the OS Open Greenspace dataset. OS Customer Services have
explained that they can't distinguish what woodland is Forestry Commission
from aerial imagery nor can they determine what the access is from such
imagery. This seems ridiculous but that is their answer.

I suspect that producing the Green Space map was forced upon OS by
politicians, so they've just taken whatever existing datasets they
have, and looked for polygon features that map to "Green Space" and
exported them. (Hence the odd choice to include Golf Courses, which
are mostly private.) Around me, the OS Green Space coverage is
particularly poor with a lot of the public green space in my town
missing. Much of the missing land in the town is owned by the District
Council, but there are also bits that are CRoW Access Land and
registered commons, which I'd have thought OS should know about. And
then there's the whole of Thetford Forest missing!


I think it still has some value as it stands.

Definitively. I've already found a couple of play areas hidden in
housing estates that I didn't know existed, that I'll need to go a
survey.

The killer feature would be doing a comparison with the OSM data and
showing discrepancies -- though that's much easier said than done!


Any more feedback will always be welcome.

Would you consider adding the CRoW Access Land as an additional layer?
(You can get the data under the OGL from
http://environment.data.gov.uk/ds/catalogue/#/catalogue under the
heading "CRoW Act 2000 - Access Layer".

If you're interested in adding even more datasets, the National Trust
has OGL data of it's "always open" land at
http://uk-nationaltrust.opendata.arcgis.com/datasets/202ec400dfe9471aaf257e4b6c956394_0
, and the Forestry Commission make their Public Forest Estate
boundaries available under the OGL at
http://data-forestry.opendata.arcgis.com/datasets/national-forest-estate-legal-boundary-england-2016/
and/or 
http://data-forestry.opendata.arcgis.com/datasets/national-forest-estate-ownership-england-2016
(though there isn't public access to all of it). In both of these
datasets there will be overlap with the CRoW Access Land.

Robert,

Thanks for the ideas. As it was, it was put together quickly and wasn't 
very flexible. I have reorganised the way this works, though it looks 
about the same. This will make it a bit more responsive and easier to 
extend. I'll look at adding some more datasets. Every dataset is 
individual so needs to be handled in it's own way.


--
cheers
Chris Hill (chillly)


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Re: [Talk-GB] Latest OS Opendata

2017-08-09 Thread Robert Whittaker (OSM lists) 
On 9 August 2017 at 18:13, Chris Hill  wrote:
> I have a rather strange explanation as to why Forestry Commission land is
> not shown on the OS Open Greenspace dataset. OS Customer Services have
> explained that they can't distinguish what woodland is Forestry Commission
> from aerial imagery nor can they determine what the access is from such
> imagery. This seems ridiculous but that is their answer.

I suspect that producing the Green Space map was forced upon OS by
politicians, so they've just taken whatever existing datasets they
have, and looked for polygon features that map to "Green Space" and
exported them. (Hence the odd choice to include Golf Courses, which
are mostly private.) Around me, the OS Green Space coverage is
particularly poor with a lot of the public green space in my town
missing. Much of the missing land in the town is owned by the District
Council, but there are also bits that are CRoW Access Land and
registered commons, which I'd have thought OS should know about. And
then there's the whole of Thetford Forest missing!

> I think it still has some value as it stands.

Definitively. I've already found a couple of play areas hidden in
housing estates that I didn't know existed, that I'll need to go a
survey.

The killer feature would be doing a comparison with the OSM data and
showing discrepancies -- though that's much easier said than done!

> Any more feedback will always be welcome.

Would you consider adding the CRoW Access Land as an additional layer?
(You can get the data under the OGL from
http://environment.data.gov.uk/ds/catalogue/#/catalogue under the
heading "CRoW Act 2000 - Access Layer".

If you're interested in adding even more datasets, the National Trust
has OGL data of it's "always open" land at
http://uk-nationaltrust.opendata.arcgis.com/datasets/202ec400dfe9471aaf257e4b6c956394_0
, and the Forestry Commission make their Public Forest Estate
boundaries available under the OGL at
http://data-forestry.opendata.arcgis.com/datasets/national-forest-estate-legal-boundary-england-2016/
and/or 
http://data-forestry.opendata.arcgis.com/datasets/national-forest-estate-ownership-england-2016
(though there isn't public access to all of it). In both of these
datasets there will be overlap with the CRoW Access Land.

Robert,

-- 
Robert Whittaker

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Re: [Talk-GB] Latest OS Opendata

2017-08-09 Thread Chris Hill 
I have a rather strange explanation as to why Forestry Commission land 
is not shown on the OS Open Greenspace dataset. OS Customer Services 
have explained that they can't distinguish what woodland is Forestry 
Commission from aerial imagery nor can they determine what the access is 
from such imagery. This seems ridiculous but that is their answer.


I have updated the overlay [1] to change the colours, though I left the 
outline red to help them stand out. I've added a layer selector and 
turned the overlay off for low zoom levels (<12) to make scrolling work 
better. I fixed a bug and remembered to add the OS attribution this time 
too.


I think it still has some value as it stands.

Any more feedback will always be welcome.

Cheers, Chris (chillly)

[1] https://raggedred.net/greenspace


On 09/08/2017 10:16, Andy Robinson wrote:

Chris,

I guess the bit of interest is the 90% of Public Forest Estate that the 
Forestry Commission dedicated right of access.
https://www.forestry.gov.uk/forestry/infd-7rufp5#access

Cheers
Andy

-Original Message-
From: Chris Hill [mailto:o...@raggedred.net]
Sent: 08 August 2017 20:08
To: Andy Robinson; 'OSM Talk GB'
Subject: Re: [Talk-GB] Latest OS Opendata

Thanks Andy,

I've asked OS about Forestry Commission land, let's see what they say.

Cheers, Chris (chillly)


On 08/08/2017 09:37, Andy Robinson wrote:

Nice work Chris. As you say it does contain some privately owned space. It also 
looks somewhat out of date with changes from a couple of years ago not 
reflected and missing plenty of smaller play areas within our urban sprawls. A 
very useful tool for checking though.

Also as this set doesn’t include Forestry Commission land that is fully accessible it can 
give a false impression of some of our "open spaces". A good example is Cannock 
Chase (Staffs), which is mix of open space and Forestry Commission.

Cheers
Andy

-Original Message-
From: Chris Hill [mailto:o...@raggedred.net]
Sent: 07 August 2017 22:34
To: OSM Talk GB
Subject: [Talk-GB] Latest OS Opendata

I've taken a look at the latest OS open data: OS Open Greenspace. I've created 
a simple overlay made of 1x1 degree overlay tiles, which is probably a bit big 
for some areas, so scrolling can be a bit unpredictable.

https://raggedred.net/greenspace/#13/53.4520/-1.2173

There are ten types of green space in the dataset:

"Allotments Or Community Growing Spaces"
"Bowling Green"
"Cemetery"
"Golf Course"
"Other Sports Facility"
"Play Space"
"Playing Field"
"Public Park Or Garden"
"Religious Grounds"
"Tennis Court"

Click on an area to show the type and the name if it has one.

Often the OS open data is a bit of a crude representation but this looks a pretty good. 
OS described it as "public open space" but it certainly includes some 
privately-owned spaces such as private golf courses. I think this is a useful dataset to 
check an area to see if OSM is missing something.

Feedback is welcome. If it's useful, I'll probably sort out the tile sizes and 
change the colours for each type.



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Re: [Talk-GB] Latest OS Opendata

2017-08-09 Thread Andy Townsend 

On 09/08/2017 12:44, Dave F wrote:
Interesting, if only to note it's inaccuracies: a few parks are 
missing half of their full area in my locale.


Is National Trust/CRoW land in a separate database? 


Actually, looking at NT land near me is pretty interesting - what is 
included and what is excluded is an odd combination:


https://raggedred.net/greenspace/#14/53.1727/-1.3102

(and compare with http://www.openstreetmap.org/way/331912832 which is 
the observable, mostly accessible Hardwick Park).


The GreenSpace dataset contains a number of fields that were 
historically part of Hardwick Park, are still owned by NT but aren't 
publicly accessible.  It also includes some NT-owned fields that have 
never in my lifetime been part of Hardwick Park (but may have been 
before), and also a private pub car park, but doesn't include some 
adjacent NT-owned fields that were historically part of the same 
estate.  It excludes new park access roads, so must have been updated 
fairly recently, and also excludes a farm access track through the 
estate, but not the farmyard.


It's such an odd mixture that if I were a data consumer of it I'd be 
very reluctant to use it without combining it with something else to 
sanity check it.  It's great for finding "hidden allotments" though - 
for example I'd never noticed 
https://raggedred.net/greenspace/#19/53.16869/-1.43609 before, and will 
now need to have a look to see what it actually is.


Best Regards,

Andy


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Re: [Talk-GB] Latest OS Opendata

2017-08-09 Thread Andy Robinson 
Chris,

I guess the bit of interest is the 90% of Public Forest Estate that the 
Forestry Commission dedicated right of access.
https://www.forestry.gov.uk/forestry/infd-7rufp5#access

Cheers
Andy

-Original Message-
From: Chris Hill [mailto:o...@raggedred.net] 
Sent: 08 August 2017 20:08
To: Andy Robinson; 'OSM Talk GB'
Subject: Re: [Talk-GB] Latest OS Opendata

Thanks Andy,

I've asked OS about Forestry Commission land, let's see what they say.

Cheers, Chris (chillly)


On 08/08/2017 09:37, Andy Robinson wrote:
> Nice work Chris. As you say it does contain some privately owned space. It 
> also looks somewhat out of date with changes from a couple of years ago not 
> reflected and missing plenty of smaller play areas within our urban sprawls. 
> A very useful tool for checking though.
>
> Also as this set doesn’t include Forestry Commission land that is fully 
> accessible it can give a false impression of some of our "open spaces". A 
> good example is Cannock Chase (Staffs), which is mix of open space and 
> Forestry Commission.
>
> Cheers
> Andy
>
> -Original Message-
> From: Chris Hill [mailto:o...@raggedred.net]
> Sent: 07 August 2017 22:34
> To: OSM Talk GB
> Subject: [Talk-GB] Latest OS Opendata
>
> I've taken a look at the latest OS open data: OS Open Greenspace. I've 
> created a simple overlay made of 1x1 degree overlay tiles, which is probably 
> a bit big for some areas, so scrolling can be a bit unpredictable.
>
> https://raggedred.net/greenspace/#13/53.4520/-1.2173
>
> There are ten types of green space in the dataset:
>
> "Allotments Or Community Growing Spaces"
> "Bowling Green"
> "Cemetery"
> "Golf Course"
> "Other Sports Facility"
> "Play Space"
> "Playing Field"
> "Public Park Or Garden"
> "Religious Grounds"
> "Tennis Court"
>
> Click on an area to show the type and the name if it has one.
>
> Often the OS open data is a bit of a crude representation but this looks a 
> pretty good. OS described it as "public open space" but it certainly includes 
> some privately-owned spaces such as private golf courses. I think this is a 
> useful dataset to check an area to see if OSM is missing something.
>
> Feedback is welcome. If it's useful, I'll probably sort out the tile sizes 
> and change the colours for each type.
>
> --
> cheers
> Chris Hill (chillly)
>
>
>



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Re: [Talk-GB] Latest OS Opendata

2017-08-08 Thread Andy Robinson 
Nice work Chris. As you say it does contain some privately owned space. It also 
looks somewhat out of date with changes from a couple of years ago not 
reflected and missing plenty of smaller play areas within our urban sprawls. A 
very useful tool for checking though.

Also as this set doesn’t include Forestry Commission land that is fully 
accessible it can give a false impression of some of our "open spaces". A good 
example is Cannock Chase (Staffs), which is mix of open space and Forestry 
Commission. 

Cheers
Andy

-Original Message-
From: Chris Hill [mailto:o...@raggedred.net] 
Sent: 07 August 2017 22:34
To: OSM Talk GB
Subject: [Talk-GB] Latest OS Opendata

I've taken a look at the latest OS open data: OS Open Greenspace. I've created 
a simple overlay made of 1x1 degree overlay tiles, which is probably a bit big 
for some areas, so scrolling can be a bit unpredictable.

https://raggedred.net/greenspace/#13/53.4520/-1.2173

There are ten types of green space in the dataset:

"Allotments Or Community Growing Spaces"
"Bowling Green"
"Cemetery"
"Golf Course"
"Other Sports Facility"
"Play Space"
"Playing Field"
"Public Park Or Garden"
"Religious Grounds"
"Tennis Court"

Click on an area to show the type and the name if it has one.

Often the OS open data is a bit of a crude representation but this looks a 
pretty good. OS described it as "public open space" but it certainly includes 
some privately-owned spaces such as private golf courses. I think this is a 
useful dataset to check an area to see if OSM is missing something.

Feedback is welcome. If it's useful, I'll probably sort out the tile sizes and 
change the colours for each type.

--
cheers
Chris Hill (chillly)


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[Talk-GB] Latest OS Opendata

2017-08-07 Thread Chris Hill 
I've taken a look at the latest OS open data: OS Open Greenspace. I've 
created a simple overlay made of 1x1 degree overlay tiles, which is 
probably a bit big for some areas, so scrolling can be a bit unpredictable.


https://raggedred.net/greenspace/#13/53.4520/-1.2173

There are ten types of green space in the dataset:

"Allotments Or Community Growing Spaces"
"Bowling Green"
"Cemetery"
"Golf Course"
"Other Sports Facility"
"Play Space"
"Playing Field"
"Public Park Or Garden"
"Religious Grounds"
"Tennis Court"

Click on an area to show the type and the name if it has one.

Often the OS open data is a bit of a crude representation but this looks 
a pretty good. OS described it as "public open space" but it certainly 
includes some privately-owned spaces such as private golf courses. I 
think this is a useful dataset to check an area to see if OSM is missing 
something.


Feedback is welcome. If it's useful, I'll probably sort out the tile 
sizes and change the colours for each type.


--
cheers
Chris Hill (chillly)


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