Re: [OSM-Talk-ZA] High Resolution Aerial Imagery of Cape Town (8cm)

2016-09-07 Thread Grant Slater 
Dawid, I have tried to get aerial imagery from Joburg Metro
Municipality but they wanted to charge me R20k+ for the imagery.
Ekurhuleni was similar. Port Elizabeth (Nelson Mandela Bay
municipality), East London (Buffalo City Metropolitan) & Durban
(eThekwini Metro Municipality) have similar aerial imagery, but I
haven't yet found the right channel to request the imagery.

CoCT initial wanted to charge similar, but I was able to negotiate
special permission for OpenStreetMap. I also have the 2013 imagery.
They are busy working on 2016 imagery, but wasn't able to get
permission for this imagery (yet).

On http://coct.aerial.openstreetmap.org.za/ if you select the "DRIFT
TEST" layer, this has continental drift correction. The African
continental plate is drifting North East at around 3cm per year. The
co-ordinate system that City of Cape Town uses the fixed position of
the Hartbeeshoek Radio Telescope as the co-ordinate origin.
OpenStreetMap uses WGS84. I'll remove "DRIFT TEST" option this evening
and make it the default. Yes, this does mean OSM co-ordinates drift
out around 3cm per year..., same for the UK... Around 7cm per year for
Australia, I'm sure we'll work out a solution at stage, when most of
us are mapping at this kind of crazy resolution.

I'll get the imagery added to iD and JOSM in a few days, until then
feel free to add it manually. Please use tag source=coct-2015

Kind regards,

Grant


On 7 September 2016 at 15:09, Dawid Loubser  wrote:
> Grant, thanks for your awesome work! These will be *so* useful - I
> wonder when / if we could get similar for other provinces?
>
> P.S. Has anybody spotted an interesting shark or whale in the water yet?
> I'm trying. But the res is good enough to spot some great bird flying
> formations :-)
>
> regards,
> Dawid
>
>
> On 07/09/2016 16:05, Grant Slater wrote:
>> Hi,
>>
>> Yup... I forgot to move osm.org.za + openstreetmap.org.za by the
>> suspend deadline. I had a real adventure moving them to a new
>> registrar and getting them unblocked.
>> I was in good company:
>> http://firefishy.com/orgza-domains-suspended-05092016-top.txt ;-)
>>
>> Yes, the City of Cape Town aerial imagery is AWESOME! If you squint at
>> the aerial imagery of Sandy Bay, it is just about possible to tell if
>> someone is wearing a swimming costume. ;-)
>> Link reminder: http://coct.aerial.openstreetmap.org.za/
>>
>> I haven't updated the NGI aerial imagery since 2014. *hides in shame*
>> I've received updated source files from NGI and plan to update it soon.
>>
>> Kind regards,
>>
>> Grant
>>
>>
>> On 7 September 2016 at 13:54, Kieron Thwaites  
>> wrote:
>>> Thanks for the effort Grant -- DNS appears fixed on my side (were you
>>> one of the victims of the .org.za mess?), and the imagery looks
>>> amazing.  Already looking forward to putting it to good use.
>>>
>>> On a semi-related note, our imagery from NGI is starting to show its
>>> age.  I'm within walking distance of the Mowbray office, so if
>>> updating this imagery is on your radar, let me know if there's
>>> anything I can do to assist.
>>>
>>> --K
>>>
>>> On 5 September 2016 at 18:04, Grant Slater  
>>> wrote:
 Hi All,

 And of course I experience an issue as soon as I sent this...
 openstreetmap.org.za DNS has issues, give me a few days to fix.
 Sorry for the inconvenience.

 Kind regards,

 Grant


 On 5 September 2016 at 14:38, Grant Slater  
 wrote:
> Hi OpenStreetMap ZA,
>
> I've been able to get permission for OpenStreetMap to use the City of
> Cape Town's very high resolution 2015 aerial imagery (8cm). I
> collected a copy of the imagery last month.
>
> It will be available in JOSM and iD in a few weeks time.
>
> In the mean time, here is a quick preview:
> http://coct.aerial.openstreetmap.org.za/
>
> The imagery is expressly ONLY FOR OPENSTREETMAP USAGE. I would have
> preferred it be open to all, but wasn't able to negotiate this with
> CoCT.
> Note CoCT list the imagery on their Open Data portal:
> https://web1.capetown.gov.za/web1/OpenDataPortal/DatasetDetail?DatasetName=Aerial%20photography
>
> Due to continental drift and the conversion between Hartbeeshoek94 and
> WGS84 (as used by OSM) the imagery is *currently* around 66cm offset
> (2016 - 1994 = 22 years. Drift ~3cm per year). I am busy processing
> the imagery to correct this, hence the delay in getting it into OSM
> editors.
>
> Kind regards,
>
> Grant
 ___
 Talk-ZA mailing list
 Talk-ZA@openstreetmap.org
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>>

Re: [OSM-Talk-ZA] High Resolution Aerial Imagery of Cape Town (8cm)

2016-09-07 Thread Grant Slater 
Hi,

Yup... I forgot to move osm.org.za + openstreetmap.org.za by the
suspend deadline. I had a real adventure moving them to a new
registrar and getting them unblocked.
I was in good company:
http://firefishy.com/orgza-domains-suspended-05092016-top.txt ;-)

Yes, the City of Cape Town aerial imagery is AWESOME! If you squint at
the aerial imagery of Sandy Bay, it is just about possible to tell if
someone is wearing a swimming costume. ;-)
Link reminder: http://coct.aerial.openstreetmap.org.za/

I haven't updated the NGI aerial imagery since 2014. *hides in shame*
I've received updated source files from NGI and plan to update it soon.

Kind regards,

Grant


On 7 September 2016 at 13:54, Kieron Thwaites  wrote:
> Thanks for the effort Grant -- DNS appears fixed on my side (were you
> one of the victims of the .org.za mess?), and the imagery looks
> amazing.  Already looking forward to putting it to good use.
>
> On a semi-related note, our imagery from NGI is starting to show its
> age.  I'm within walking distance of the Mowbray office, so if
> updating this imagery is on your radar, let me know if there's
> anything I can do to assist.
>
> --K
>
> On 5 September 2016 at 18:04, Grant Slater  
> wrote:
>> Hi All,
>>
>> And of course I experience an issue as soon as I sent this...
>> openstreetmap.org.za DNS has issues, give me a few days to fix.
>> Sorry for the inconvenience.
>>
>> Kind regards,
>>
>> Grant
>>
>>
>> On 5 September 2016 at 14:38, Grant Slater  
>> wrote:
>>> Hi OpenStreetMap ZA,
>>>
>>> I've been able to get permission for OpenStreetMap to use the City of
>>> Cape Town's very high resolution 2015 aerial imagery (8cm). I
>>> collected a copy of the imagery last month.
>>>
>>> It will be available in JOSM and iD in a few weeks time.
>>>
>>> In the mean time, here is a quick preview:
>>> http://coct.aerial.openstreetmap.org.za/
>>>
>>> The imagery is expressly ONLY FOR OPENSTREETMAP USAGE. I would have
>>> preferred it be open to all, but wasn't able to negotiate this with
>>> CoCT.
>>> Note CoCT list the imagery on their Open Data portal:
>>> https://web1.capetown.gov.za/web1/OpenDataPortal/DatasetDetail?DatasetName=Aerial%20photography
>>>
>>> Due to continental drift and the conversion between Hartbeeshoek94 and
>>> WGS84 (as used by OSM) the imagery is *currently* around 66cm offset
>>> (2016 - 1994 = 22 years. Drift ~3cm per year). I am busy processing
>>> the imagery to correct this, hence the delay in getting it into OSM
>>> editors.
>>>
>>> Kind regards,
>>>
>>> Grant
>>
>> ___
>> Talk-ZA mailing list
>> Talk-ZA@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-za
>
> ___
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Re: [OSM-Talk-ZA] High Resolution Aerial Imagery of Cape Town (8cm)

2016-09-05 Thread Grant Slater 
Hi All,

And of course I experience an issue as soon as I sent this...
openstreetmap.org.za DNS has issues, give me a few days to fix.
Sorry for the inconvenience.

Kind regards,

Grant


On 5 September 2016 at 14:38, Grant Slater  wrote:
> Hi OpenStreetMap ZA,
>
> I've been able to get permission for OpenStreetMap to use the City of
> Cape Town's very high resolution 2015 aerial imagery (8cm). I
> collected a copy of the imagery last month.
>
> It will be available in JOSM and iD in a few weeks time.
>
> In the mean time, here is a quick preview:
> http://coct.aerial.openstreetmap.org.za/
>
> The imagery is expressly ONLY FOR OPENSTREETMAP USAGE. I would have
> preferred it be open to all, but wasn't able to negotiate this with
> CoCT.
> Note CoCT list the imagery on their Open Data portal:
> https://web1.capetown.gov.za/web1/OpenDataPortal/DatasetDetail?DatasetName=Aerial%20photography
>
> Due to continental drift and the conversion between Hartbeeshoek94 and
> WGS84 (as used by OSM) the imagery is *currently* around 66cm offset
> (2016 - 1994 = 22 years. Drift ~3cm per year). I am busy processing
> the imagery to correct this, hence the delay in getting it into OSM
> editors.
>
> Kind regards,
>
> Grant

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[OSM-Talk-ZA] High Resolution Aerial Imagery of Cape Town (8cm)

2016-09-05 Thread Grant Slater 
Hi OpenStreetMap ZA,

I've been able to get permission for OpenStreetMap to use the City of
Cape Town's very high resolution 2015 aerial imagery (8cm). I
collected a copy of the imagery last month.

It will be available in JOSM and iD in a few weeks time.

In the mean time, here is a quick preview:
http://coct.aerial.openstreetmap.org.za/

The imagery is expressly ONLY FOR OPENSTREETMAP USAGE. I would have
preferred it be open to all, but wasn't able to negotiate this with
CoCT.
Note CoCT list the imagery on their Open Data portal:
https://web1.capetown.gov.za/web1/OpenDataPortal/DatasetDetail?DatasetName=Aerial%20photography

Due to continental drift and the conversion between Hartbeeshoek94 and
WGS84 (as used by OSM) the imagery is *currently* around 66cm offset
(2016 - 1994 = 22 years. Drift ~3cm per year). I am busy processing
the imagery to correct this, hence the delay in getting it into OSM
editors.

Kind regards,

Grant

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