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#1 2017-05-12 13:25:55

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Imagery updates

From the import mailing list,

Kevin Bullock wrote:

[...] in the DigitalGlobe Premium layer we have made available for OSM, our intention is to publish a global imagery layer. [...] The next region that will be updated is SE Asia and China. This includes Thailand and all the surrounding countries. [...] Our estimated timeframe is late/end of May for Thailand and the rest of SE Asia to be available, at which time, you and the entire OSM community will have access to the exact same data that Facebook has been using.

For the time being, this tool can be accessed to know the year of the recorded imagery.

Unrelated, the AI-Assisted Road Tracing thing may be delayed until Facebook gets the thumbs up from Thailand's OSM community. The updated imagery, hopefully, helps a lot to verify the AI output; but always remember that ideally, ground truth surveys is the best.

Last edited by AkuAnakTimur (2017-05-13 10:15:16)

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#2 2017-05-24 10:17:09

kucai
Member
Registered: 2011-11-08
Posts: 140

Re: Imagery updates

Finally got to see the new imagery for a few towns in Terengganu. Wonderful!

However, the usual problem will come for newly available imagery for cities where none was available before - imagery offset. Not everybody uses JOSM with that specific plugin, so that means those people will find that the roads (gps traces) are off by some distance from the imagery.

My proposal for this situation is for us to just trace from the imagery the way it is. After let's say 90% of the roads in the area have been traced, only then somebody comes and align the whole imagery to available gps tracks. It would be a much easier single step to do..

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#3 2017-05-24 14:10:28

angys
Member
From: Bukit Mertajam, Penang
Registered: 2016-06-10
Posts: 36

Re: Imagery updates

And you all can notice Hulu Selangor Imagery also avaible now, That some user had been trace for Kuala Kubu Baru and Rasa.Maybe Klang Valley suburban area can be trace by using DG.

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#4 2017-05-25 03:32:49

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

Bing imagery, however, is sourced from several partners (for example, Airbus). If they happened to update their imagery, I would say that (probably major) cities would get them first, if not the whole country. At least one can hear them first through their blog or Twitter account.

DigitalGlobe is going to update the Premium layer anyway sooner or later, but I value the diversity of having multiple imagery. Because from that way, new OSM users are aware that there are offsets - or how much the satellite layer deviates away from actual things in reality.

Bing imagery has minor offsets sometimes but DG ones is more noticeable. For example, DG Standard has 10, 10 (degrees?) offset south of Alor Setar. A little bit north, then it is around 0, 5.

(re)

kucai wrote:

My proposal for this situation is for us to just trace from the imagery the way it is. After let's say 90% of the roads in the area have been traced, only then somebody comes and align the whole imagery to available gps tracks. It would be a much easier single step to do..

Also, at least we could tell them to tick this and see how much roads are not in line (lari, tak centre) with GPS traces:

mHEvGpG.png?1

I usually do them manually, step by step, bit by bit. Ya lor, not many people yet in my focus area. Unlike in KL, Klang Valley or Penang - had headaches while aligning building in Penang. Also, building height is different, so I better do it one by one (if I have the time...).

P.S. The JOSM editor has a direct access (but must be activated first) to use the Strava heatmap, but iD and Potlatch has access using Custom imagery. Surprise, surprise, some places may not have uploaded GPS traces, but there may be tracks recorded by Strava users.

Last edited by AkuAnakTimur (2017-05-25 03:36:41)

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#5 2017-06-21 04:49:06

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

I'm seeing updates on the DigitalGlobe Premium layer. For some places, it used to be roughly the same as the low-res black and white Mapbox layer, but today, they are being replaced with high-res, coloured one.

Can't really say whether they are the most recent ones, but IIRC at least the Premium layer is less cloudy than the Standard layer.

From Thailand's forum:

DrishT wrote:

<snip>

Please note the DG Premium Layer should be updating soon so you will be seeing exactly what we see in a matter of days smile

Thanks again for your help Bernhard!

Best,
Drishtie

Last edited by AkuAnakTimur (2017-06-21 04:50:29)

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#6 2017-07-22 18:35:45

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

Mapbox Satellite also has updates, but they're more or less like the DigitalGlobe Premium layer. Probably useful because from what I read, the Premium layer might get updated more often.

P.S. Why Penang seemed like didn't get the love of updates? Strange. roll

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#7 2017-07-23 01:37:36

angys
Member
From: Bukit Mertajam, Penang
Registered: 2016-06-10
Posts: 36

Re: Imagery updates

What a pity, but we have DG to use too.

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#8 2017-07-23 03:30:51

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

angys wrote:

What a pity, but we have DG to use too.

Seberang Perai has three updated imageries. Three! Bing from 2012/13, DigitalGlobe Standard and DigitalGlobe Premium (probably the latest, you might know better). George Town only has DigitalGlobe Premium only, and new OSM contributors are very likely to see the Bing layer first (that's from 10 years ago). That makes me a little bit worried.

Last edited by AkuAnakTimur (2017-07-23 03:41:48)

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#9 2017-07-23 10:46:07

angys
Member
From: Bukit Mertajam, Penang
Registered: 2016-06-10
Posts: 36

Re: Imagery updates

Yes SPT is more clearly now but SPS stiil blur.:rolleyes:I will try to cover Seberang Perai suburban area first in this year..

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#10 2017-08-26 03:48:58

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

Another imagery layer is made available courtesy of ESRI.

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#11 2017-10-05 06:13:29

AkuAnakTimur
Member
From: Kedah, Malaysia
Registered: 2013-09-12
Posts: 157
Website

Re: Imagery updates

DigitalGlobe Standard imagery has been updated near my place. Probably from late last year or early this year!

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