OpenStreetMap 标志 OpenStreetMap

Update NEW map imagery [necessary]

farhadGuli 于 2018年六月24日 以 English 发布

OSM needs a new version of layers ,new imagery satellite layers , I found HERE map satellite its really a new map imagery that we can use full edits and see new roads with buildings… I hope of OSM to add new updated layers for contributing better by users …

HERE MAP 2018: Alt text

OSM 2018 : Alt text

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讨论

imagico2018年06月24日 08:58 的评论

Note the Here roads are largely crap. You can see that when you compare to the image layer - roads frequently cross through houses, the typical AI nonsense that allows them to advertise to their customers: We have X kilometers of roads in Iraq - more than any other map service. We will likely see a lot more like this in the future in various places but this is not a role model for OSM!

See:

https://mc.bbbike.org/mc/?lon=42.681952&lat=37.175496&zoom=17&num=4&mt0=nokia-map&mt1=mapnik&mt2=nokia-satellite&mt3=bing-satellite&marker=

For reference - here a recent (June 2018) open data image from the same area:

Sentinel2 image north Iraq June 2018

farhadGuli2018年06月24日 10:10 的评论

thanks for reply , but this ways its really difficult we can’t map accurately by comparing two maps !

Zverik2018年06月24日 10:17 的评论

OSM is a collaborative effort for mapping by entusiasts, not an organized venture to map as much as possible for the sake of numeric reports. Which means, if you don’t live in that area and cannot contribute anything without imagery, try another area, where you can. If you do, stop marvelling at proprietary imagery, go out, collect GPS traces and POIs, and map it.

For a base road network, you could politely ask Christoph (imagico) to georeference the fresh low-detail imagery, so you could trace roads from it.

ff57222018年06月25日 08:20 的评论

The filename from imagico shows that it’s just from Sentinel-2 which you can process yourself to use as a background in OSM.

osm.wiki/User:Ff5722/Using_Sentinel-2_imagery

SimonPoole2018年06月25日 09:21 的评论

@farhadGull as a clarification: no data or imagery from Here is a legit source for OSM editing.

Then: a year from now likely some other imagery provider will likely have more up to date imagery of that location and then somebody else and so. The providers of imagery mosaics update their imagery relatively seldom, as it costs money (in more than one way) and tend to concentrate on regions of the globe where it makes economic sense for them (particularly with respect to higher resolution imagery).

@imagico ever had any thoughts about generating a regularly (automaic updated) global Sentinel-2 layer for OSM use?

SimonPoole2018年06月25日 14:24 的评论

@philippec what exactly did you wanted to convey with the link to a competing company?

philippec2018年06月25日 14:25 的评论

There is something to learn. Why do you ask ?

SimonPoole2018年06月25日 14:31 的评论

You might need be a bit more explicit about what, on topic (current aerial imagery), point there is to lean from Here.

imagico2018年06月25日 19:33 的评论

@SimonPoole - you want to finance that?

The main problems of this idea are in parts already demonstrated by Landsat Live from Mapbox:

  • If you just blindly show the latest image everywhere you have something of rather limited use for mapping because of clouds and other reasons why the newest image is not the best. If you want to hand select the best image from some kind of recent time frame for every area we are talking about a quite a lot of work on a regular basis that requires significant qualification to be performed well.
  • If you use a dumb, constant color processing you get results of very limited usefulness in many areas - see here for some details on this.
  • If you offer all individual images separately image selection is a task of significant difficulty for the mapper, in particular in high cloud incidence areas.

There are already services that offer online access to the standard ESA TCI rendering of some Sentinel-2 images. For the shown image you can for example use (in JOSM notation):

https://geoservice.code-de.org/Sentinel2/wms?SERVICE=WMS&VERSION=1.1.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=S2_MSI_L1C&time=2018-06-09T07%3A56%3A11.024Z%2F2018-06-09T07%3A56%3A11.024Z&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}

Note this WMS is currently not advertised for arbitrary use AFAIK so it is not clear if they are fine with using it for mapping. If you intend to use this you should probably contact code-de (contact details in the GetCapabilities or on the website).

SimonPoole2018年06月25日 20:53 的评论

@imagico as you probably can guess, I completely realize the difficulty of selecting “good” imagery (though it might be getting easier over time to do automatically).

On the other hand there -would- be significant value in having a global Sentinel derived layer even if not continuously updated (but at least not totally stale), given that it is afaik currently the open imagery source with the highest nominal resolution. Naturally if the pain is large enough (say China) the imagery can already be used now, but doing so is rather convoluted and likely outside the means of out typical mapper.

I don’t think funding would be a significant hurdle as the benefits are fairly clear, so the WMF and others could likely be convinced that the project makes sense (obviously other free imagery sources could be added where available, but that would be an undertaking with a far larger scope.

BladeTC2018年06月26日 16:55 的评论

It is possible to see the marking of some new streets in the Bing image.

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