[OSM-talk-be] Orthofoto werkbestand by default in editors?

[joost schouppe]

 Hi,

Stijn Claes commented this in the Matrix chat:

> Both the "final orthophotomosaic" as the "orthofotowerkbestand" are only
corrected at terrain level and not at surface level, they are not so-called
true orthos. If you notice less tilt for a high building, it mostly is due
to the fact that the position of the camera in the airplane was closer
above the building (lower angle).
> The 'orthophotowerkbestand' is indeed the result of an automatic
procedure, so no "manual" corrections were done to improve geometry and
radiometry (colours). The latter can be seen from more pronounced seamlines
(= lines where two neighbouring images connect)

So while there are slight quality differences, I've not heard anyone say it
shouldn't be included as an option.

Best,
Joost


Op ma 6 sep. 2021 om 18:28 schreef Stijn Rombauts via Talk-be <
talk-be at openstreetmap.org>:

> Hi,
>
> Bridges or other things above ground level are sometimes a bit shifted or
> wobbly in these images. But in general the quality is indeed pretty decent.
>
> Regards,
>
> StijnRR
> On Saturday, September 4, 2021, 10:47:54 AM GMT+2, joost schouppe <
> joost.schouppe at gmail.com> wrote:
>
>
> Hi,
>
> I've been using the Flemish orthofoto "werkbestand" by default over the
> past few months.
>
> This is the imagery that is updated the soonest after new imagery is shot,
> but the metadata says the quality can be lower. I believe concern about the
> quality is why it hasn't been added to the imagery repositories used by iD
> and JOSM.
>
> I have however not had a single data quality issue myself, and having more
> recent imagery is always nice.
>
> *Has anyone had issues with this dataset or recommend against adding it?
> If not, I'll try to get the imagery added to the repositories as "just
> another layer" (as opposed to "the best option for the area").*
>
> You can view the imagery here:
>
> http://geo-explore.ecs.soton.ac.uk/?view=wms&endpoint=https://geoservices.informatievlaanderen.be/raadpleegdiensten/ofw/wms&layer=OFW#9/50.9671/4.6555
>
> It can be manually added in iD:
>
>
> https://geoservices.informatievlaanderen.be/raadpleegdiensten/ofw/wms?FORMAT=image/png&TRANSPARENT=TRUE&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=OFW&STYLES=&SRS=EPSG:3857&WIDTH={width}&HEIGHT={height}&BBOX={bbox}
>
> And in JOSM:
>
> wms:
> https://geoservices.informatievlaanderen.be/raadpleegdiensten/ofw/wms?FORMAT=image/png&TRANSPARENT=TRUE&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=OFW&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}
>
> This metadata item has a little (but not much) background. There's also a
> layer available with the date of the flight.
>
> https://www.geopunt.be/catalogus/datasetfolder/50134be3-f0cd-47c5-8f6e-4a0936287947
>
>
> Best,
> Joost Schouppe
>
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-- 
Joost Schouppe
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