Opened 8 years ago
Last modified 8 years ago
#16084 closed defect
WMTS allows adding imagery with unsupported projections — at Version 1
| Reported by: | StefanB | Owned by: | team |
|---|---|---|---|
| Priority: | normal | Milestone: | 18.03 |
| Component: | Core imagery | Version: | |
| Keywords: | projection slovenia wmts | Cc: |
Description (last modified by )
In imagert for Slovenia we have a reference to WMTS service:
https://josm.openstreetmap.de/wiki/Maps/Slovenia#GURS:DTK5wmts
Which fetches capabilities from
http://prostor4.gov.si/ows2-gwc-pub/service/wmts?request=getCapabilities
Some of the layers there are in an older national projection EPSG:3912 (https://epsg.io/3912 = D48/GK), and those layers are not positioned correctly in JOSM (eg in lower zoom it is shifter 100km to the north). This old projection is being phased out, but some legacy data is still in it.
The layers in newer projection EPSG:3794 (https://epsg.io/3794 = D96/TM) are positioned much better
Whenever needed and possible, we use http://geocoordinateconverter.tk/ to convert data from the old projection to ETRS89, but int this case the layers are served via wmts service, giving us no influence.
Either
- EPSG:3912 projection should be better supported (probably not easy) to position the layer better or
- disable such layer selection in the "Select WMTS layer" dialog window
- add some additional warning that layer might not work at all
Current "Select WMTS layer" dialog:
