Opened 15 years ago

Closed 15 years ago

#1868 closed defect (fixed)

wmsplugin: Unable to max-out yahoo resolution

Reported by: mcdmx@… Owned by: framm
Priority: major Milestone:
Component: Plugin Version: latest
Keywords: Cc:


The WMS-Plugin is unable to download high-resolution tiles from Yahoo, e.g. compare:

to the screenshot attached.

Zooming in and hitting "Change resolution" produces even worse results.

WMS-Plugin version: 12439

Attachments (1)

snapshot.jpg (55.2 KB ) - added by mcdmx@… 15 years ago.

Download all attachments as: .zip

Change History (8)

by mcdmx@…, 15 years ago

Attachment: snapshot.jpg added

comment:1 by anonymous, 15 years ago

Summary: wmsplugin (new): Unable to max-out resolutionwmsplugin: Unable to max-out yahoo resolution

comment:2 by stoecker, 15 years ago

This resolution seems not to be reachable using the Yahoo API or there is some trick. Using the normal API description I was unable to reach that accuracy.

in reply to:  2 comment:3 by mcdmx@…, 15 years ago

Potlatch is able to get the full Yahoo imagery resolution... Aren't they using the same API as the WMS plugin?

comment:4 by stoecker, 15 years ago

Hmm, they use Flash API not JavaScript. The page you refer above alsouses JavaScript, but of a totally different form. I really do not know.

At least I was unable to increase resolution with the JavaScript API. It is on zoom level 1 and this is the highest possible level (is reversed compared to OSM).

comment:5 by xeen, 15 years ago

The problem is that you can only specify zoom levels up to 1 (see [0]). There seems to be a radius switch, as explained here [1] that allows with a low value [2] to achieve very good zoom levels, see [3]. However, it's not possible to switch the latter to sat mode, at least not in an obvious way that isn't hacking the API and we certainly don't want to do that. My guess is that we'll have to teach webkit using flash and use the flash API.

comment:6 by amettler@…, 15 years ago

FYI, the highest resolution tiles on yahoo are actually public domain imagery from USGS, which can also be obtained from's WMS feed (this only has data in those places where Yahoo has the high-res images): Urban

(topo maps are available too, see my user page

comment:7 by stoecker, 15 years ago

Resolution: fixed
Status: newclosed

Added to the data sources of WMS plugin.

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