Opened 10 years ago

Closed 10 years ago

Last modified 10 years ago

#1618 closed defect (fixed)

WMS map is shifted in different zooms

Reported by: Aleš Janda Owned by: cbro@…
Priority: major Milestone:
Component: merkaartor Version:
Keywords: Cc:

Description

When I use WMS layer, the layer is shifted differently in different zoom levels.

Example:

  • I use cadastral map for Czech rep. and I draw a building according to WMS layer (See image 1)
  • When I scroll out one zoom level, it is still ok (See image 2)
  • But in next zoom level is layer shifted from drawed building (See image 3) and the next level again but more (See image 4). In this level, building is shifted by several meters from place in map zoomed in and even shift has other direction than in image 3 (!).

However, when I use JOSM instead, the same map layer is always in the same place, and, unfortunately, the places of buildings in layer in JOSM are not equivalent to any zoom level in Merkaartor. (See the same place in JOSM) So I can't do precise maps with Merkaartor.

I use Merkaartor v0.12 for Linux but the same issue is in v0.13 rc2 for Windows.

The address of WMS is:
Server: wms.cuzk.cz
Main path: /wms.asp?service=WMS&VERSION=1.1.1&REQUEST=GetMap
Layers: kn,def_budovy
Projection: EPSG:4326
Styles: ,
Image format: image/png

Please check this bug, I very like Merkaartor (thank for it) but with this issue I can't do good maps. Thanks.

Attachments (5)

merkaartor-bug-zoom4.png (168.4 KB) - added by Aleš Janda 10 years ago.
Max. zoom level - after drawing
merkaartor-bug-zoom3.png (185.1 KB) - added by Aleš Janda 10 years ago.
Zoom level 3 - still ok
merkaartor-bug-zoom2.png (219.8 KB) - added by Aleš Janda 10 years ago.
Zoom level 2 - shifted left
merkaartor-bug-zoom1.png (18.1 KB) - added by Aleš Janda 10 years ago.
Zoom level 1 - shifted up
merkaartor-bug-josm.png (171.9 KB) - added by Aleš Janda 10 years ago.
The same place in JOSM - building is misplaced

Download all attachments as: .zip

Change History (9)

Changed 10 years ago by Aleš Janda

Attachment: merkaartor-bug-zoom4.png added

Max. zoom level - after drawing

Changed 10 years ago by Aleš Janda

Attachment: merkaartor-bug-zoom3.png added

Zoom level 3 - still ok

Changed 10 years ago by Aleš Janda

Attachment: merkaartor-bug-zoom2.png added

Zoom level 2 - shifted left

Changed 10 years ago by Aleš Janda

Attachment: merkaartor-bug-zoom1.png added

Zoom level 1 - shifted up

Changed 10 years ago by Aleš Janda

Attachment: merkaartor-bug-josm.png added

The same place in JOSM - building is misplaced

comment:1 Changed 10 years ago by Chris Browet

Could you please give me the permalink to this place.

comment:2 Changed 10 years ago by Aleš Janda

Thanks. Posted object is at http://www.openstreetmap.org/?lat=50.24556&lon=14.31741&zoom=17&layers=0B00FTF but this bug I found everywhere (at least whole town around).

comment:3 Changed 10 years ago by Chris Browet

Resolution: fixed
Status: newclosed

(In [13888]) FIX : Insufficent precision for WMS bbox requests at high zoom (fixes #1618)

comment:4 Changed 10 years ago by Aleš Janda

Wow, such an incredible speed! Now it works ok. Thank you very much!

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