Author: twain
[Added to the original trac issue at 8.09pm, Thursday, 26th November 2009]

I've added an extra param, viewboxlbrt, which will accept the points in that order although I've not tested it properly yet.

Author: Harry Wood
[Added to the original trac issue at 10.45pm, Tuesday, 8th March 2016]

I was just noticing this 'viewboxlbrt' parameter on the wiki parameter docs, but the fun thing is... both viewbox and viewboxlbrt parameters accept the top and bottom either way round!

All of the following work ok:

• viewbox left,bottom,right,top: http://nominatim.openstreetmap.org/search?q=135+pilkington+avenue,+birmingham&format=json&bounded=1&viewbox=-3,52,-1,53
• viewbox left,top,right,bottom: http://nominatim.openstreetmap.org/search?q=135+pilkington+avenue,+birmingham&format=json&bounded=1&viewbox=-3,53,-1,52
• viewboxlbrt left,bottom,right,top: http://nominatim.openstreetmap.org/search?q=135+pilkington+avenue,+birmingham&format=json&bounded=1&viewboxlbrt=-3,52,-1,53
• viewboxlbrt left,top,right,bottom: http://nominatim.openstreetmap.org/search?q=135+pilkington+avenue,+birmingham&format=json&bounded=1&viewboxlbrt=-3,53,-1,52

Likewise left and right can happily be swapped around.

Twain added viewboxlbrt parameter 6 years ago. I imagine maybe it became min/max agnostic in recent times. Is it a bug? not really. ...it's a good thing!

But it seems to mean that the 'viewboxlbrt' parameter could be quietly dropped from the docs (deprecated) It seems to be pointless.

Author: lonvia
[Added to the original trac issue at 12.15pm, Saturday, 30th September 2017]

The way it works now, any two opposite points in the viewbox will do. I've changed the documentation but the viewboxlbrt parameter will continued to be accepted.