[mapserver-users] [TinyOWS] TinyOWS 1.1.0 and the old good axis order trouble

[Martin Kofahl]

Hi Jukka,
the mapaxisorder.csv was introduced with the axis order requirements of
WMS 1.3.0/INSPIRE and is still a poor workaround to get things working.
Accordning to [1] proj4 now supports an +axis parameter. Using the epsg
file with +axis seems quite worthwhile to me, much better than an own
list of codes. However, the epsg file shipped with proj4 4.8.0 doesn't
look complete regarding +axis. I'll try to get an answer from the proj
list.

Martin

[1] http://trac.osgeo.org/proj/wiki/GenParms



> Hi,
> 
>  
> 
> Mapserver seems to rely on this list of coordinate systems with
> reversed axis order:
> 
> https://github.com/mapserver/mapserver/blob/master/mapaxisorder.csv
> 
>  
> 
> Because TinyOWS lives so close to Mapserver perhaps they could utilize
> the same list?  It would be nice if Mapserver WFS and TinyOWS WFS
> would have the same understanding about the axis order.
> 
>  
> 
> -Jukka-
> 
>  
> 
>  
> 
> Rahkonen Jukka wrote:
> 
> 
>  
> 
> Hi Olivier,
> 
>  
> 
> Sorry for the late response.  I analyzed finally what axis order
> alternatives the srs_wkt field in the spatial_ref_sys table contains
> and the situation is a bit more complicated than you have believed.
> This is the result of a SELECT DISTINCT query
> 
>  
> 
> 1)     AXIS[""Easting"",EAST],AXIS[""Northing"",NORTH]]"
> 
> 2)     AXIS[""X"",EAST],AXIS[""Y"",NORTH]]"
> 
> 3)     AXIS[""Northing"",NORTH],AXIS[""Easting"",EAST]]"
> 
> 4)     AXIS[""X"",NORTH],AXIS[""Y"",EAST]]"
> 
> 5)     AXIS[""Y"",EAST],AXIS[""X"",NORTH]]"
> 
> 6)     AXIS[""X"",SOUTH],AXIS[""Y"",WEST]]"
> 
> 7)     AXIS[""Y"",NORTH],AXIS[""X"",EAST]]"
> 
> 8)     AXIS[""E(X)"",EAST],AXIS[""N(Y)"",NORTH]]"
> 
> 9)     AXIS[""x"",NORTH],AXIS[""y"",EAST]]"
> 
> 10)  AXIS[""Easting"",UNKNOWN],AXIS[""Northing"",UNKNOWN]]"
> 
> 11)  AXIS[""none"",NORTH],AXIS[""none"",EAST]]"
> 
> 12)  AXIS[""X"",UNKNOWN],AXIS[""Y"",UNKNOWN]]"
> 
> 13)  AXIS[""Northing"",UNKNOWN],AXIS[""Easting"",UNKNOWN]]"
> 
>  
> 
> My conclusions: 
> 
>  
> 
> Must not be flipped: 1, 2, 8
> 
> Must be flipped: 3, 4, 9
> 
> Probably should not be flipped: 10, 12
> 
> Probably should be flipped: 11, 13
> 
> No idea: 5, 6, 7  
> 
>  
> 
> The most important system for me is EPSG:3067 and it has the WKT as in
> alternative 1:  AXIS[""Easting"",EAST],AXIS[""Northing"",NORTH]]"
> 
>  
> 
> -Jukka Rahkonen-
> 
>  
> 
>  
> 
>  
> 
> Lähettäjä:mapserver-users-bounces at lists.osgeo.org
> [mailto:mapserver-users-bounces at lists.osgeo.org] Puolesta Olivier
> Courtin
> Lähetetty: 18. joulukuuta 2012 9:10
> Vastaanottaja: Mapserver-Users (mapserver-users at lists.osgeo.org)
> Aihe: Re: [mapserver-users] [TinyOWS] TinyOWS 1.1.0 and the old good
> axis order trouble
> 
> 
>  
> 
> On Mon, Dec 17, 2012 at 11:16 AM, Rahkonen Jukka
> <Jukka.Rahkonen at mmmtike.fi> wrote:
> 
> 
> Hi Jukka,
> 
> Nice to see you again here :)
> 
> I have been running TinyOWS r558 for quite a long time because it is
> dealing almost right with the axis order of the projections I am
> commonly using. Now I had a fast try with the current TinyOWS 1.1.0
> version but unfortunately I realized that it is doing wrong thing by
> flipping the axis with urn:ogc:def:crs:EPSG::3067.
> 
> 
> On this topic we will not make any progress, without a regression
> test.
> (OGC CITE don't cover this issue)
> 
> Could you provide from a single point stored in the database,
> requests and answers awaited ?
> 
> I could also try to write it by myself too, 
> but will definitly need you to read it back,
> for all eastern stuff...
> 
> 
>         What is the logic that TinyOWS is using when it decides
>         whether the axis should be flipped or not  for WFS 1.1.0?
>         
> 
> Mainly 2 factors, as i recall:
>  - if it's SRS or CRS (meaning EPSG:xxxx or
> urn:ogc:def:crs:EPSG::xxxx)
>  - if SRTEXT contain both AXIS["X",NORTH]] and AXIS["Easting",EAST]]
>  
> 
> 
> -- 
> Olivier
> 
> 
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