[OSGeo-Discuss] Input regarding Axis Order Confusion

[Arnulf Christl]

On Thu, December 14, 2006 23:52, Jody Garnett wrote:
> Good NeoGeographers are not the target audience that GeoTools page ...
>
> Okay - WMS with SRS:
> - "EPSG:4326" <== x,y everybody "happy"
> - "urn:ogc:def:crs:EPSG:6.6:4326" <=== exactly as defined by the EPSG
> database
>
> If you want to make it easy you need to publish a web service that takes
> the complexity away ...
>
> Provide a Web Service takes a "SRS" field and a normal x,y bounds, and
> returns the "correct" information for them.
>
> The webservice can have each EPSG database avalable in order to answer
> the hard questions, maybe with proj4 or GeoTools to help with producing
> the correct request.  In GeoTools we provide a WebMapServer class that
> has stratagy objects capturing what needs to be done for the different
> WMS versions, and in some cases the different implementations ....
>
> Cheers,
> Jody

Thanks again. Although I don't know where to put this either. Are we the
place for neogeographers? I was just pointing out that they might get into
trouble. Maybe Schuyler will know how to go about it (I have to check how
they covered this in Mapping Hacks...).

Regards, Arnulf.

>> Hey
>> thanx Paulo, Jody, Bob and all others for the input. As always good
>> input
>> from GeoTools. Problem is that this is way too long and complicated to
>> the
>> neogeographer.
>>
>> Schyler,
>> could you please reformulate your 1000 year pledge, I don't get it (soy
>> extranjero).
>>
>> So we are back at the start - or was it the end. My trouble with this is
>> that I have already seen way too many hmtl clients in the web hopping to
>> the right when you wanted to go left. With 1.3 applications will break
>> more often. This is not good. All we can do is keep the exposed
>> interfaces
>> really well isolated. Anything else might be added to the Wiki, I am
>> done
>> with this issue at this point.
>>
>> Regards, Arnulf.
>>
>> On Thu, December 14, 2006 19:32, Jody Garnett wrote:
>>
>>> Here is an interesting page to link to:
>>> - http://docs.codehaus.org/display/GEOTOOLS/The+axis+order+issue
>>>
>>> GeoTools is taking the stance of - provide a way for the application to
>>> handle the problem (because it will occur), with the recommendation
>>> that
>>> this control be passed onto the end user as an "advanced option" if
>>> needed.
>>>
>>> You will also find that for the new URI format of SRS used by WMS1.3 or
>>> WFS1.1 we believe the EPSG table order, the codes are only ambiguous in
>>> their more common "AUTHORY:NUMBER" form...
>>>
>>> Cheers,
>>> Jody
>>>
>>>> Hello,
>>>> if you are aware of anything that might enhance information regarding
>>>> the
>>>> great Axis Order Confusion that we are faced with in the spatial realm
>>>> please feel free to add it to this Wiki page:
>>>> http://wiki.osgeo.org/index.php/Axis_Order_Confusion
>>>>
>>>> There is some discussion going as to having to break WMS 1.1.1 (and
>>>> WFS
>>>> and SFS and probably everything) in order to rectify this problem
>>>> which
>>>> I
>>>> think is the end of the world. Well, ok maybe not quite but it will
>>>> make
>>>> things stall, so lets be reasonable on this.
>>>>
>>>> Thanks,
>>>>
>>>>
>>>>
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>>
>>
>>
>
>
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-- 
Arnulf Christl
http://www.ccgis.de