temporal queries via WFS

[Kralidis,Tom [Burlington]]

Assefa,

Thanks for the info.  What about doing it like this:

- WFS filter is sent
- mapwfs.c checks mapfile to see if LAYER/METADATA/"ows_timefield" matches Property element
 - if yes, do a time-enabled expression
 - if no, do a literal expression as per usual

Comments?

..Tom



-----Original Message-----
From:	UMN MapServer Users List on behalf of Yewondwossen Assefa
Sent:	Tue 20-Dec-05 14:00
To:	MAPSERVER-USERS at LISTS.UMN.EDU
Cc:	
Subject:	Re: [UMN_MAPSERVER-USERS] temporal queries via WFS
Tom,

 This end up to be setting the expression as It was a litteral 
expression instead of setting it using the back tics that indicates to 
mapserver to do time comparing (`[time_field]` ge `2004-10-12`). There 
is no detection right now to see if the filer parameters are time values 
or not. Not even sure how we should detect it. If we can find a way or 
logic to indicate that the value is a time, setting the filter is pretty 
easy.

Later,
Kralidis,Tom [Burlington] wrote:

>Hi,
>
>I'd like to do a GetFeature request, something like:
>
>http://devgeo.cciw.ca/cgi-bin/mapserv/ecows?service=WFS&version=1.0.0&request=GetFeature&typename=obs&filter=<Filter><PropertyIsGreaterThan><Property>datetime</Property><Literal>2002-10-30T00:00:00Z</Literal></PropertyIsGreaterThan></Filter>
>
>The result should bring back two results (i.e. more recent than 2002), but returned are all the records.  The data is configured for WMS Time support.
>
>Is it possible to do temporal slices in MapServer WFS in this fashion?
>
>..Tom
>  
>


-- 
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Assefa Yewondwossen           
Software Analyst   

Email: assefa at dmsolutions.ca    
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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