WMS time question

[Eijnden, Bart van den (AGI)]

Hi Assefa,

so e.g. you would have (DD-MM-YYYY):

ROAD_SEGMENT_ID		MIN_DATE		MAX_DATE
1				01-01-2006		01-04-2006
2				01-03-2006		01-06-2006
etc.

So these represent validity, the road segment is valid/existant between MIN_DATE and MAX_DATE.

So if I want a map with the situation of 01-05-2006, 1 would not be on it, but 2 would be.

If I would want a map with the situation of 15-03-2006 until 15-04-2006, both would be on it.

Does this make sense?

Best regards,
Bart

-----Oorspronkelijk bericht-----
Van: UMN MapServer Users List
[mailto:MAPSERVER-USERS at LISTS.UMN.EDU]Namens Yewondwossen Assefa
Verzonden: donderdag 27 juli 2006 3:35
Aan: MAPSERVER-USERS at LISTS.UMN.EDU
Onderwerp: Re: [UMN_MAPSERVER-USERS] WMS time question


Bart,


Bart van den Eijnden (OSGIS) wrote:
> Hi list,
> 
> looking through the Mapserver WMS time HOWTO I wondered one thing, it is
> only possible to have 1 timeitem, a DB column which contains the
> date/time. Ofcourse this is pretty okay for satellite images (in a
> tileindex) which are taken every X days/months.
> 
> But what happens to road network segments (geometries in Oracle Spatial
> for instance) which have a minimum date and a maximum date? So you need to
> specify 2 timeitems (one min and one max) for that. Was this use case just
> not implemented?
> 

  What would the min/max date represent : the valid time extents or 
simply 2 time fields on which we can do a query ?
The wms request allows to  send a time value that is then compared to 
the value inside the timeitem. Would you expect to be able to compare 
the time request between the 2 timeitmes defined ?

> Best regards,
> Bart
> 


-- 
----------------------------------------------------------------
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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