time series problem 3 (Bug!?)
Luis W. Sevilla
cresques at GMAIL.COM
Thu Oct 13 20:40:41 EDT 2005
Hi,
Yewondwossen Assefa wrote:
> From the specs (wms 1.1 annex c c.3), the extent could be defined in 4
> ways :
> 1) value : A single value. This is not directly supported in
> Mapserver but there is an easy workwound by specifying the same value
> as min and max
>
> 2) value1,value2,value3,... a A list of multiple values. This is
> not supported in Mapserver.
>
> 3) min/max/resolution An interval defined by its lower and upper
> bounds and its resolution. This is supported in Mapserver (Note
> that the resolution is not supported)
It sounds quite strange: how do you specify the ammount of time-slices,
without giving the resolution?
>
> 4) min1/max1/res1,min2/max2/res2,... a A list of multiple
> intervals. Not supported
>
>
> I am willing to add the support for number 4) if you are willing to
> do additional testing.
We may do some testing too. we're on the way of developping a new WMS
cliente with time parameter support, and also interested in publising
multitemporal data on the same way.
>
> I am not sure if 2) is is a must have at this point.
>
> Le me know what you think and then we can proceed with the impentation.
>
> Later,
>
>
> Jeroen Ticheler wrote:
>
>> Thanks for that! Is it a complex thing to add such support? I had
>> the impression from the code that it was virtually there already,
>> just that it first checked for a range and does not proceed to check
>> for ranges?
>> The problem is that a range doesn't work for this series. Data comes
>> in at three 10 daily periods a month, which is not exactly true as a
>> month does not always have 30 days. Still the images are always
>> dated with a 01, 11 and 21 for the day (or 1,2 or 3 for a dekad).
>>
>> Ciao,
>> Jeroen
>> _______________________
>> Jeroen Ticheler
>> FAO-UN
>> Tel: +39 06 57056041
>> http://www.fao.org/geonetwork
>> 42.07436°N 12.34327°E
>>
>>
>> On 13 Oct 2005, at 20:03, Yewondwossen Assefa wrote:
>>
>>> Hi There,
>>>
>>> Sorry for the late answer.
>>>
>>> From what I can see in your examples, you are running into a
>>> limitation of mapserver and it's support for the time extent
>>> values. Currently the time extent can only be defined as a range
>>> value and only one range value is valid (so something like is the
>>> only thing valid 2005-09-11/2005-09-21)
>>>
>>> You should update your "wms_timeextent" and try it with only one
>>> range. I will enter documentation bug so that this limitation is
>>> clearly defined. Give it a try and let me know.
>>>
>>> Later,
>>>
>>> Jeroen Ticheler wrote:
>>>
>>>> Hi, sorry for continuing this story, but I really want to solve
>>>> this and hope my additional info helps to sort out the problems I
>>>> face.
>>>> I am using a shapefile with the imgdate column added to it. I use
>>>> exactly the same index to work with a WCS on the same data, that
>>>> one works perfectly fine.
>>>> I have browsed through the mapServer sourcecode to see if I could
>>>> discover something/ understand the problem better. I'm not
>>>> familiar with C coding, so forgive my ignorance :-) What I could
>>>> understand is that my request fails when the time string
>>>> submitted in the request is compared to the timeextent given in
>>>> the capabilities document.
>>>> The exact section of the code is in between line 545 and line
>>>> 569, apparently the msValidateTimeValue() procedure fails to find
>>>> the requested date in the extent. I do not get an error when I
>>>> change my extent to a range like
>>>> "2005-09-11,2005-09-21/2005-09-21" or
>>>> "2005-09-11,2005-09-11/2005-09-21", but it will only render the
>>>> very last image, even when an earlier one is requested.
>>>> So I guess I face a bug!?
>>>> Thanks again,
>>>> Jeroen
>>>> Begin forwarded message:
>>>>
>>>>> From: Jeroen Ticheler <Jeroen.Ticheler at FAO.ORG>
>>>>> Date: 12 October 2005 09:54:26 GMT+02:00
>>>>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>>>>> Subject: [UMN_MAPSERVER-USERS] time series problem 2
>>>>> Reply-To: Jeroen Ticheler <Jeroen.Ticheler at FAO.ORG>
>>>>>
>>>>>
>>>>> Further to my previous message, the exception I get is the
>>>>> following one:
>>>>>
>>>>> <ServiceExceptionReport version="1.1.1">
>>>>> <ServiceException code="InvalidDimensionValue">
>>>>> msWMSApplyTime: WMS server error. Time value(s) 2005-09-21 given
>>>>> is invalid or outside the time extent defined
>>>>> (2005-03-11,2005-03-21,2005-04-01,2005-04-11,2005-04-21,2005-05-01,2
>>>>> 00
>>>>> 5-05-11,2005-05-21,2005-06-01,2005-06-11,2005-06-21,2005-07-01,2005-
>>>>> 07
>>>>> -11,2005-07-21,2005-08-01,2005-08-11,2005-08-21,2005-09-01,2005-09-1
>>>>> 1, 2005-09-21), and default time set is invalid (2005-09-21)
>>>>> </ServiceException>
>>>>> </ServiceExceptionReport>
>>>>>
>>>>> And the URL's I use are:
>>>>>
>>>>> For Capabilities:
>>>>>
>>>>> http://193.43.36.137/cgi-bin/spotveg?
>>>>> version=1.1.1&service=WMS&request=GetCapabilities
>>>>>
>>>>> For a working map without specifying the time:
>>>>>
>>>>> http://193.43.36.137/cgi-bin/spotveg?
>>>>> version=1.1.1&service=WMS&request=GetMap&srs=EPSG:
>>>>> 4326&bbox=-180,-90,180,90&format=image/
>>>>> png&layers=spotndvi&transparent=true&width=400&height=200
>>>>>
>>>>> For a request with a time, the exception is returned:
>>>>>
>>>>> http://193.43.36.137/cgi-bin/spotveg?
>>>>> version=1.1.1&service=WMS&request=GetMap&srs=EPSG:
>>>>> 4326&bbox=-180,-90,180,90&format=image/
>>>>> png&layers=spotndvi&transparent=true&width=400&height=200&time=2005-
>>>>> 09 -21
>>>>>
>>>>> These URL's can be reached from outside, so you can try this
>>>>> yourself.
>>>>> Thanks in advance for any help to a solution,
>>>>> Jeroen
>>>>>
>>>>> On 11 Oct 2005, at 19:20, Jeroen Ticheler wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Hi,
>>>>>> I have a problem with time series for WMS. I have used the
>>>>>> following WMS attributes in my map file and I get the default
>>>>>> image the first WMS map request. The moment I start requesting
>>>>>> maps with the time variable set, I get an exception indicating
>>>>>> that the time format used is not correct.
>>>>>>
>>>>>> The data is GeoTIFF
>>>>>> I have an index shapefile with an imgdate column containing the
>>>>>> dates in the same format
>>>>>>
>>>>>> Anyone an idea, I can't find an example that has a whole range
>>>>>> of images with a specific time set for each image.
>>>>>>
>>>>>> Map file extract:
>>>>>>
>>>>>> At the map level (although I don't think this is supported/
>>>>>> needed for GeoTIFF data!?)
>>>>>> ____________________________
>>>>>> "wms_timeformat" "YYYY-MM-DD"
>>>>>> ____________________________
>>>>>>
>>>>>>
>>>>>> At the layer level
>>>>>> ____________________________
>>>>>>
>>>>>> "wms_style_default_title" "default"
>>>>>> "wms_format" "image/png"
>>>>>> "wms_timedefault" "2005-09-11"
>>>>>> "wms_timeextent"
>>>>>> "2005-08-21,2005-09-01,2005-09-11" # also tried with
>>>>>> spaces after each comma
>>>>>> "wms_timeitem" "imgdate"
>>>>>>
>>>>>> END
>>>>>> DUMP TRUE
>>>>>> TILEINDEX 'ndvi_idx'
>>>>>> TILEITEM "location"
>>>>>> EXTENT -180.0 -90.0 180.0 90.0
>>>>>> PROJECTION "init=epsg:4326" END
>>>>>> ____________________________
>>>>>>
>>>>>>
>>>>>> Thanks in advance,
>>>>>> Jeroen
>>>>>> _______________________
>>>>>> Jeroen Ticheler
>>>>>> FAO-UN
>>>>>> Tel: +39 06 57056041
>>>>>> http://www.fao.org/geonetwork
>>>>>> 12.34327°N 12.34327°E
>>>>>
>>> ----------------------------------------------------------------
>>> Assefa Yewondwossen
>>> Software Analyst
>>>
>>> Email: assefa at dmsolutions.ca
>>> http://www.dmsolutions.ca/
>>>
>>> Phone: (613) 565-5056 (ext 14)
>>> Fax: (613) 565-0925
>>> ----------------------------------------------------------------
>>
gvSIG development Team
www.gvsig.gva.es
More information about the mapserver-users
mailing list