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 <[EMAIL PROTECTED]>
Date: 12 October 2005 09:54:26 GMT+02:00
To: [email protected]
Subject: [UMN_MAPSERVER-USERS] time series problem 2
Reply-To: Jeroen Ticheler <[EMAIL PROTECTED]>
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: [EMAIL PROTECTED]
http://www.dmsolutions.ca/
Phone: (613) 565-5056 (ext 14)
Fax: (613) 565-0925
----------------------------------------------------------------
gvSIG development Team
www.gvsig.gva.es
