Changes between Version 29 and Version 30 of udg/ecoms


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Timestamp:
Mar 14, 2013 1:47:37 PM (9 years ago)
Author:
antonio
Comment:

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  • udg/ecoms

    v29 v30  
    5656The ''SPECS-EUPORIAS Data Portal'' can be accessed through the '''Data Portal URL''' provided in the abstract. First of all, an authentication dialog will request a valid user name and password.
    5757
    58 [[Image(loginTHREDDS.png,align=center,title=Authentication dialog)]]
     58[[Image(loginTHREDDS.png,align=right,width=320px,title=Authentication dialog)]]
    5959
    6060{{{#!comment
     
    7070Afterwards, the different datasets described in [#s.thredds TDS section] are listed as links in the web browser window. 
    7171
    72 [[Image(fig01.png,align=center,title=Catalog of the EUPORIAS-SPECS System4 datasets. Note that although they only include a few variables, their size range from one to four Terabytes)]]
     72[[Image(fig01.png,align=right,width=320px,title=Catalog of the EUPORIAS-SPECS System4 datasets. Note that although they only include a few variables, their size range from one to four Terabytes)]]
    7373
    7474{{{#!comment
     
    8686By clicking in any of the datasets, a new window will appear providing information on the variables and geospatial and time coverages, and offering different options for data access and/or visualization.
    8787
    88 [[Image(fig02.png,align=center,title=Detail of a particular dataset with information on the included variables and geospatial and time coverages. The different options for data access and visualization are also shown.)]]
     88[[Image(fig02.png,align=right,width=320px,title=Detail of a particular dataset with information on the included variables and geospatial and time coverages. The different options for data access and visualization are also shown.)]]
    8989
    9090{{{#!comment
     
    100100Currently, only the `OPeNDAP` access service is fully operative in the portal. Therefore, in this example, we will illustrate the use of this service, which allows selecting time/spatial data slices from the `OPeNDAP` data access form shown in Fig. \ref{fig:opendapwin} and downloading the resulting data in both ''ASCII'' and ''Binary'' formats.
    101101
    102 [[Image(openDAPwindow.png,align=center,title=Detail of the OPeNDAP dataset access form for a particular dataset.)]]
     102[[Image(openDAPwindow.png,align=right,width=320px,title=Detail of the OPeNDAP dataset access form for a particular dataset.)]]
    103103
    104104{{{#!comment
     
    122122The main disadvantage of the `OPeNDAP` service from the end-user point of view is that the specifications for subsetting dimensions are not given in their original magnitudes (i.e., latitudes and longitudes are not given in decimal degrees), but by the indexes of their position along their respective axes (note that first index value is always 0). Thus, to find out the indexes for the desired selection, we need to dump and analyze the particular values defined in the coordinate variable. For instance, Fig.~\ref{fig:latlonDump} shows the 241 values defined for the `lat` (latitude) coordinate, as provided by the ''Get ASCII'' option (selecting the corresponding check-box).
    123123
    124 [[Image(latlonDump.png,align=center,title=Text file displaying the values for the lat (latitude) coordinate variable.)]]
     124[[Image(latlonDump.png,align=right,width=320px,title=Text file displaying the values for the lat (latitude) coordinate variable.)]]
    125125
    126126{{{#!comment
     
    136136Using these facilities it can be obtained after some calculations that the closest `lat` and `lon` coordinates for a particular location of interest (e.g. `Madrid`) are 66 and 475, respectively. Thus, the time series for Madrid corresponding to the example described in the previous section (minimum temperature forecasts for January with one-month lead time, i.e. from the simulations started the first of December) could be requested as shown in Figure
    137137
    138 [[Image(opendapquery.png,align=center,title=Detail of the query from the OPeNDAP dataset access form to retrieve a subset (a time series for a single gridbox) of minimum temperature.)]]
     138[[Image(opendapquery.png,align=right,width=320px,title=Detail of the query from the OPeNDAP dataset access form to retrieve a subset (a time series for a single gridbox) of minimum temperature.)]]
    139139
    140140{{{#!comment