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 23-Sep-2014
 EO Data Access How to Apply How to Access

## 6.1. Overview

The figure below displays the main functional areas in the Catalogue workspace.

1. set a date/time interval of your interest in the Date panel;

2. set an area of your interest in the Map or in the Area panel;

3. submit a query via the Search Catalogue button;

4. view the result items of your query as metadata in the Table of Results, as images in the Thumbnail list, and as Footprints on the Map;

5. select one or several items in the Table of Results.

## 6.3. Setting the catalogue search criteria

### 6.3.1. Selecting a collection

When selected, Collections which are the leaves of the tree, have a red tick in the check box. A branch of the tree will have a red tick if all collections within this branch are selected, and a white tick if only some of the collections are selected.

Note that the more collections you select, the slower the performance of your query will be.

 You can resize the collection panel by moving (click and drag) the separator bar between the collection and Area/Date panels.

### 6.3.2. Defining an area of interest

EOLI-SA offers several ways to define a search area:

#### 6.3.2.7. Selecting compound areas

It is possible to define several areas of interest which can be used simultaneously in a catalogue search. Compound areas must be defined graphically on the map as follows:

1. Repeat this process for all additional areas, pressing the Shift key while drawing the area by clicking (and dragging on the classic 2D map)

### 6.3.3. Setting a date range

You should further refine your search by defining a specific time interval for the acquisition of data.

This is done within the Date panel ( Figure 6.11, “The Date panel” ) in several different ways:

#### 6.3.3.1. Using the calendar

You can select the dates from the calendar pop-up ( Figure 6.12, “Using the calendar to select date” ). Click on the calendar icon to open the calendar.

#### 6.3.3.2. Using a pre-defined date range

You can select the date range from the Choose a Date drop-down menu ( Figure 6.13, “Using the pre-defined date range to select a date” ). In the example, the date range is moved to the following week by selecting Next Week.

#### 6.3.3.4. Using manual input

You can enter a date range in the text fields ( Figure 6.11, “The Date panel” ). Several formats are supported:

1. dd-mm-yyyy

2. dd/mm/yyyy

3. dd-mm-yy

4. dd/mm/yy

#### 6.3.3.5. Using No Date

This is useful when:

1. you want to search the complete mission on a reasonably small area;

2. you are searching for a particular orbit (see Section 6.3.4, “Advanced criteria” ) and you want to avoid the date criteria to interfere with the orbit criteria (if the specified orbit is not within the specified date range, no results can be found).

The Advanced criteria are shown below the Date and Area panels. Use the criteria panel vertical scroll bar to view them (if necessary).

By default, there is one advanced criteria panel for each selected collection.

 Using the Group Criteria check box, you may re-group the advanced criteria that are common to all selected collections. Common advanced criteria are shown below the Date/Area panel, in a panel named "Grouped criteria"

Advanced criteria allow you specifying collection-specific parameters.

The most common criteria are (depending on the selected collections):

1. No Frame/Show Frame options. If No Frame is selected, results of your search will appear as striplines (i.e. segment of acquisitions of various lengths). If Show Frame is selected, the results are cut into standard frames. In addition, you can also use a frame range criteria.

2. Orbit range. You can enter a range of orbits. If you search for one specific orbit only, you can leave the "to:" field empty.

3. Frame range. This criterion is visible only if you have selected the Show Frame option. If you search for one specific frame only, you can leave the "to:" field empty

4. Track.

5. Pass Type (Ascending or Descending).

6. Swath (where applicable).

7. Status. This is supported in local collections only. You can select one of several statuses. When none are selected, the status criteria are not used.

## 6.5. Search Catalogue and retrieving results

To submit the query, click the Search Catalogue button on the Toolbar at the bottom of the screen.

Check one or several boxes corresponding to the wanted group results and press the Append button to retrieve the results and append them to the previous results already loaded in the Table of Results.

 You can select or unselect all the Result Groups clicking on the select/unselected all groups to be retrieved / buttons.

At any time, as long as your session does not time out, you can click the Results button in the Tool bar to access the Search Result window and select other group(s) for retrieval.

Using the next/previous group results button arrows , you may retrieve the previous and the following group of results. This will replace the current results shown in the Table of Results. The next/previous group buttons are inactive if there is no next or previous group of results to be retrieved.

## 6.6. Adding a Local Collection

The Local Collections (or CD Collections) is a branch of the Collection Tree where you can manage your local collections ( Figure 6.20, “The Collections Tree” ). New local collections can be added from the server (or from a CD-ROM).

With Local Collections, you can:

1. work in off-line mode ( Section 5.1, “On-line and off-line mode” );

2. query the catalogue for interferometric searches ( Section 6.7, “Interferometric searches” ).

### 6.6.2. Indexing a remote or local repository

You can now create your own collections from a remote or a local repository. This option is only available when configured on Eoli Server by the operation team.

If the configuration templates are available, the content of this section will be valid. Otherwise the menu item options will not be present.

Note that to index a collection on your file system, you must be sure that the file names are in accordance with the normalized file name format of the reference collection.

1. To create a indexed collection on your Local Collection tree, right-click on a branch or the root of the Local Collections branch where you want the collection to be. A menu appears; select the "Create a local collection that indexes a product repository..." item.

2. You can then select a pre-configured product to index. When selected, you are able to change the parameters for the indexer. Change the collection name and the other parameters.

• The "Location of product repository" should be under the format protocol://hostname[:port]/path. The port can be ommitted. The protocol can be ftp, http or https.

For a local collection (on your system), write the full file path in the field or click the button "Select folder", like /home/path/to/local/repository or C:\path\to\local\repository

• The "Name of collection" is the name that will appear in your local collection tree.

• The "Credentials" "Username" and "Password" are needed to connect to FTP servers, and sometimes to HTTP or HTTPS servers.

3. By clicking on "Advanced configuration" you can have access to other usefull options and see the non-changeable parameters for the product.

4. When you are finished, click on "Save and Index". The reference collection will first be added to your local collection tree, then the indexer will index the configured repository. Note that the progress bar can go backwards if the indexing is recursive and more folders are found.

5. If no error dialog appears, you can then search this collection like any other collection. If you cannot find any item, then maybe the configuration is wrong (wrong swath additional attribute...) or the files on the repository don't match the product filter nor the parsing pattern. Look in the eolisa.log file for more details and re-configure and re-index the collection.

## 6.7. Interferometric searches

### 6.7.3. Retrieving Interferometric results

To submit the query, click on the Search Catalogue button.

Results are grouped into pairs. In the Table of Results ( Figure 6.33, “Interferometric search results” ), each pair is represented by 3 lines. The lines are grouped together via the group column:

1. the first line characterizes the interferometric product: It gives indication on the pair itself. The group identifier for this line is referenced as N-1 (N being the reference number of the pair);

2. the second line characterizes the reference (Master) acquisition. The group identifier is referenced as N-2;

3. the third line characterizes the matching (slave) acquisition. The group identifier is referenced as N-3.

Interferometric search result items can be browsed and selected as described in Section 4.3, “Browsing, selecting and exporting items” , with the following additional possibilities:

1. you can select all items composing a pair by clicking on the corresponding first line (this selects the 3 lines).

2. One selected, you can add the whole pair to your User Set workspace, preserving the first line and the information it contains.

Detailed information related to the Master/Slaving acquisitions or to the interferometric product can be displayed as described in Section 4.3.2, “Item detailed information” .

The Interferometric Product Details window contains :

1. general information on the current interferometric product;