EUROSEISMIC

Help on Seismics and Sonar Search

The Seismic and Sonar search screen is divided into 2 sections The upper sections contains all the tools to manipulate the map and is subdivided into

Map area
Tools
Legend
Search layer
Other layers
Geowindow search

See also figure 1.

The lower section is called: 'Search in seismic metadata'

Figure 1

1. Map area

At start up, the map is showing contour rectangles (black boundary, hatched green) of all seismic surveys present in the database.
The layers Bathymetry lines and Grid are also "on"
The legend explains the colours used on the map.

2. Tools (from left to right and then downward)

Zoom in: Zoom in on map.

Zoom out: Zoom out on map.

Recenter: Select a new centre of the map.

Identify: Click a single point on the map. Depending on how much you are zoomed in and how many surveys there are on that location, you get one or many results. The results will appear in a new window. You can only identify on seismic surveys.

Select by box: Select a couple of surveys on the map in a specified area (click on the map, hold the mouse button and drag). The corner coordinates of the box created will fill the geowindow on the right.

Distance measurement: After clicking on this button, click on the map and drag a line between the points you want to measure. Hold the left mouse button while you do this. At the top of the map (to the right of the coordinates) will be shown the distance between the points in kilometres.

Reset map Zoom back out to the start screen.

Enlarge: Enlarge the map in a new window, to improve it for printing purposes.

Help: The help-section on the map functionalities.

Position: At the top-left of the map the location of the mouse pointer on the map will be shown.

Index: A small overview map in the top-right of the map will show which part of Europe is shown on the map.

'shopping' basket overview Shows the number of selected surveys and line for export

Basket Opens the shopping basket

Reset Empties the shopping basket

3. Legend
The legend of the map area

4. Search layer
Layers can be switched on and off by ticking the check boxes next to the layer names AND subsequently clicking on the 'Refresh' button immediately below the list of layers. In this layer you can select 'lines' or 'surveys' depending on what type of information you want to search for in 'Search in seismic metadata'. If you select 'lines' you will find only line data and vice versa.

5. Other layers

Geological samples: shows the location of bottom samples and shallow bore holes
Bathymetry: shows the bathymetry in 500 meter intervals and the 200 meter contour
Grid lines: Shows a geographical grid
Survey/line id: Shows all id's of lines and surveys present in the database
Sample id: shows the id's of geological samples and bore holes

The layer control works in all separate windows showing the map area within the application.

6. Extra - Geowindow Latitude/longitude
In the boxes just to the right of the map, the coordinates (longitude/latitude) of the upper-left corner and the lower right corner of the preferred select box can be filled in decimal degrees manually.

Search in Seismic metadata

At the bottom of the opening page you will find the search criteria (figure 1: 7). With the criteria the query on the database with seismic surveys can be made. Choose one or more criteria from the lists before you press search. Remember that the narrower your search is, the less chance you have of getting results.

The principles for search on the database are the following:

Fill in one or more of the search criteria (You are able to combine this with an area on the map drawn with the 'Select by box' tool)
Then press the "Search" button.
The results (selected seismic surveys) are displayed in a new window.

1. The result window (see figure 2)
The result window displays an overview map showing the result of your search and to the right a page showing detailed information of the first object in your result list including a detail map showing the location of this object. On the overview map you will see a yellow frame indicating the location of the detail map in the overview map.

Figure 2

Use the i-function (identify) to point out directly which survey or line from the results you would like to see details from. Clicking on the map will show the nearest line or polygon. "Nearest" means that the application will look for the nearest line- or polygon-coordinate. In corners you are always sure to find a coordinate, straight lines might only have coordinates at the endpoints.

2. Extra tools in the result window
Some tools used in the map area (see above) can also be used in the map in the result window. However, there are a few extra tools present:
On the left:(see figure 2)

Enlarge: shows a large picture of the map. You can use this for printing or you can save the picture to be used in publications, reports etc.
Position: Shows the geographic position of your cursor
Index: Displays an inset map showing the location of the results window overview map in the initial map area.

On the right:

Add to export list: Add this object to the list of objects I want to export (see below)
Print the detailed description: Prints the detailed information about the current object

3. Export data to XML or Mapinfo import/export format(See figure 2)
You are able to select objects from your search result, collect them in an export list or 'basket' and export this 'basket to XML or Mapinfo import/export format (mid/mif).

In the result window click on the 'add to export list' icon next to the object in the results list or above the detailed information.
Do another search if you wish and collect more objects in your export list.
When you are finished, go back to the initial screen and click on 'Basket' in the tools section to check your export list.
In the 'basket' window there are further instructions on how to manipulate and export this list.
You can empty the list by clicking on the 'Reset' icon in the tools section.