GIS map server is used in the SABR product search request form to select the search probe and to display the product data coverage.

Basic functionality of the map server includes:

• Centered zoom of the map using the buttons "zoom in" and "zoom out" .
• Fit of the selected rectangular region to the map window. Region to fit is selected with the map applet toolbar "lens". The new map is ordered by the click on the button "to rectangle" .
• Recenter the map according to the new center location selected by user. The new center on the map is selected with the map applet toolbar "lens" . The new map is ordered by the click on the button "recenter" .
• Move the map in any of the 8 main geographic directions (north, south, etc.) by 1/3 of the window size. The new map is ordered by the click on the correspoding direction arrow on the map applet margins.
• Zoom the map back to the original size preserving the selected map layers using the button "to global" .
• Overlay the default map with user selected layers. The layers are selected and unseleceted using checkboxes in the "Legend" region.The level of layer details is related to the zoom level of the map.
• Reset the map to initial state with the "reset" button .

On the margins of the map applet always are displayed:

• Lat/lon coordinates of the cursor location
• The map extent as lat/lon coordinates of the upper left (North-West) and the lower right (South-East) corners of the map window.
• Map applet toolbur state, may be either "selection" for search probe selection and "lens" for map server zoom and center functions.

The map scale is displayed below the map applet. The visible zoom region is overlayed over the original size map on the reference window below the map legend.