Marine Geoscience Data System

GeoMapApp

Help: Exporting Grids for Fledermaus

Gridded data held within GeoMapApp can now be exported in *sd file format for viewing in the Fledermaus 3D visualization software suite (Fledermaus Professional, Fledermaus Standard, and iView3D)


Exporting from the Global-Multi Resolution Topography Data Set

The Global Multi-Resolution Topography (GMRT) Data Set is a continuously-updated compilation of seafloor topography derived from multibeam bathymetry data from throughout the global and coastal oceans, merged with lower-resolution bathymetric compilations including satellite predicted bathymetry (Smith & Sandwell), the International Bathymetric Chart of the Arctic Ocean (IBCAO), and the SCAR Subglacial Topographic Model of the Antarctic (BEDMAP) and ~100 m resolution land topography data from the Shuttle Radar Topography Mission (SRTM).

Step 1 - Select the grid icon grid to load our Global Multi-Resolution Topography (GMRT) grid.

Step 2 - Zoom to an area of interest using the zoom grid gridand pan gridtools.

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Step 3 - Use the Color Palette Tool in the Grid Options Dialogue to set the color maps and sun illumination parameters.

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Step 4 - Press the save icon save and select "Save grid (Fledermaus SD format)", then follow the Save dialogue instructions to save the SD file.
Note: By default, if the latitude of the region of interest is greater than 50 ° North or less than 50 ° South, the grid projection will be geo-referenced; for higher latitudes, the SD file will be saved in a Mercator approximation. However, the user is given the option to override the default.

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Step 5 - Open iView3D; load and explore the SD file:

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Exporting Contributed Grids

Step 1 - Show contributed grids by selecting the contributed grids icon contgrid in the main toolbar.
Note: If the GMRT grid was loaded, first dispose of it by pressing the grid button grid for better performance.

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Step 2 - Zoom to a contributed grid of interest using the zoom grid gridand pan gridtools.

Step 3 - Left Click within the boundaries of the contributed grid of interest (the boundaries of the box will turn white when selected), then then Right Click to load it:

ivscontr

Step 4 - Use the Color Palette Tool in the Grid Options Dialogue to set the color maps and sun illumination parameters. Note: if the Color Palette Tool is not visible, press the Open Object lightbulb button in the Layers Dialogue window to activate it.

gopt

Step 5 - Press the save icon save in the main GeoMapApp toolbar and select "Save grid (Fledermaud SD format)", then follow the Save dialogue instructions to save the SD file.
Note: By default, if the latitude of the region of interest is greater than 50 ° North or less than 50 ° South, the grid projection will be geo-referenced; for higher latitudes, the SD file will be saved in a Mercator approximation. However, the user is given the option to override the default.

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Step 6 - Open iView3D; load and explore the SD file:

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