Try take a look at the create_dfs2.m example within the DHI MATLAB Toolbox. This creates a dfs2 file with multiple items and time steps.
A bathymetry dfs2 file only needs one item and one time step. Below I have copied in some code that does this for a bathymetry matching the Oresund example from the MIKE 21 installed examples. This is C# code, so you will need to translate it to MATLAB, but matching it with the create_dfs2.m example should show you all the tricky bits.
What you need to modify in the code below is:
[list]
[li]Projection information[/li]
[li]Temporal information - temporal axis - start time[/li]
[li]Spatial information - spatial axis - dx, dy, size in x and y direction (n x m)[/li]
[li]M21_Misc custom block: first value (327f) is rotation, which must match the rotation from the projection information. The 10f is the land value.[/li]
[/list]
And then you need to create the array of bathymetry data to write to the file, the "[tt]float[] bathyData[/tt] = ..." below.
Best regards
Jesper
[hr]
[code]
DfsFactory factory = new DfsFactory();
Dfs2Builder builder = Dfs2Builder.Create(@"C:\0\Training\Bat1_0.dfs2", @"Grid editor", 1);
// Set up the header
builder.SetDataType(0);
builder.SetGeographicalProjection(factory.CreateProjectionGeoOrigin("UTM-33", 12.438741600559911, 55.2257078424238, 327));
builder.SetTemporalAxis(factory.CreateTemporalEqCalendarAxis(eumUnit.eumUsec, new DateTime(2003, 01, 01, 0, 0, 0), 0, 1));
builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUmeter, 72, 0, 900, 94, 0, 900));
builder.DeleteValueFloat = -1e-30f;
builder.AddCustomBlock(factory.CreateCustomBlock("Display Settings", new int[] { 1, 0, 0 }));
builder.AddCustomBlock(factory.CreateCustomBlock("M21_Misc", new float[] { 327f, 0f, -900f, 10f, 0f, 0f, 0f }));
// Set up dynamic items
builder.AddDynamicItem("Bathymetry", eumQuantity.Create(eumItem.eumIWaterLevel, eumUnit.eumUmeter),
DfsSimpleType.Float, DataValueType.Instantaneous);
// Create and get file
builder.CreateFile(filename);
Dfs2File file = builder.GetFile();
// Add bathymetry data
float[] bathyData = ...
file.WriteItemTimeStepNext(0, bathyData);
file.Close();
[/code]
