RasterCS - sindizzy/DSW GitHub Wiki
Sample code that demonstrates how to open a raster and get the maximum value for the raster cells.
Be sure to install the GDAL extension if you want to view different types of files.
using DotSpatial.Data;
private void button1_Click(object sender, EventArgs e)
{
IRaster r = Raster.Open(@"C:\[Your File Path](Your-File-Path)\O44121a1.bgd");
r.GetStatistics();
double value = r.Maximum;
}