Warp or Reproject Raster Layers in GIS using C#

Reproject layer to WGS84 spatial reference on GeoTIFF samples

Aspose.GIS API lets you convert a raster layer from one spatial reference to another and apply new sizes as shown in the code snippet below.

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
string filesPath = RunExamples.GetDataDir();
using (var layer = Drivers.GeoTiff.OpenLayer(Path.Combine(filesPath, "raster_float32.tif")))
using (var warped = layer.Warp(new WarpOptions(){Height = 40, Width = 40, TargetSpatialReferenceSystem = SpatialReferenceSystem.Wgs84}))
{
    // read and print raster
    var cellSize = warped.CellSize;
    var extent = warped.GetExtent();
    var spatialRefSys = warped.SpatialReferenceSystem;
    var code = spatialRefSys == null ? "'no srs'" : spatialRefSys.EpsgCode.ToString();
    var bounds = warped.Bounds;
    var bandCount = warped.BandCount;

    Console.WriteLine($"cellSize: {cellSize}");
    Console.WriteLine($"extent: {extent}");
    Console.WriteLine($"spatialRefSys: {code}");
    Console.WriteLine($"bounds: {bounds}");
    Console.WriteLine($"bandCount: {bandCount}");

    // read and print bands
    for (int i = 0; i < warped.BandCount; i++)
    {
        var dataType = warped.GetBand(i).DataType;
        var hasNoData = !warped.NoDataValues.IsNull();
        var statistics = warped.GetStatistics(i);

        Console.WriteLine();
        Console.WriteLine($"Band: {i}");
        Console.WriteLine($"dataType: {dataType}");
        Console.WriteLine($"statistics: {statistics}");
        Console.WriteLine($"hasNoData: {hasNoData}");
        if (hasNoData)
            Console.WriteLine($"noData: {warped.NoDataValues[i]}");
    }
}

Resize cell size in the raster layer on GeoTIFF samples

Aspose.GIS API lets you resize cells size in raster a layer as shown in the code snippet below.

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
string filesPath = RunExamples.GetDataDir();
using (var layer = Drivers.GeoTiff.OpenLayer(Path.Combine(filesPath, "raster_float32.tif")))
{
    Extent sourceExtent = layer.GetExtent();
    var newExtent = new Extent(
        sourceExtent.XMin,
        sourceExtent.YMin,
        sourceExtent.XMin + sourceExtent.Width * 0.5,
        sourceExtent.YMax + sourceExtent.Height * 0.5,
        layer.SpatialReferenceSystem);
    using (var warped = layer.Warp(new WarpOptions() { CellWidth = 120, CellHeight = 120, TargetExtent = newExtent }))
    {
        // read and print raster
        var cellSize = warped.CellSize;
        var extent = warped.GetExtent();
        var spatialRefSys = warped.SpatialReferenceSystem;
        var code = spatialRefSys == null ? "'no srs'" : spatialRefSys.EpsgCode.ToString();
        var bounds = warped.Bounds;

        Console.WriteLine($"cellSize: {cellSize}");
        Console.WriteLine($"source extent: {sourceExtent}");
        Console.WriteLine($"target extent: {extent}");
        Console.WriteLine($"spatialRefSys: {code}");
        Console.WriteLine($"bounds: {bounds}");
    }
}