C++ LSDRaster::RemoveBelow方法代码示例

//.........这里部分代码省略.........
    raster_selection.push_back(0);
    raster_selection.push_back(0);

    int CurrentWindowSize = window_radius;

    vector<LSDRaster> Surfaces = FilledDEM.calculate_polyfit_surface_metrics(CurrentWindowSize, raster_selection);
    LSDRaster slope = Surfaces[1];
    LSDRaster aspect = Surfaces[2];

    cout << "\nGetting drainage network and basins\n" << endl;

    // get a flow info object
  	LSDFlowInfo FlowInfo(BoundaryConditions,FilledDEM);

    //get stream net from channel heads
    stringstream ss_ch;
    ss_ch << Path << "Pelletier/" << Prefix << "_" << Resolutions[a] << "_CH";

    vector<int> sources = FlowInfo.Ingest_Channel_Heads(ss_ch.str(), "bil");
    LSDJunctionNetwork ChanNetwork(sources, FlowInfo);
    LSDIndexRaster StreamNetwork = ChanNetwork.StreamOrderArray_to_LSDIndexRaster();

    //Extract basins based on input stream order
    vector< int > basin_junctions = ChanNetwork.ExtractBasinJunctionOrder(BasinOrder, FlowInfo);
    LSDIndexRaster Basin_Raster = ChanNetwork.extract_basins_from_junction_vector(basin_junctions, FlowInfo);

    cout << "\nExtracting hilltops and hilltop curvature" << endl;

    // extract hilltops - no critical slope filtering is performed here
    LSDRaster hilltops = ChanNetwork.ExtractRidges(FlowInfo);

    //get hilltop curvature using filter to remove positive curvatures
    LSDRaster cht_raster = FilledDEM.get_hilltop_curvature(Surfaces[3], hilltops);
    LSDRaster CHT = FilledDEM.remove_positive_hilltop_curvature(cht_raster);

    cout << "Starting hilltop flow routing\n" << endl;

    // these params do not need changed during normal use of the HFR algorithm
    bool print_paths_switch = false;
    int thinning = 1;
    string trace_path = "";
    bool basin_filter_switch = false;
    vector<int> Target_Basin_Vector;

    //run HFR
    vector< Array2D<float> > HFR_Arrays = FlowInfo.HilltopFlowRouting(FilledDEM, hilltops, slope, StreamNetwork, aspect, Filename_variable, Basin_Raster, Surfaces[4], print_paths_switch, thinning, trace_path, basin_filter_switch, Target_Basin_Vector);

    LSDRaster HFR_LH = hilltops.LSDRasterTemplate(HFR_Arrays[1]);
    LSDRaster relief = hilltops.LSDRasterTemplate(HFR_Arrays[3]);

    //Filter Relief and LH data to remove any values < 2 pixels, as in Grieve et al (2015)
    LSDRaster LH1 = HFR_LH.RemoveBelow(2.0*Resolutions[a]);
    LSDRaster Relief1 = relief.RemoveBelow(2.0*Resolutions[a]);

    //Filter Relief and LH data to remove any values > 10000
    //These are created due to using 1m channel heads on low res data, and inadvertantly
    //sampling nodata values, which gives us massive relief values
    LSDRaster LH = LH1.RemoveAbove(10000);
    LSDRaster Relief = Relief1.RemoveAbove(10000);

    //go through the lh raster and get every value into a 1D vector
    vector<float> LH_vec = Flatten_Without_Nodata(LH.get_RasterData(), LH.get_NoDataValue());
    vector<float> Boxplot = BoxPlot(LH_vec);

    //write the values to the output file
    WriteLHData << Resolutions[a] << " " << Boxplot[0] << " " << Boxplot[1] << " " << Boxplot[2] << " " << Boxplot[3] << " " << Boxplot[4] << " " << Boxplot[5] << " " << Boxplot[6] << " " << Boxplot[7];

    WriteLHData << endl;

    stringstream ss3;
    ss3 << Path << Prefix << "_" << Resolutions[a] << "_Hist_LH_variable.txt";
    print_histogram(LH_vec, 1, ss3.str());

    //go through the relief raster and get every value into a 1D vector
    vector<float> R_vec = Flatten_Without_Nodata(Relief.get_RasterData(), Relief.get_NoDataValue());
    vector<float> Boxplot_R = BoxPlot(R_vec);

    //write the values to the output file
    WriteRData << Resolutions[a] << " " << Boxplot_R[0] << " " << Boxplot_R[1] << " " << Boxplot_R[2] << " " << Boxplot_R[3] << " " << Boxplot_R[4] << " " << Boxplot_R[5] << " " << Boxplot_R[6] << " " << Boxplot_R[7];

    WriteRData << endl;

    stringstream ss4;
    ss4 << Path << Prefix << "_" << Resolutions[a] << "_Hist_R_variable.txt";
    print_histogram(R_vec, 1, ss4.str());

    //if the user requests the rasters to be written, write the rasters
    if (WriteRasters == 1){
      cout << "Writing Rasters\n" << endl;

      Surfaces[1].write_raster((Filename + "_Slope_variable"), DEM_Format);
      CHT.write_raster((Filename + "_CHT_variable"), DEM_Format);
      LH.write_raster((Filename + "_HFR_LH_variable"), DEM_Format);
      Relief.write_raster((Filename + "_Relief_variable"), DEM_Format);

    }
  }
    WriteLHData.close();
    WriteRData.close();
}