This example demonstrates how to create complex graphs and visualizations with SciChart iOS and macOS, and for example to visualize the LiDAR data.

LiDAR data can be collected from a variety of sources. We have used the publicly available data set of UAV data of one of the UK regions, which provides data in .asc format. Then we have used SCIScatterRenderableSeries3D with SCIPixelPointMarker3D and SCISurfaceMeshRenderableSeries3D to draw it on the chart.

You can see this graphics on your iPhone, iPad, and Mac desktop. It is used across domains anything from defence to energy, civil engineering and more.

Read more in SciChart Blog about LiDAR UAV 3D Point-cloud and Contour Visualisation in WPF,iOS,Android & Javascript

// LidarPointCloud.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2020. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// LidarPointCloud.m is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

#import "LidarPointCloud.h"
#import "SCDDataManager.h"

NSString *const SCDLIDARTQ38sw = @"tq3080_DSM_2M.asc";

@implementation LidarPointCloud

- (Class)associatedType { return SCIChartSurface3D.class; }

- (void)initExample {
    SCIColorMap *colorMap = [[SCIColorMap alloc] initWithColors:@[[SCIColor fromARGBColorCode:0xFF1E90FF], [SCIColor fromARGBColorCode:0xFF32CD32], SCIColor.orangeColor, SCIColor.redColor, SCIColor.purpleColor] andStops:@[@(0), @(0.2), @(0.5), @(0.7), @(1)]];
    
    SCINumericAxis3D *xAxis = [SCINumericAxis3D new];
    xAxis.axisTitle = @"X Distance (metres)";
    xAxis.textFormatting = @"0m";
    
    SCINumericAxis3D *yAxis = [SCINumericAxis3D new];
    yAxis.axisTitle = @"Y Distance (metres)";
    yAxis.textFormatting = @"0m";
    yAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:0 max:50];
    
    SCINumericAxis3D *zAxis = [SCINumericAxis3D new];
    zAxis.axisTitle = @"Height (metres)";
    zAxis.textFormatting = @"0m";

    SCDAscData *lidarData = [SCDDataManager ascDataFromFile:SCDLIDARTQ38sw];
    
    SCIScatterRenderableSeries3D *scatterSeries = [SCIScatterRenderableSeries3D new];
    scatterSeries.pointMarker = [SCIPixelPointMarker3D new];
    scatterSeries.dataSeries = [lidarData createXyzDataSeries];
    scatterSeries.metadataProvider = [lidarData createMetadataProviderWithColorMap:colorMap withinMin:0 andMax:50];
    
    unsigned int fillColors[5] = { 0xFF1E90FF, 0xFF32CD32, SCIColor.orangeColor.colorARGBCode, SCIColor.redColor.colorARGBCode, SCIColor.purpleColor.colorARGBCode };
    float fillStops[5] = { 0.0, 0.2, 0.5, 0.7, 1.0 };
    
    SCISurfaceMeshRenderableSeries3D *surfaceMeshSeries = [SCISurfaceMeshRenderableSeries3D new];
    surfaceMeshSeries.dataSeries = [lidarData createUniformGridDataSeries];
    surfaceMeshSeries.drawMeshAs = SCIDrawMeshAs_SolidWithContours;
    surfaceMeshSeries.meshColorPalette = [[SCIGradientColorPalette alloc] initWithColors:fillColors stops:fillStops count:5];
    surfaceMeshSeries.meshPaletteMode = SCIMeshPaletteMode_HeightMapInterpolated;
    surfaceMeshSeries.contourStroke = 0xFFF0FFFF;
    surfaceMeshSeries.contourStrokeThickness = 2;
    surfaceMeshSeries.minimum = 0;
    surfaceMeshSeries.maximum = 50;
    surfaceMeshSeries.opacity = 0.5;
    
    SCIZoomExtentsModifier3D *zoomExtentsModifier = [SCIZoomExtentsModifier3D new];
    zoomExtentsModifier.resetPosition = [[SCIVector3 alloc] initWithX:800 y:1000 z:800];
    zoomExtentsModifier.resetTarget = [[SCIVector3 alloc] initWithX:0 y:25 z:0];
    
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        self.surface.xAxis = xAxis;
        self.surface.yAxis = yAxis;
        self.surface.zAxis = zAxis;
        [self.surface.renderableSeries addAll:scatterSeries, surfaceMeshSeries, nil];
        [self.surface.chartModifiers addAll:[SCIOrbitModifier3D new], zoomExtentsModifier, [SCIPinchZoomModifier3D new], nil];
        
        [self.surface.camera.position assignX:800 y:1000 z:800];
        [self.surface.worldDimensions assignX:1000 y:200 z:1000];
    }];
}

@end

// LidarPointCloud.swift

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2020. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// LidarPointCloud.swift is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

class LidarPointCloud: SCDSingleChartViewController<SCIChartSurface3D> {
    
    override var associatedType: AnyClass { return SCIChartSurface3D.self }
    
    let LIDARTQ38sw = "tq3080_DSM_2M.asc"
    
    let colorMap = SCIColorMap(colors: [SCIColor.fromARGBColorCode(0xFF1E90FF), SCIColor.fromARGBColorCode(0xFF32CD32), .orange, .red, .purple], andStops: [0, 0.2, 0.5, 0.7, 1])
    
    override func initExample() {
        let xAxis = SCINumericAxis3D()
        xAxis.axisTitle = "X Distance (metres)"
        xAxis.textFormatting = "0m"
        
        let yAxis = SCINumericAxis3D()
        yAxis.axisTitle = "Y Distance (metres)"
        yAxis.textFormatting = "0m"
        yAxis.visibleRange = SCIDoubleRange(min: 0, max: 50)
        
        let zAxis = SCINumericAxis3D()
        zAxis.axisTitle = "Height (metres)"
        zAxis.textFormatting = "0m"
        
        let scatterSeries = SCIScatterRenderableSeries3D()
        scatterSeries.pointMarker = SCIPixelPointMarker3D()
        
        let surfaceMeshSeries = SCISurfaceMeshRenderableSeries3D()
        surfaceMeshSeries.drawMeshAs = .solidWithContours
        surfaceMeshSeries.meshColorPalette = SCIGradientColorPalette(
            colors: [0xFF1E90FF, 0xFF32CD32, SCIColor.orange.colorARGBCode(), SCIColor.purple.colorARGBCode()],
            stops: [0.0, 0.2, 0.5, 0.7, 1.0]
        )
        surfaceMeshSeries.meshPaletteMode = .heightMapInterpolated
        surfaceMeshSeries.contourStroke = 0xFFF0FFFF
        surfaceMeshSeries.contourStrokeThickness = 2
        surfaceMeshSeries.minimum = 0
        surfaceMeshSeries.maximum = 50
        surfaceMeshSeries.opacity = 0.5
        
        if let lidarData = SCDDataManager.ascData(fromFile: LIDARTQ38sw) {
            scatterSeries.dataSeries = lidarData.createXyzDataSeries()
            scatterSeries.metadataProvider = lidarData.createMetadataProvider(with: colorMap, withinMin: 0, andMax: 50)
            
            surfaceMeshSeries.dataSeries = lidarData.createUniformGridDataSeries()
        }
        
        let zoomExtentsModifier = SCIZoomExtentsModifier3D()
        zoomExtentsModifier.resetPosition = SCIVector3(x: 800, y: 1000, z: 800)
        zoomExtentsModifier.resetTarget = SCIVector3(x: 0, y: 25, z: 0)
        
        SCIUpdateSuspender.usingWith(surface) {
            self.surface.xAxis = xAxis
            self.surface.yAxis = yAxis
            self.surface.zAxis = zAxis
            self.surface.renderableSeries.add(items: scatterSeries, surfaceMeshSeries)
            self.surface.chartModifiers.add(items: SCIOrbitModifier3D(), zoomExtentsModifier, SCIPinchZoomModifier3D())
            
            self.surface.camera.position.assignX(800, y: 1000, z: 800)
            self.surface.worldDimensions.assignX(1000, y: 200, z: 1000)
        }
    }
}

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