Add image based on extent

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11-14-2019 08:22 AM
MattStayner
Occasional Contributor

Is it possible to add an image to a map based on an extent? In ArcGIS JS 3.X I can create a MapImageLayer and add a MapImage to it. See my demo here. I would like to do something similar in AppStudio.

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LucasDanzinger
Esri Frequent Contributor

You can do this with a KmlGroundOverlay with 100.6 and newer of Runtime. Basically you set the image and an Envelope of where it should display in geographic space. A sample can be found here:

arcgis-runtime-samples-qt/EditKmlGroundOverlay.qml at v.next · Esri/arcgis-runtime-samples-qt · GitH... 

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ErwinSoekianto
Esri Regular Contributor

I am including ArcGIS Runtime SDK for Qt‌ to see if this is possible in ArcGIS Runtime or anyone on that group know how to do that. 

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LucasDanzinger
Esri Frequent Contributor

You can do this with a KmlGroundOverlay with 100.6 and newer of Runtime. Basically you set the image and an Envelope of where it should display in geographic space. A sample can be found here:

arcgis-runtime-samples-qt/EditKmlGroundOverlay.qml at v.next · Esri/arcgis-runtime-samples-qt · GitH... 

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MattStayner
Occasional Contributor

Erwin Soekianto Thanks for the quick response!

Lucas Danzinger‌ Yes, that is perfect! I love how KmlGroundOverlay can be defined using very similar parameters to the MapImageLayer class from Javascript 3.x (e.g. xmin, ymin, xmax, ymax, spatial reference). Thanks!

I have a quick follow up question, I noticed when I changed from a sceneView to a mapView the transparency slider stopped working (see below). Do you happen to know what that is about?

import QtQuick 2.7
import QtQuick.Controls 2.3

import ArcGIS.AppFramework 1.0
import ArcGIS.AppFramework.Controls 1.0
import Esri.ArcGISRuntime 100.6
//import Esri.ArcGISExtras 1.1

App {
    id: app
    width: 400
    height: 640


    Rectangle {
        id: rootRectangle
        clip: true
        width: 800
        height: 600

        readonly property url dataPath: ""

        MapView {
            id: mapView
            anchors.fill: parent

            Map {
                BasemapImagery {}

                initialViewpoint: viewpoint
                ViewpointCenter {
                    id:viewpoint
                    Point {
                        x: -123.066227926904
                        y: 44.04736963555683
                        SpatialReference {
                            wkid: 4326
                        }
                    }
                    targetScale: 15000

                }

                // Create a KML Layer
                KmlLayer {
                    id: kmlLayer
                    // Create a KML Dataset
                    KmlDataset {
                        // Create a Ground Overlay by assigning an icon and geometry
                        KmlGroundOverlay {
                            id: groundOverlay
                            rotation: -3.046024799346924
                            KmlIcon {
                                url: "C:/Users/mstay/ArcGIS/AppStudio/Apps/EditKmlGroundOverlay/1944.jpg"
                            }
                            Envelope {
                                id: env
                                xMin: -123.066227926904
                                yMin: 44.04736963555683
                                xMax: -123.0796942287304
                                yMax: 44.03878298600624
                                SpatialReference {
                                    wkid: 4326
                                }
                            }
                        }
                    }
                }
            }
        }

        Rectangle {
            anchors.fill: slider
            radius: 5
        }

        Slider {
            id: slider
            anchors {
                left: parent.left
                top: parent.top
                margins: 10
            }
            from: 0
            to: 1
            value: 1
            stepSize: 0.1
            onValueChanged: {
                // modify the overlay's color/alpha value
                groundOverlay.color = Qt.rgba(0, 0, 0, value);
            }
        }
    }
}
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LucasDanzinger
Esri Frequent Contributor

Not sure why - probably a bug in the API. If you use the opacity property on the KmlLayer (inherited from Layer base class) instead of setting color, that seems to work, so maybe give that a try if you are just looking to modify opacity. Please log a bug with Esri Support for the color issue if you need to get this part working. Thanks!

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MattStayner
Occasional Contributor

OK. That feature isn't a big deal for me. I just tried it since it was already and there and wanted to make sure there wasn't some big change I should be aware of about switching from a scene to a map.

Thanks again!

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