feat: give credit to elevation provider

src/PlanView/PlanView.qml

@@ -730,6 +730,19 @@ Item {
             }
         }
 
+        QGCLabel {
+            // Elevation provider notice on top of terrain plot
+            readonly property string _licenseString: QGroundControl.elevationProviderNotice
+
+            id:                         licenseLabel
+            visible:                    terrainStatus.visible && _licenseString !== ""
+            anchors.bottom:             terrainStatus.top
+            anchors.horizontalCenter:   terrainStatus.horizontalCenter
+            anchors.bottomMargin:       ScreenTools.defaultFontPixelWidth * 0.5
+            font.pointSize:             ScreenTools.smallFontPointSize
+            text:                       qsTr("Powered by %1").arg(_licenseString)
+        }
+
         TerrainStatus {
             id:                 terrainStatus
             anchors.margins:    _toolsMargin

src/PlanView/TerrainStatus.qml

@@ -50,7 +50,6 @@ Rectangle {
 
     QGCFlickable {
         id:                 terrainProfileFlickable
-        //anchors.margins:    _margins
         anchors.top:        parent.top
         anchors.bottom:     parent.bottom
         anchors.leftMargin: titleLabel.contentHeight

src/QmlControls/QGroundControlQmlGlobal.h

@@ -109,6 +109,8 @@ public:
     //-------------------------------------------------------------------------
     // Elevation Provider
     Q_PROPERTY(QString  elevationProviderName           READ elevationProviderName              CONSTANT)
+    Q_PROPERTY(QString  elevationProviderNotice         READ elevationProviderNotice            CONSTANT)
+
 
 #if defined(QGC_ENABLE_PAIRING)
     Q_PROPERTY(PairingManager*      pairingManager          READ pairingManager         CONSTANT)
@@ -208,6 +210,7 @@ public:
 #endif
 
     QString elevationProviderName   () { return UrlFactory::kCopernicusElevationProviderKey; }
+    QString elevationProviderNotice () { return UrlFactory::kCopernicusElevationProviderNotice; }
 
     bool    singleFirmwareSupport   ();
     bool    singleVehicleSupport    ();

src/QtLocationPlugin/QGCMapUrlEngine.cpp

@@ -33,6 +33,7 @@ QGC_LOGGING_CATEGORY(QGCMapUrlEngineLog, "QGCMapUrlEngineLog")
 #include <QTimer>
 
 const char* UrlFactory::kCopernicusElevationProviderKey = "Copernicus Elevation";
+const char* UrlFactory::kCopernicusElevationProviderNotice = "© Airbus Defence and Space GmbH";
 
 //-----------------------------------------------------------------------------
 UrlFactory::UrlFactory() : _timeout(5 * 1000) {

src/QtLocationPlugin/QGCMapUrlEngine.h

@@ -30,6 +30,7 @@ class UrlFactory : public QObject {
     Q_OBJECT
 public:
     static const char* kCopernicusElevationProviderKey;
+    static const char* kCopernicusElevationProviderNotice;
 
     UrlFactory      ();
     ~UrlFactory     ();