Python qgis.core.QgsWkbTypes.Point() Examples

def canvasPressEvent(self, event):
        """Capture the coordinate when the mouse button has been released."""
        pt = self.snappoint(event.originalPixelPoint())
        self.removeVertexMarker()
        if self.azDigitizerDialog is None:
            from .azDigitizer import AzDigitizerWidget
            self.azDigitizerDialog = AzDigitizerWidget(self.iface, self.iface.mainWindow())

        layer = self.iface.activeLayer()
        if layer is None or layer.wkbType() != QgsWkbTypes.Point:
            self.azDigitizerDialog.includeStartLabel.setEnabled(False)
            self.azDigitizerDialog.checkBox.setEnabled(False)
        else:
            self.azDigitizerDialog.includeStartLabel.setEnabled(True)
            self.azDigitizerDialog.checkBox.setEnabled(True)
        try:
            canvasCRS = self.canvas.mapSettings().destinationCrs()
            transform = QgsCoordinateTransform(canvasCRS, epsg4326, QgsProject.instance())
            pt4326 = transform.transform(pt.x(), pt.y())
            self.azDigitizerDialog.setPoint(pt4326)
            self.azDigitizerDialog.show()
        except Exception:
            self.iface.messageBar().pushMessage("", tr("Clicked location is invalid"), level=Qgis.Warning, duration=4) 

def processAlgorithm(self, parameters, context, feedback):
        source = self.parameterAsSource(parameters, self.PrmInputLayer, context)
        mgrsfieldname = self.parameterAsString(parameters, self.PrmMgrsField, context)
        if not mgrsfieldname:
            msg = 'Select an MGRS field to process'
            feedback.reportError(msg)
            raise QgsProcessingException(msg)
        epsg4326 = QgsCoordinateReferenceSystem("EPSG:4326")
        (sink, dest_id) = self.parameterAsSink(
            parameters, self.PrmOutputLayer,
            context, source.fields(), QgsWkbTypes.Point, epsg4326)

        featureCount = source.featureCount()
        total = 100.0 / featureCount if featureCount else 0
        badFeatures = 0

        iterator = source.getFeatures()
        for cnt, feature in enumerate(iterator):
            if feedback.isCanceled():
                break
            m = feature[mgrsfieldname]
            try:
                m = re.sub(r'\s+', '', str(m))  # Remove all white space
                lat, lon = mgrs.toWgs(m)
            except Exception:
                # traceback.print_exc()
                badFeatures += 1
                continue
            f = QgsFeature()
            f.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(lon, lat)))
            f.setAttributes(feature.attributes())
            sink.addFeature(f)
            if cnt % 100 == 0:
                feedback.setProgress(int(cnt * total))

        if badFeatures > 0:
            msg = "{} out of {} features contained MGRS coordinates".format(featureCount - badFeatures, featureCount)
            feedback.pushInfo(msg)

        return {self.PrmOutputLayer: dest_id} 

def __export_raster(self, outDir, field):
        xspacing = self.__xspacing()
        yspacing = self.__yspacing()

        with self.connect() as con:
            uri = QgsDataSourceUri()
            uri.setConnection(con.info.host, str(con.info.port), con.info.dbname, con.info.user, con.info.password)
            uri.setDataSource("_albion", "current_raster", "geom")
            uri.setParam("checkPrimaryKeyUnicity", "0")
            uri.setSrid("32632")
            uri.setWkbType(QgsWkbTypes.Point)
            v = QgsVectorLayer(uri.uri(), "current_raster", "postgres")
            res = processing.run("gdal:rasterize", {'INPUT':v,'FIELD':field,'BURN':0,'UNITS':1,'WIDTH':xspacing,'HEIGHT':yspacing,'EXTENT':v.extent(),'NODATA':-9999,'OPTIONS':'','DATA_TYPE':5,'INIT':None,'INVERT':False,'EXTRA':'','OUTPUT':os.path.join(outDir, 'dem.tif')})
            processing.run("qgis:slope", {'INPUT':res['OUTPUT'],'Z_FACTOR':1,'OUTPUT':os.path.join(outDir, 'slope.tif')})
            processing.run("qgis:aspect", {'INPUT':res['OUTPUT'],'Z_FACTOR':1,'OUTPUT':os.path.join(outDir, 'aspect.tif')})
            processing.run("qgis:ruggednessindex", {'INPUT':res['OUTPUT'],'Z_FACTOR':1,'OUTPUT':os.path.join(outDir, 'ruggednessindex.tif')}) 

def canvasReleaseEvent(self, event):
        # Make sure the point is transfored to 4326
        self.clearSelection()
        pt = self.toMapCoordinates(event.pos())
        canvasCRS = self.canvas.mapSettings().destinationCrs()
        transform = QgsCoordinateTransform(canvasCRS, self.epsg4326, QgsProject.instance())
        pt = transform.transform(pt.x(), pt.y())
        url = '{}?format=json&lat={:f}&lon={:f}&zoom={:d}&addressdetails=0&polygon_text=1'.format(self.settings.reverseURL(), pt.y(), pt.x(), self.settings.levelOfDetail)
        # print( url )
        jsondata = self.request(url)

        try:
            jd = json.loads(jsondata)
            try:
                display_name = jd['display_name']
                self.setText(display_name)
            except KeyError:
                self.setText("[Could not find address]")
            try:
                wkt = jd['geotext']
                geometry = QgsGeometry.fromWkt(wkt)
                if geometry.wkbType() == QgsWkbTypes.Point:
                    pt = geometry.asPoint()
                    lon = pt.x()
                    lat = pt.y()
                    self.addMarker(lat, lon)
                else:
                    geometry = self.transform_geom(geometry)
                    self.rubber.addGeometry(geometry, None)
                    self.rubber.show()
            except KeyError:
                try:
                    lon = float(jd['lon'])
                    lat = float(jd['lat'])
                    self.addMarker(lat, lon)
                except:
                    pass
        except Exception:
            self.setText("Error: "+jsondata)


        if not self.reverseGeoCodeDialog.isVisible():
            self.show() 

def accept(self):
        try:
            distance = float(self.distLineEdit.text())
            azimuth = float(self.azimuthLineEdit.text())
            units = self.unitsComboBox.currentIndex()  # 0 km, 1 m, 2 nm, 3 miles, 4 yards, 5 ft, 6 inches, 7 cm
            start = self.checkBox.isChecked()
        except Exception:
            self.iface.messageBar().pushMessage("", tr("Either distance or azimuth were invalid"), level=Qgis.Warning, duration=4)
            return
        layer = self.iface.activeLayer()
        if layer is None:
            self.iface.messageBar().pushMessage("", tr("No point or line layer selected"), level=Qgis.Warning, duration=4)
            return

        measureFactor = conversionToMeters(units)

        distance = distance * measureFactor
        pt = self.pt
        destCRS = layer.crs()
        transform = QgsCoordinateTransform(epsg4326, destCRS, QgsProject.instance())
        if layer.wkbType() == QgsWkbTypes.Point:
            g = geod.Direct(pt.y(), pt.x(), azimuth, distance, Geodesic.LATITUDE | Geodesic.LONGITUDE)
            if start:
                ptStart = transform.transform(self.pt.x(), self.pt.y())
                feat = QgsFeature(layer.fields())
                feat.setGeometry(QgsGeometry.fromPointXY(ptStart))
                layer.addFeature(feat)
            pt = transform.transform(g['lon2'], g['lat2'])
            feat = QgsFeature(layer.fields())
            feat.setGeometry(QgsGeometry.fromPointXY(pt))
            layer.addFeature(feat)
        else:  # It will either be a LineString or MultiLineString
            maxseglen = settings.maxSegLength * 1000.0  # Needs to be in meters
            maxSegments = settings.maxSegments
            gline = geod.Line(pt.y(), pt.x(), azimuth)
            n = int(math.ceil(distance / maxseglen))
            if n > maxSegments:
                n = maxSegments
            seglen = distance / n
            pts = []
            for i in range(0, n + 1):
                s = seglen * i
                g = gline.Position(s, Geodesic.LATITUDE | Geodesic.LONGITUDE | Geodesic.LONG_UNROLL)
                ptc = transform.transform(g['lon2'], g['lat2'])
                pts.append(ptc)
            feat = QgsFeature(layer.fields())
            if layer.wkbType() == QgsWkbTypes.LineString:
                feat.setGeometry(QgsGeometry.fromPolylineXY(pts))
            else:
                feat.setGeometry(QgsGeometry.fromMultiPolylineXY([pts]))
            layer.addFeatures([feat])

        layer.updateExtents()
        self.iface.mapCanvas().refresh()
        self.close()