Building Mapping Applications with QGIS by Erik Westra

Author:Erik Westra [Westra, Erik]
Language: eng
Format: epub
Publisher: Packt Publishing
Published: 2014-12-30T08:00:00+00:00

Next, we want to fill our map canvas with the basemap and landmark map layers. To do this, we'll define a new method called loadMap(), and call this at the appropriate time. Add the following method to your MapExplorer class:

def loadMap(self): cur_dir = os.path.dirname(os.path.realpath(__file__)) filename = os.path.join(cur_dir, "data", "NE1_HR_LC_SR_W_DR", "NE1_HR_LC_SR_W_DR.tif") self.basemap_layer = QgsRasterLayer(filename, "basemap") QgsMapLayerRegistry.instance().addMapLayer( self.basemap_layer) filename = os.path.join(cur_dir, "data", "ne_10m_populated_places", "ne_10m_populated_places.shp") self.landmark_layer = QgsVectorLayer(filename, "landmarks", "ogr") QgsMapLayerRegistry.instance().addMapLayer( self.landmark_layer) self.showVisibleMapLayers() self.mapCanvas.setExtent(QgsRectangle(-127.7, 24.4, -79.3, 49.1))

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