feat: added some missing scripts.
This commit is contained in:
Joaquin Gottlebe
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from qgis.core import *
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from PyQt5.QtGui import *
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from PyQt5.QtCore import *
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from PyQt5 import *
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from datetime import datetime
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import os
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QGIS_PREFIX_PATH = "/Applications/QGIS.app/Contents/Resources/python"
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LAYER_PATH = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/lab6/stacked/stacked.tif"
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STYLE_PATH = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/styles/true_color_2.qml"
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EXPORT_PATH = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/lab6/maps/true_color_water.png"
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NORTH_ARROW_PATH = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/styles/north_arrow.svg"
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SECOND_LAYER_PATH = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/lab6/kmeans/kmeans_5.tif"
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STYLE_PATH_SECOND = "/Users/huaqo/Developer/courses/2024_Remote_Sensing/styles/overlay_water.qml"
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map_pos_x = 20
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map_pos_y = 30
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map_size_x = 200
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map_size_y = 150
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grid_interval_x = 100000
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grid_interval_y = 100000
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LAYER_NAME = "True Color"
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SECOND_LAYER_NAME = "Water"
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legend_pos_x = 245
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legend_pos_y = 30
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scalebar_pos_x = 20
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scalebar_pos_y = 190
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north_arrow_pos_x = 30
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north_arrow_pos_y = 40
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north_arrow_size_x = 15
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north_arrow_size_y = 15
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title_text = "True Color Landsat and K-means Water class"
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title_fontsize = 16
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title_height = 10
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author_text = "Author: Joaquin Gottlebe"
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author_pos_y = 100
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date_text = f"Date: {datetime.now().strftime('%d.%m.%Y')}"
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date_pos_y = 110
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crs_text = "CRS: EPSG 32633"
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crs_pos_y = 120
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fontfamily = "Arial"
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info_font_size = 12
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info_pos_x = legend_pos_x
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# Initialize QGIS Application
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QgsApplication.setPrefixPath(QGIS_PREFIX_PATH, True)
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qgs = QgsApplication([], False)
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qgs.initQgis()
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# Cleanup
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project = QgsProject.instance()
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layer_ids = list(project.mapLayers().keys())
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for layer_id in layer_ids:
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project.removeMapLayer(layer_id)
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# Load Layer
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raster_layer = QgsRasterLayer(LAYER_PATH, LAYER_NAME)
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if not raster_layer.isValid():
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raise Exception(f"{LAYER_NAME} layer failed to load!")
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second_raster_layer = QgsRasterLayer(SECOND_LAYER_PATH, SECOND_LAYER_NAME)
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if not second_raster_layer.isValid():
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raise Exception(f"{SECOND_LAYER_NAME} layer failed to load!")
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QgsProject.instance().addMapLayer(raster_layer)
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if not raster_layer.loadNamedStyle(STYLE_PATH):
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raise Exception(f"Style {STYLE_PATH} failed to load")
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QgsProject.instance().addMapLayer(second_raster_layer)
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if not second_raster_layer.loadNamedStyle(STYLE_PATH_SECOND):
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raise Exception(f"Style {STYLE_PATH_SECOND} failed to load")
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# Create Layout
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layout = QgsPrintLayout(project)
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layout.initializeDefaults()
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# Map
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map_item = QgsLayoutItemMap(layout)
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map_item.attemptMove(QgsLayoutPoint(map_pos_x,map_pos_y, QgsUnitTypes.LayoutMillimeters))
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map_item.attemptResize(QgsLayoutSize(map_size_x, map_size_y, QgsUnitTypes.LayoutMillimeters))
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map_item.zoomToExtent(raster_layer.extent())
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layout.addLayoutItem(map_item)
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# Add Coordinate Grid
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grid = map_item.grid()
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grid.setEnabled(True)
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grid.setIntervalX(grid_interval_x)
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grid.setIntervalY(grid_interval_y)
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grid.setAnnotationEnabled(True)
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grid.setAnnotationPrecision(0)
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grid.setFrameStyle(QgsLayoutItemMapGrid.Zebra)
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# Label
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title_label = QgsLayoutItemLabel(layout)
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title_label.setText(title_text)
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title_label.setFont(QFont(fontfamily, title_fontsize))
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title_label.setHAlign(Qt.AlignCenter)
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title_label.adjustSizeToText()
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layout_width = layout.pageCollection().page(0).pageSize().width()
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title_width = title_label.rectWithFrame().width()
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center_x = (layout_width - title_width) / 2
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title_label.attemptMove(QgsLayoutPoint(center_x, title_height, QgsUnitTypes.LayoutMillimeters))
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layout.addLayoutItem(title_label)
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# Legend
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legend_item = QgsLayoutItemLegend(layout)
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legend_item.setLinkedMap(map_item)
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legend_item.setTitle("Legend")
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legend_item.setFrameEnabled(True)
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legend_item.attemptMove(QgsLayoutPoint(legend_pos_x,legend_pos_y, QgsUnitTypes.LayoutMillimeters))
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layout.addLayoutItem(legend_item)
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# Scalebar
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scalebar_item = QgsLayoutItemScaleBar(layout)
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scalebar_item.setStyle('Single Box')
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scalebar_item.setLinkedMap(map_item)
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scalebar_item.setUnitLabel('m')
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scalebar_item.setNumberOfSegments(4)
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scalebar_item.setNumberOfSegmentsLeft(0)
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scalebar_item.setUnitsPerSegment(50000)
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scalebar_item.applyDefaultSize()
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scalebar_item.attemptMove(QgsLayoutPoint(scalebar_pos_x,scalebar_pos_y, QgsUnitTypes.LayoutMillimeters))
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layout.addLayoutItem(scalebar_item)
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# North Arrow
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north_arrow_item = QgsLayoutItemPicture(layout)
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north_arrow_item.setPicturePath(NORTH_ARROW_PATH)
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if not north_arrow_item.picturePath():
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print("North arrow image failed to load!")
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north_arrow_item.setReferencePoint(QgsLayoutItemPicture.UpperLeft)
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north_arrow_item.attemptMove(QgsLayoutPoint(north_arrow_pos_x,north_arrow_pos_y,QgsUnitTypes.LayoutMillimeters))
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north_arrow_item.attemptResize(QgsLayoutSize(north_arrow_size_x,north_arrow_size_y,QgsUnitTypes.LayoutMillimeters))
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layout.addLayoutItem(north_arrow_item)
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# Author Info
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info_label = QgsLayoutItemLabel(layout)
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info_label.setText(author_text)
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info_label.setFont(QFont(fontfamily, info_font_size))
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info_label.setHAlign(Qt.AlignLeft)
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info_label.attemptMove(QgsLayoutPoint(info_pos_x, author_pos_y, QgsUnitTypes.LayoutMillimeters))
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info_label.adjustSizeToText()
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layout.addLayoutItem(info_label)
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# Date Info
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info_label = QgsLayoutItemLabel(layout)
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info_label.setText(date_text)
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info_label.setFont(QFont(fontfamily, info_font_size))
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info_label.setHAlign(Qt.AlignLeft)
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info_label.attemptMove(QgsLayoutPoint(info_pos_x, date_pos_y, QgsUnitTypes.LayoutMillimeters))
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info_label.adjustSizeToText()
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layout.addLayoutItem(info_label)
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# CRS Info
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info_label = QgsLayoutItemLabel(layout)
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info_label.setText(crs_text)
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info_label.setFont(QFont(fontfamily, info_font_size))
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info_label.setHAlign(Qt.AlignLeft)
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info_label.attemptMove(QgsLayoutPoint(info_pos_x, crs_pos_y, QgsUnitTypes.LayoutMillimeters))
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info_label.adjustSizeToText()
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layout.addLayoutItem(info_label)
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# Export Map
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exporter = QgsLayoutExporter(layout)
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if os.path.exists(EXPORT_PATH):
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os.remove(EXPORT_PATH)
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export_result = exporter.exportToImage(EXPORT_PATH, QgsLayoutExporter.ImageExportSettings())
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if export_result != QgsLayoutExporter.Success:
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print(f"Failed to export {LAYER_NAME} map!")
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else:
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print(f"Map exported to: {EXPORT_PATH}")
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# Cleanup QGIS
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qgs.exitQgis()
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