[Qgis-user] Accessing iface from jupyter to create map from QGIS

[noshin prachi]

Dear all,
I am trying to create a map from qgis. I have added a few layers and
created a layout in qgis. All I want is to create a script to get a map
from the layer on the layout that I have created in qgis. I have attached
the code. I am thinking of activating each layer at a time so that only the
activated layer will be on the layout and a map will get generated. While
trying to activate with iface.setactivelayer I am facing an error. So no
layer is added to the layout. I have added the code  and image of the
generated map.
[image: Day-1.png]

[image: image.png]

How to access the layer in qgis? how to deactivate the first layer and then
move to the next layer for the next map.

Regards,
Noshin
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#!/usr/bin/env python
# coding: utf-8

# In[61]:


import os
from datetime import datetime, timedelta
from qgis.core import (
    QgsGeometry,
    QgsMapSettings,
    QgsPrintLayout,
    QgsMapSettings,
    QgsMapRendererParallelJob,
    QgsLayoutItemLabel,
    QgsLayoutItemLegend,
    QgsLayoutItemMap,
    QgsLayoutItemPolygon,
    QgsLayoutItemScaleBar,
    QgsLayoutExporter,
    QgsLayoutItem,
    QgsLayoutPoint,
    QgsLayoutSize,
    QgsUnitTypes,
    QgsProject,
    QgsFillSymbol,
    QgsAbstractValidityCheck,
    check,
)

from qgis.PyQt.QtGui import (
    QPolygonF,
    QColor,
)

from qgis.PyQt.QtCore import (
    QPointF,
    QRectF,
    QSize,
)


# In[70]:


project_path = r"C:\Users\FFWS\Desktop\Boundary_Generation_For_2D\2D Overland Flow Model-Boundary Generation\2D Overland Flow Model-Boundary Generation\bin\Debug\C2_FloodMap_SERM_V01.qgz"

project_instance = QgsProject.instance()

project_instance.read(project_path)
print(project_instance.fileName())


# In[71]:


map_layers = QgsProject.instance().mapLayersByName('V1054_SWRM_SW_2D PS_LR_Dike_Updt_statBaseFlood Map_Day01')[0]
iface.setActiveLayer(map_layers)


# In[64]:


projectInstance = QgsProject.instance()
layoutmanager = projectInstance.layoutManager()
layout = layoutmanager.layoutByName("SW_Day_1")


# In[65]:


map_label = QgsLayoutItemLabel(layout)


# In[67]:


firstDay ="2023-11-25 09:00:00"

dateTimeObj = datetime.strptime(firstDay, "%Y-%m-%d %I:%M:%S" )

secDay=(dateTimeObj+ timedelta(days = 1))

PreparedDayValue = secDay.strftime('%Y-%m-%d %I:%M:%S')
map_label.setText("Valid for: " +firstDay.strip('"')+ " "+"to" +" "+PreparedDayValue + ", Prepared on: " +  firstDay)



# In[68]:


layout.removeLayoutItem(map_label)
layout.addLayoutItem(map_label)


# In[69]:


map_label.attemptMove(QgsLayoutPoint(1.6, 0.5, QgsUnitTypes.LayoutInches))
exporter = QgsLayoutExporter(layout)
exporter.exportToImage(r"C:\Users\FFWS\Desktop\Boundary_Generation_For_2D\2D Overland Flow Model-Boundary Generation\2D Overland Flow Model-Boundary Generation\bin\Debug\Day-1.png", QgsLayoutExporter.ImageExportSettings() )


# In[ ]: