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

2023-12-05 Thread noshin prachi via QGIS-User 
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
#!/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[ ]:




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Re: [Qgis-user] QGIS attribute forms question

2023-12-05 Thread Aguilar Bolivar, Rosa (UT-ITC) via QGIS-User 
Hi,
If I understood correctly,  You want to reuse a form given that a layer has 
more columns.
If you are using QGIS GUI you  can:
Option A. Change the data source to the layer. The form will remain. Add/edit 
the new attributes
Option B. Add the new layer and copy styles (form)  --> paste the style/form to 
the new layer

Hope this helps.

Rosa
-
Dr. Rosa Aguilar
University of Twente
Faculty of Geoinformation Science and Earth Observation
Connect with me on 
LinkedIn
https://rosaguilar.github.io
-
The essential is invisible to the eye. Saint-Exupéry

From: QGIS-User  On Behalf Of Brent Wood via 
QGIS-User
Sent: Tuesday, December 5, 2023 4:35 AM
To: 'Qgis-user@lists.osgeo.org' 
Subject: [Qgis-user] QGIS attribute forms question

Hi,

I have created some forms for data entry/edit using QGIS.

I have successfully exported them & imported them to apply in different 
computers with QGIS.

It can take several hours to create such a form where there are 80+ columns in 
the underlying database table,

I now have the situation where the underlying table needs columns added or 
removed.

QGIS will not apply a saved form to a layer unless the structure is identical.


How can I reuse a form for a layer representing a database table with (say) a 
single new column, by adding the new column to the form, rather than manually 
creating the whole form from scratch?


Thanks

Brent Wood

Principal Technician, Fisheries
NIWA
DDI:  +64 (4) 3860529
[https://www.niwa.co.nz/static/niwa-2018-horizontal-180.png]
Brent Wood
Principal Technician - GIS and Spatial Data Management
Programme Leader - Environmental Information Delivery
+64-4-386-0529

National Institute of Water & Atmospheric Research Ltd (NIWA)
301 Evans Bay Parade Hataitai Wellington New Zealand
Connect with NIWA: niwa.co.nz 
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[Qgis-user] Accessing iface from jupyter

2023-12-05 Thread noshin prachi via QGIS-User 
Dear all,
I am trying to create a map from qgis using jupyter. I have few layers that
need to be added to the map. I have tried to add iface by importing iface
 from qgis.utils import iface, plugins . But I am getting the following
error.
[image: image.png]

Please help me in this regard.

Regards,
Noshin Saiyara
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