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QgsSingleBandPseudoColorRenderer not automatically applied after added
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Rasterize after buffer in loopConnectors do not appear automatically in easy custom labellingHow can QGIS 3 Data Source Manager automatically close after load a layer?next method for FeatureIterator object in QGIS 3 seemingly not working?Why a QgsExpression does not evaluate a feature as expected in PyQGIS 3?Grouping layers using PyQGIS makes them not visible on canvas?Layers do not align after projection using QGIS?QGIS Processing Script Stops Working After First RunHow can I programmatically style layer after output is returned from QGIS 3 processing script?Algorithm addgeometryattributes not found
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Summary
I am trying to apply a Single Band Pseudo Color Renderer (SBPCR) to a raster layer, importing the shader from an XML. I've hit a dead end trying to get my SBPCR to apply.
- QGIS Version - 3.4.5
- Mac OS X v10.14.4
- Python 3.6
Problem
Unlike my hillshade raster which, upon being added to the renderer seems to refresh automatically, this does not happen with my SBPCR renderer.
Code Example
def add_color_gradient_raster(color_gradient_rlayer):
# Import Color Ramp
my_qfile = QFile("/Hydro1/top_15lev.xml.xml")
my_qdom = QDomDocument()
my_qdom.setContent(my_qfile, False)
my_raster_shader = QgsRasterShader()
my_raster_shader.readXml(my_qdom.documentElement())
# Single Band Pseudo Color Render Created
sb_pseudo_color_renderer = QgsSingleBandPseudoColorRenderer(
color_gradient_rlayer.dataProvider(),
1,
my_raster_shader)
sb_pseudo_color_renderer.setOpacity(0.6)
color_gradient_rlayer.setRenderer(sb_pseudo_color_renderer)
# Add layer into project
QgsProject.instance().addMapLayer(color_gradient_rlayer, False)
layerTree = iface.layerTreeCanvasBridge().rootGroup()
layerTree.insertChildNode(3, QgsLayerTreeLayer(color_gradient_rlayer))
Output
As seen above I have reason to believe that the problem is not in the creation of the renderer.
The layer is successfully created and the renderer's opacity is set.
Upon editing the layer's properties all options seem to be set
correctly (including the imported colours) and I only need to hit
apply/ok.
How do I "apply" these settings?
I am not sure what I am missing.
qgis-3 pyqgis-3
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Summary
I am trying to apply a Single Band Pseudo Color Renderer (SBPCR) to a raster layer, importing the shader from an XML. I've hit a dead end trying to get my SBPCR to apply.
- QGIS Version - 3.4.5
- Mac OS X v10.14.4
- Python 3.6
Problem
Unlike my hillshade raster which, upon being added to the renderer seems to refresh automatically, this does not happen with my SBPCR renderer.
Code Example
def add_color_gradient_raster(color_gradient_rlayer):
# Import Color Ramp
my_qfile = QFile("/Hydro1/top_15lev.xml.xml")
my_qdom = QDomDocument()
my_qdom.setContent(my_qfile, False)
my_raster_shader = QgsRasterShader()
my_raster_shader.readXml(my_qdom.documentElement())
# Single Band Pseudo Color Render Created
sb_pseudo_color_renderer = QgsSingleBandPseudoColorRenderer(
color_gradient_rlayer.dataProvider(),
1,
my_raster_shader)
sb_pseudo_color_renderer.setOpacity(0.6)
color_gradient_rlayer.setRenderer(sb_pseudo_color_renderer)
# Add layer into project
QgsProject.instance().addMapLayer(color_gradient_rlayer, False)
layerTree = iface.layerTreeCanvasBridge().rootGroup()
layerTree.insertChildNode(3, QgsLayerTreeLayer(color_gradient_rlayer))
Output
As seen above I have reason to believe that the problem is not in the creation of the renderer.
The layer is successfully created and the renderer's opacity is set.
Upon editing the layer's properties all options seem to be set
correctly (including the imported colours) and I only need to hit
apply/ok.
How do I "apply" these settings?
I am not sure what I am missing.
qgis-3 pyqgis-3
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Summary
I am trying to apply a Single Band Pseudo Color Renderer (SBPCR) to a raster layer, importing the shader from an XML. I've hit a dead end trying to get my SBPCR to apply.
- QGIS Version - 3.4.5
- Mac OS X v10.14.4
- Python 3.6
Problem
Unlike my hillshade raster which, upon being added to the renderer seems to refresh automatically, this does not happen with my SBPCR renderer.
Code Example
def add_color_gradient_raster(color_gradient_rlayer):
# Import Color Ramp
my_qfile = QFile("/Hydro1/top_15lev.xml.xml")
my_qdom = QDomDocument()
my_qdom.setContent(my_qfile, False)
my_raster_shader = QgsRasterShader()
my_raster_shader.readXml(my_qdom.documentElement())
# Single Band Pseudo Color Render Created
sb_pseudo_color_renderer = QgsSingleBandPseudoColorRenderer(
color_gradient_rlayer.dataProvider(),
1,
my_raster_shader)
sb_pseudo_color_renderer.setOpacity(0.6)
color_gradient_rlayer.setRenderer(sb_pseudo_color_renderer)
# Add layer into project
QgsProject.instance().addMapLayer(color_gradient_rlayer, False)
layerTree = iface.layerTreeCanvasBridge().rootGroup()
layerTree.insertChildNode(3, QgsLayerTreeLayer(color_gradient_rlayer))
Output
As seen above I have reason to believe that the problem is not in the creation of the renderer.
The layer is successfully created and the renderer's opacity is set.
Upon editing the layer's properties all options seem to be set
correctly (including the imported colours) and I only need to hit
apply/ok.
How do I "apply" these settings?
I am not sure what I am missing.
qgis-3 pyqgis-3
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Summary
I am trying to apply a Single Band Pseudo Color Renderer (SBPCR) to a raster layer, importing the shader from an XML. I've hit a dead end trying to get my SBPCR to apply.
- QGIS Version - 3.4.5
- Mac OS X v10.14.4
- Python 3.6
Problem
Unlike my hillshade raster which, upon being added to the renderer seems to refresh automatically, this does not happen with my SBPCR renderer.
Code Example
def add_color_gradient_raster(color_gradient_rlayer):
# Import Color Ramp
my_qfile = QFile("/Hydro1/top_15lev.xml.xml")
my_qdom = QDomDocument()
my_qdom.setContent(my_qfile, False)
my_raster_shader = QgsRasterShader()
my_raster_shader.readXml(my_qdom.documentElement())
# Single Band Pseudo Color Render Created
sb_pseudo_color_renderer = QgsSingleBandPseudoColorRenderer(
color_gradient_rlayer.dataProvider(),
1,
my_raster_shader)
sb_pseudo_color_renderer.setOpacity(0.6)
color_gradient_rlayer.setRenderer(sb_pseudo_color_renderer)
# Add layer into project
QgsProject.instance().addMapLayer(color_gradient_rlayer, False)
layerTree = iface.layerTreeCanvasBridge().rootGroup()
layerTree.insertChildNode(3, QgsLayerTreeLayer(color_gradient_rlayer))
Output
As seen above I have reason to believe that the problem is not in the creation of the renderer.
The layer is successfully created and the renderer's opacity is set.
Upon editing the layer's properties all options seem to be set
correctly (including the imported colours) and I only need to hit
apply/ok.
How do I "apply" these settings?
I am not sure what I am missing.
qgis-3 pyqgis-3
qgis-3 pyqgis-3
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
edited Apr 7 at 22:04
PolyGeo♦
53.9k1782246
53.9k1782246
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
asked Apr 7 at 21:41
Christiaan van der MerweChristiaan van der Merwe
61
61
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Christiaan van der Merwe is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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