How can I save a vector layer to memory (or is there a reason QGIS doesn't allow this)? The...
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How can I save a vector layer to memory (or is there a reason QGIS doesn't allow this)?
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It's impressive how many different vector file formats QGIS (using ver 3.6.0) allows me to save a layer as:
But as far as I can tell, QGIS doesn't allow me to save a vector layer to memory. In my normal workflow in manipulating vector layers, I find myself having to save several intermediate vector layers to file, clogging up my file system or databsase with something like "vector_layer", "vector_layer1", "vector_layer2", "vector_layer2a", etc. It is often trivial to perform the updates/edits to the layer, and because I really don't care about these intermediate files, I'd rather be able to just save them in memory within the QGIS environment. Saving to memory would allow me to simply remove the layers from the project when I finish my workflow instead of having to delete from my Postgres database or my desktop.
When performing a geoprocessing task, there is the option to save to memory, but why can't I have the option to export a layer to memory on its own?
qgis vector qgis-3 save memory-layer
asked yesterday
Tyler NTyler N
6318
add a comment |
It's impressive how many different vector file formats QGIS (using ver 3.6.0) allows me to save a layer as:
But as far as I can tell, QGIS doesn't allow me to save a vector layer to memory. In my normal workflow in manipulating vector layers, I find myself having to save several intermediate vector layers to file, clogging up my file system or databsase with something like "vector_layer", "vector_layer1", "vector_layer2", "vector_layer2a", etc. It is often trivial to perform the updates/edits to the layer, and because I really don't care about these intermediate files, I'd rather be able to just save them in memory within the QGIS environment. Saving to memory would allow me to simply remove the layers from the project when I finish my workflow instead of having to delete from my Postgres database or my desktop.
When performing a geoprocessing task, there is the option to save to memory, but why can't I have the option to export a layer to memory on its own?
qgis vector qgis-3 save memory-layer
asked yesterday
Tyler NTyler N
6318
I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday
add a comment |
It's impressive how many different vector file formats QGIS (using ver 3.6.0) allows me to save a layer as:
But as far as I can tell, QGIS doesn't allow me to save a vector layer to memory. In my normal workflow in manipulating vector layers, I find myself having to save several intermediate vector layers to file, clogging up my file system or databsase with something like "vector_layer", "vector_layer1", "vector_layer2", "vector_layer2a", etc. It is often trivial to perform the updates/edits to the layer, and because I really don't care about these intermediate files, I'd rather be able to just save them in memory within the QGIS environment. Saving to memory would allow me to simply remove the layers from the project when I finish my workflow instead of having to delete from my Postgres database or my desktop.
When performing a geoprocessing task, there is the option to save to memory, but why can't I have the option to export a layer to memory on its own?
qgis vector qgis-3 save memory-layer
asked yesterday
Tyler NTyler N
6318
It's impressive how many different vector file formats QGIS (using ver 3.6.0) allows me to save a layer as:
But as far as I can tell, QGIS doesn't allow me to save a vector layer to memory. In my normal workflow in manipulating vector layers, I find myself having to save several intermediate vector layers to file, clogging up my file system or databsase with something like "vector_layer", "vector_layer1", "vector_layer2", "vector_layer2a", etc. It is often trivial to perform the updates/edits to the layer, and because I really don't care about these intermediate files, I'd rather be able to just save them in memory within the QGIS environment. Saving to memory would allow me to simply remove the layers from the project when I finish my workflow instead of having to delete from my Postgres database or my desktop.
When performing a geoprocessing task, there is the option to save to memory, but why can't I have the option to export a layer to memory on its own?
qgis vector qgis-3 save memory-layer
qgis vector qgis-3 save memory-layer
asked yesterday
Tyler NTyler N
6318
asked yesterday
Tyler NTyler N
6318
asked yesterday
Tyler NTyler N
6318
asked yesterday
Tyler NTyler N
6318
asked yesterday
Tyler NTyler N
6318
6318
I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday
add a comment |
I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday
I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday
add a comment |
2 Answers
2
active
oldest
votes
Try outputting a specific format to memory using the special "/vsimem" virtual filesystem.
For example:
answered yesterday
user2856user2856
31k258106
add a comment |
As a workaround, you can copy a layer to memory by running a processing tool in a way that generates an identical layer, and output the tool to [Create temporary layer].
For example, use the default $geometry expression in the Geometry by expression tool:
Other options include:
- for polygon layers, Buffer tool with buffer distance of 0
- Translate tool with all offset distances 0
- Reproject Layer tool with Target CRS the same as the layer's current CRS
etc.
answered yesterday
cskcsk
9,7781035
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try outputting a specific format to memory using the special "/vsimem" virtual filesystem.
For example:
answered yesterday
user2856user2856
31k258106
add a comment |
Try outputting a specific format to memory using the special "/vsimem" virtual filesystem.
For example:
answered yesterday
user2856user2856
31k258106
add a comment |
Try outputting a specific format to memory using the special "/vsimem" virtual filesystem.
For example:
answered yesterday
user2856user2856
31k258106
Try outputting a specific format to memory using the special "/vsimem" virtual filesystem.
For example:
answered yesterday
user2856user2856
31k258106
answered yesterday
user2856user2856
31k258106
answered yesterday
user2856user2856
31k258106
answered yesterday
user2856user2856
31k258106
31k258106
add a comment |
add a comment |
As a workaround, you can copy a layer to memory by running a processing tool in a way that generates an identical layer, and output the tool to [Create temporary layer].
For example, use the default $geometry expression in the Geometry by expression tool:
Other options include:
- for polygon layers, Buffer tool with buffer distance of 0
- Translate tool with all offset distances 0
- Reproject Layer tool with Target CRS the same as the layer's current CRS
etc.
answered yesterday
cskcsk
9,7781035
add a comment |
As a workaround, you can copy a layer to memory by running a processing tool in a way that generates an identical layer, and output the tool to [Create temporary layer].
For example, use the default $geometry expression in the Geometry by expression tool:
Other options include:
- for polygon layers, Buffer tool with buffer distance of 0
- Translate tool with all offset distances 0
- Reproject Layer tool with Target CRS the same as the layer's current CRS
etc.
answered yesterday
cskcsk
9,7781035
add a comment |
As a workaround, you can copy a layer to memory by running a processing tool in a way that generates an identical layer, and output the tool to [Create temporary layer].
For example, use the default $geometry expression in the Geometry by expression tool:
Other options include:
- for polygon layers, Buffer tool with buffer distance of 0
- Translate tool with all offset distances 0
- Reproject Layer tool with Target CRS the same as the layer's current CRS
etc.
answered yesterday
cskcsk
9,7781035
As a workaround, you can copy a layer to memory by running a processing tool in a way that generates an identical layer, and output the tool to [Create temporary layer].
For example, use the default $geometry expression in the Geometry by expression tool:
Other options include:
- for polygon layers, Buffer tool with buffer distance of 0
- Translate tool with all offset distances 0
- Reproject Layer tool with Target CRS the same as the layer's current CRS
etc.
answered yesterday
cskcsk
9,7781035
answered yesterday
cskcsk
9,7781035
answered yesterday
cskcsk
9,7781035
answered yesterday
cskcsk
9,7781035
9,7781035
add a comment |
add a comment |
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I don't get why you are not using those temporary/virtual (memory) layers produced by e.g. the geoprocessing tools; they are, effectively, 'saved to memory'? they are pretty much exactly what you refer to: in-memory (or stored in the QGIS temp directory, kept there until deleted after saving the project), reusable in other tools in the chain and easily disposed of (cluttering only your layer panel, but that can be grouped accordingly)...or am I not getting your question? 'save to memory' is somewhat of a paradox...
– ThingumaBob
yesterday
You can request a feature: issues.qgis.org.
– csk
yesterday