[Qgis-user] How to define a region of interest mask in QGIS Processing Model

[Paolo Cavallini]

Il 08/06/2015 15:48, Hanssen, Frank ha scritto:
> Yes Bernd, you got it!
> 
>  
> 
> And hmm, that sounds cumbersome ..

Hi Frank,
if a rectangle is enough for you, you can use the extent as an input,
and the user can draw a rectangle on the map.
If you need a polygon, you have to draw it before running the model.
See the attached supersimple example.
All the best.

-- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html
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                        "values": {
                            "y": 207.0, 
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                    "param": {
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                            "hidden": false, 
                            "optional": false, 
                            "description": "rester"
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                        "class": "processing.core.parameters.ParameterRaster"
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                "class": "processing.modeler.ModelerAlgorithm.ModelerParameter"
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            "EXTENT_ESTENSIONE": {
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                            "name": "EXTENT_ESTENSIONE", 
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                            "value": null, 
                            "hidden": false, 
                            "description": "estensione"
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                        "class": "processing.core.parameters.ParameterExtent"
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                "class": "processing.modeler.ModelerAlgorithm.ModelerParameter"
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        "helpContent": {}, 
        "group": "test", 
        "name": "test", 
        "algs": {
            "GDALOGRCLIPRASTERBYEXTENT_1": {
                "values": {
                    "name": "GDALOGRCLIPRASTERBYEXTENT_1", 
                    "paramsFolded": true, 
                    "outputs": {
                        "OUTPUT": {
                            "values": {
                                "description": "clip", 
                                "pos": {
                                    "values": {
                                        "y": 359.0, 
                                        "x": 683.0
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                                    "class": "point"
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                            }, 
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                    "consoleName": "gdalogr:cliprasterbyextent", 
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