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TomazicM
TomazicM
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How to create Create polygons from raster with only a selected amount of features (not each pixel a different polygon)?

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). 

I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. 

However in a later step I want to assign an average point value to each polygon and in this way it is not working.

How to create polygons from raster with only a selected amount of features (not each pixel a different polygon)

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. However in a later step I want to assign an average point value to each polygon and in this way it is not working.

Create polygons from raster with only a selected amount of features (not each pixel a different polygon)?

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). 

I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. 

However in a later step I want to assign an average point value to each polygon and in this way it is not working.

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edit approved Nov 9, 2019 at 17:03
humperderp
edit approved Nov 9, 2019 at 17:03
humperderp
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I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. However in a later step I want to assign an average point value to each polygon and in this way it is not working. Is there anyone who could help with this problem?

Kind regards

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. However in a later step I want to assign an average point value to each polygon and in this way it is not working. Is there anyone who could help with this problem?

Kind regards

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. However in a later step I want to assign an average point value to each polygon and in this way it is not working.

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FredVt
FredVt
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How to create polygons from raster with only a selected amount of features (not each pixel a different polygon)

I am trying to convert a raster into different polygons. The raster is based on a DEM and only contains three classes (each pixel has value 1, 2 or 3, obtained by using the raster calculator). I want to create three polygons out of this (so just one shapefile with three features) but when I use the polygonize processing tool the result is a different ID for each pixel and as an attribute the value 1,2 or 3. However in a later step I want to assign an average point value to each polygon and in this way it is not working. Is there anyone who could help with this problem?

Kind regards