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iI am trying to create a circular raster in Qgis3.8.3-Zanzibar with the Python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore, I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Processing algorithm…
Algorithm 'Polygonize' starting…
Input parameters:
{ 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' }
Processing lines…
Noding lines…
Polygonizing…
Saving polygons…
Execution completed in 0.98 seconds
Results:
{'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'}
Loading resulting layers
Algorithm 'Polygonize' finished

Ok it works....all all features are now polygon. But alle But all the attribute table values are gone.

How do I keep the attribute values? And why did the polygonize function give all the new polygon features random ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

i am trying to create a circular raster in Qgis3.8.3-Zanzibar with the Python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But alle the attribute table values are gone.

How do I keep the attribute values? And why did the polygonize function give all the new polygon features random ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

I am trying to create a circular raster in Qgis3.8.3-Zanzibar with the Python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore, I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm…
Algorithm 'Polygonize' starting…
Input parameters:
{ 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' }
Processing lines…
Noding lines…
Polygonizing…
Saving polygons…
Execution completed in 0.98 seconds
Results:
{'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'}
Loading resulting layers
Algorithm 'Polygonize' finished

Ok it works... all features are now polygon. But all the attribute table values are gone.

How do I keep the attribute values? And why did the polygonize function give all the new polygon features random ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

re-corrected naming

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edited Jan 24, 2020 at 11:44

Vince

20.3k
16
48
65

Polygonizing LineString Featuresfeatures to Polygon Featuresfeatures and keeping Attribute table values using PyQGIS

i am trying to create a circular raster in Qgis3.8.3-Zanzibar with the pythonPython console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But alle the attribute table values are gone.

How do I keep the attribute values.? And why did the polygonize function give all the new polygon features random id's.ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

Polygonizing LineString Features to Polygon Features and keeping Attribute table values using PyQGIS

i am trying to create a circular raster in Qgis3.8.3-Zanzibar with the python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But alle the attribute table values are gone.

How do I keep the attribute values. And why did the polygonize function give all the new polygon features random id's. It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

Polygonizing LineString features to Polygon features and keeping Attribute table values using PyQGIS

i am trying to create a circular raster in Qgis3.8.3-Zanzibar with the Python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But alle the attribute table values are gone.

How do I keep the attribute values? And why did the polygonize function give all the new polygon features random ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

edited body; edited tags; edited title; edited title

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edited Jan 24, 2020 at 11:40

PolyGeo ♦

65.4k
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QGIS3 How to polygonize Polygonizing LineString featuresFeatures to Polygon featuresFeatures and keep the attributekeeping Attribute table values using PyQGIS

i am trying to create a circular raster in QGIS 3Qgis3.8.3-Zanzibar with the Pythonpython console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But allalle the attribute table values are gone.

How do I keep the attribute values?. And why did the polygonize function give all the new polygon features random ids?id's. It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

QGIS3 How to polygonize LineString features to Polygon features and keep the attribute table values

i am trying to create a circular raster in QGIS 3.8.3-Zanzibar with the Python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But all the attribute table values are gone.

How do I keep the attribute values? And why did the polygonize function give all the new polygon features random ids? It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

Polygonizing LineString Features to Polygon Features and keeping Attribute table values using PyQGIS

i am trying to create a circular raster in Qgis3.8.3-Zanzibar with the python console. I am able to make it with LineStrings (combine of Polyline and Circular String) and fill each feature with attributes (see picture).

Now I want to make each feature to a polygon. Therefore I use the function polygonize (Processing Toolbox --> QGIS Geoalgorithms --> Polygonize). I check the "Keep table structure of layer" option and run the process:

Processing algorithm… Algorithm 'Polygonize' starting… Input parameters: { 'INPUT' : 'LineString?crs=epsg:25832&field=id:integer&field=name:string(20)&field=WINKEL:integer&field=METER:integer&field=KILOMETER:Double&field=AREA_METER:Double&index=yes&uid={feb5e364-45f5-4e97-aeee-7ab4cd65bbf3}', 'KEEP_FIELDS' : True, 'OUTPUT' : 'TEMPORARY_OUTPUT' } Processing lines… Noding lines… Polygonizing… Saving polygons… Execution completed in 0.98 seconds Results: {'OUTPUT': 'Polygons_from_lines_9dcc9791_d9e2_4399_b9ff_3bf1c61f6e1c'} Loading resulting layers Algorithm 'Polygonize' finished

Ok it works....all features are now polygon. But alle the attribute table values are gone.

How do I keep the attribute values. And why did the polygonize function give all the new polygon features random id's. It is impossible for me to give them new values because there are distributed random, not like before when I add the as LineStrings.

naming; English usage; removed helpme, closing, and redundant signature

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edited Jan 24, 2020 at 11:39

Vince

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asked Jan 24, 2020 at 10:50

Sebastian

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Polygonizing LineString Featuresfeatures to Polygon Featuresfeatures and keeping Attribute table values using PyQGIS

Polygonizing LineString Features to Polygon Features and keeping Attribute table values using PyQGIS

Polygonizing LineString features to Polygon features and keeping Attribute table values using PyQGIS

QGIS3 How to polygonize Polygonizing LineString featuresFeatures to Polygon featuresFeatures and keep the attributekeeping Attribute table values using PyQGIS

QGIS3 How to polygonize LineString features to Polygon features and keep the attribute table values

Polygonizing LineString Features to Polygon Features and keeping Attribute table values using PyQGIS