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Snapping two polygons together in GIS

Georeferencing vector layer with control points using QGIS?How can I merge overlapping nodes of a polygon in QGIS?snapping polygons and linesHow to correct topology on a shared boundary by removing nodes from a feature?What am I doing wrong with QGIS v.clean?How to avoid field duplication when joining two vector layers?Problems with intersecting two polygons layers in QGISIntersect polygonsFixes to achieve topology in QGis not workingclipping layer using query builder in QGISHow to automate topology check/fix in QGIS?PostGIS Union of two polygons layers

6

5

I have been digitising a historical map which contains large areas called townlands, filled by smaller areas called fields. I digitised both as two separate vector layers, both polygons.

When digitised the field layers I snapped them to the townland boundaries where the townlands and fields shared a boundary. Unfortunately, I managed to shift the field layer by accident so now the fields and the townlands don’t overlap. Is there a topological function to fix this? To snap one layer of polygons back to another?

I tried v.clean in the GRASS module but this only appears to work for cleaning within one layer.

qgis topology snapping

share|improve this question

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In FME, there is a transformer called Snapper which would make your polygons snap.
  
  – U2ros
  Sep 6 '12 at 10:57
  

  
  
  
  

add a comment | 

6

5

I have been digitising a historical map which contains large areas called townlands, filled by smaller areas called fields. I digitised both as two separate vector layers, both polygons.

When digitised the field layers I snapped them to the townland boundaries where the townlands and fields shared a boundary. Unfortunately, I managed to shift the field layer by accident so now the fields and the townlands don’t overlap. Is there a topological function to fix this? To snap one layer of polygons back to another?

I tried v.clean in the GRASS module but this only appears to work for cleaning within one layer.

qgis topology snapping

share|improve this question

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  In FME, there is a transformer called Snapper which would make your polygons snap.
  
  – U2ros
  Sep 6 '12 at 10:57
  

  
  
  
  

add a comment | 

I have been digitising a historical map which contains large areas called townlands, filled by smaller areas called fields. I digitised both as two separate vector layers, both polygons.

When digitised the field layers I snapped them to the townland boundaries where the townlands and fields shared a boundary. Unfortunately, I managed to shift the field layer by accident so now the fields and the townlands don’t overlap. Is there a topological function to fix this? To snap one layer of polygons back to another?

I tried v.clean in the GRASS module but this only appears to work for cleaning within one layer.

qgis topology snapping

share|improve this question

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

share|improve this question

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

share|improve this question

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

edited 11 mins ago

Taras

2,2792727

edited 11 mins ago

Taras

2,2792727

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

asked Sep 6 '12 at 10:37

crichard75crichard75

9624

2 Answers
2

active

oldest

votes

2

If you have access to ArcGIS 10 you could try the Integrate (Data Management) tool:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002s000000

share|improve this answer

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Don't suppose you know the equivalent of this operation in QGIS/Grass?
  
  – geotheory
  Aug 12 '14 at 12:53
  

  
  
  
  

add a comment | 

2

I know you are looking for a solution with qgis: there is a plugin for qgis "affin transformation", where you can enter the following values: Scale, rotation, translation both for x and y

But here I recommend to give the free openjump a try: use werkzeuge (in English: tools) -transformiere (transform) transformieren... (transform ..) you can now draw easliy as many "shifting-vectors" you need on your map-canavas to to do the required transformation/warping

share|improve this answer

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the openjump tool looks good (not tried it--will involve installing yet another GIS tool :-)), but again not as easy as ShapeWarp. In SW, one could just click source and destination points, and it would gather the points and compute the trasnformation (just as in ERDAS). Any thoughts?
  
  – Sharad
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  there is a qgis plugin vector-bender - I did not try it myself - but it looks promising, you should give it a try, if you dont want to install openjump
  
  – Kurt
  yesterday
  

  
  
  
  

add a comment | 

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2

If you have access to ArcGIS 10 you could try the Integrate (Data Management) tool:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002s000000

share|improve this answer

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Don't suppose you know the equivalent of this operation in QGIS/Grass?
  
  – geotheory
  Aug 12 '14 at 12:53
  

  
  
  
  

add a comment | 

2

If you have access to ArcGIS 10 you could try the Integrate (Data Management) tool:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002s000000

share|improve this answer

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Don't suppose you know the equivalent of this operation in QGIS/Grass?
  
  – geotheory
  Aug 12 '14 at 12:53
  

  
  
  
  

add a comment | 

If you have access to ArcGIS 10 you could try the Integrate (Data Management) tool:

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002s000000

share|improve this answer

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

share|improve this answer

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

answered Sep 6 '12 at 12:09

RaynerRayner

3,21811629

2

I know you are looking for a solution with qgis: there is a plugin for qgis "affin transformation", where you can enter the following values: Scale, rotation, translation both for x and y

But here I recommend to give the free openjump a try: use werkzeuge (in English: tools) -transformiere (transform) transformieren... (transform ..) you can now draw easliy as many "shifting-vectors" you need on your map-canavas to to do the required transformation/warping

share|improve this answer

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the openjump tool looks good (not tried it--will involve installing yet another GIS tool :-)), but again not as easy as ShapeWarp. In SW, one could just click source and destination points, and it would gather the points and compute the trasnformation (just as in ERDAS). Any thoughts?
  
  – Sharad
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  there is a qgis plugin vector-bender - I did not try it myself - but it looks promising, you should give it a try, if you dont want to install openjump
  
  – Kurt
  yesterday
  

  
  
  
  

add a comment | 

2

I know you are looking for a solution with qgis: there is a plugin for qgis "affin transformation", where you can enter the following values: Scale, rotation, translation both for x and y

But here I recommend to give the free openjump a try: use werkzeuge (in English: tools) -transformiere (transform) transformieren... (transform ..) you can now draw easliy as many "shifting-vectors" you need on your map-canavas to to do the required transformation/warping

share|improve this answer

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the openjump tool looks good (not tried it--will involve installing yet another GIS tool :-)), but again not as easy as ShapeWarp. In SW, one could just click source and destination points, and it would gather the points and compute the trasnformation (just as in ERDAS). Any thoughts?
  
  – Sharad
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  there is a qgis plugin vector-bender - I did not try it myself - but it looks promising, you should give it a try, if you dont want to install openjump
  
  – Kurt
  yesterday
  

  
  
  
  

add a comment | 

I know you are looking for a solution with qgis: there is a plugin for qgis "affin transformation", where you can enter the following values: Scale, rotation, translation both for x and y

But here I recommend to give the free openjump a try: use werkzeuge (in English: tools) -transformiere (transform) transformieren... (transform ..) you can now draw easliy as many "shifting-vectors" you need on your map-canavas to to do the required transformation/warping

share|improve this answer

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

share|improve this answer

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339

answered Sep 6 '12 at 13:00

KurtKurt

4,94412339