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Merging two neighboring cells in grid of type SpatialPolygonsDataFrame?
The Next CEO of Stack OverflowMerge Spatially Coincident Features in the Same Feature ClassFind which grid cells contain a pointCreating randomly shaped clumps of cells in a raster from seeds of 1 cell/pixel?A linestring merger algorithmMerging DEMs of different grid sizeCreating grid after merging shapefiles?Changing tracks to vectors in a gridRoadnetwork_mergingCreate a buffer around pointsAdding value of overlapping point features?
I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the picture.
I loop over all cells and see which one has to be merged, then I get its neighbors with gTouches, but I couldn't get it work with functions like gUnaryUnion and aggregate.
Here is my code:
for(ix in(1:length(mygridshp)))
if(mygridshp@polygons[[ix]]@area < 20000)
neighbor_cells <- gTouches(mygridspolygons[ix], my_other_cells, byid=TRUE);
neighbor_cells_ids <- my_other_cells$unit_id[neighbor_cells == TRUE];
if(length(neighbor_cells_ids) > 0)
first_neighbor <- mygridshp[mygridshp@data$unit_id==neighbor_cells_ids[1],];
new_cell <- aggregate(rbind(first_neighbor, mygridshp[ix,]));
new_cell <- gUnaryUnion(spgeom=union(first_neighbor,mygridshp[ix,]));
Any better idea how to do this?
r merge vector-grid
edited 2 days ago
Andre Silva
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the picture.
I loop over all cells and see which one has to be merged, then I get its neighbors with gTouches, but I couldn't get it work with functions like gUnaryUnion and aggregate.
Here is my code:
for(ix in(1:length(mygridshp)))
if(mygridshp@polygons[[ix]]@area < 20000)
neighbor_cells <- gTouches(mygridspolygons[ix], my_other_cells, byid=TRUE);
neighbor_cells_ids <- my_other_cells$unit_id[neighbor_cells == TRUE];
if(length(neighbor_cells_ids) > 0)
first_neighbor <- mygridshp[mygridshp@data$unit_id==neighbor_cells_ids[1],];
new_cell <- aggregate(rbind(first_neighbor, mygridshp[ix,]));
new_cell <- gUnaryUnion(spgeom=union(first_neighbor,mygridshp[ix,]));
Any better idea how to do this?
r merge vector-grid
edited 2 days ago
Andre Silva
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the picture.
I loop over all cells and see which one has to be merged, then I get its neighbors with gTouches, but I couldn't get it work with functions like gUnaryUnion and aggregate.
Here is my code:
for(ix in(1:length(mygridshp)))
if(mygridshp@polygons[[ix]]@area < 20000)
neighbor_cells <- gTouches(mygridspolygons[ix], my_other_cells, byid=TRUE);
neighbor_cells_ids <- my_other_cells$unit_id[neighbor_cells == TRUE];
if(length(neighbor_cells_ids) > 0)
first_neighbor <- mygridshp[mygridshp@data$unit_id==neighbor_cells_ids[1],];
new_cell <- aggregate(rbind(first_neighbor, mygridshp[ix,]));
new_cell <- gUnaryUnion(spgeom=union(first_neighbor,mygridshp[ix,]));
Any better idea how to do this?
r merge vector-grid
edited 2 days ago
Andre Silva
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the picture.
I loop over all cells and see which one has to be merged, then I get its neighbors with gTouches, but I couldn't get it work with functions like gUnaryUnion and aggregate.
Here is my code:
for(ix in(1:length(mygridshp)))
if(mygridshp@polygons[[ix]]@area < 20000)
neighbor_cells <- gTouches(mygridspolygons[ix], my_other_cells, byid=TRUE);
neighbor_cells_ids <- my_other_cells$unit_id[neighbor_cells == TRUE];
if(length(neighbor_cells_ids) > 0)
first_neighbor <- mygridshp[mygridshp@data$unit_id==neighbor_cells_ids[1],];
new_cell <- aggregate(rbind(first_neighbor, mygridshp[ix,]));
new_cell <- gUnaryUnion(spgeom=union(first_neighbor,mygridshp[ix,]));
Any better idea how to do this?
r merge vector-grid
r merge vector-grid
edited 2 days ago
Andre Silva
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Andre Silva
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Andre Silva
7,772113785
edited 2 days ago
Andre Silva
7,772113785
edited 2 days ago
Andre Silva
7,772113785
7,772113785
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
asked Mar 28 at 16:46
Ahmed LaatabiAhmed Laatabi
1113
1113
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Ahmed Laatabi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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