i like to get the neighbors of the Parcels "P1" like following :
From B1 to B2 => P5
B2 => P4
From B2 to B3 => P3
From B3 to B4 => P2
From B4 to B1 => P6
i like to make this process automatic by a GIS software like ArcGIS or Postgis, i have thought to make a buffer of the parcel P1 , to get the lines of the boundary of P1 but i will not get the parcel P4 as neighbor .
any solution to get the neighbors like described above.
Best Answer
I have tried to make the possible solution simpler but it seems to be the only solution, but i like to have any suggestions .
For Arc based adjacent it's enough , but for adding node based adjacent , we need to add those steps:
from polygons get vertices => nodes.
make spatial join between polygon_buffer and nodes with "one to many" , to get all the polygons touching the nodes => sp_nodes_buffer.
take a node based neighbors only if the number of neighbors per node is > 3. if not we will ignore the node.