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How are polygon boundaries written out in Excel?
Each input polygon boundary will be written out as an enclosed line feature. A multipart polygon will become a multipart line in the output. The attributes of the input features will be maintained in the output feature class. A new field, ORIG_FID, will be added to the output and set to the input feature IDs of each line.
What is the FID of a polygon with no neighbors?
Therefore, for a polygon with no neighbors to the left side (outside) of its outer boundary and the left side (inside) of the hole boundary, the resulting lines will have a value of -1 for LEFT_FID and the polygon feature ID as the RIGHT_FID.
How is the outer boundary of a polygon stored?
The following scenarios help you understand the process and output in more detail: In a polygon geometry, the outer boundary is always stored in a clockwise direction. If the polygon has a hole, the hole (or inner) boundary is always stored in a counterclockwise direction.
What happens when a polygon has a hole?
If the polygon has a hole, the hole (or inner) boundary is always stored in a counterclockwise direction. Therefore, for a polygon with no neighbors to the left side (outside) of its outer boundary and the left side (inside) of the hole boundary, the resulting lines will have a value of -1 for LEFT_FID and the polygon feature ID as the RIGHT_FID.
How to convert a line to a polygon?
For converting lines to polygons, see also st_polygonize below. convert from XX to MULTIXX, e.g. LINESTRING to MULTILINESTRING convert from MULTIXX to XX if MULTIXX has length one (else, it will still convert but warn about loss of information)
What happens when two polygons share a boundary?
If two polygons share a portion of their boundaries, one output line will be generated representing the shared segment. The line direction will be arbitrary; the LEFT_FID and the RIGHT_FID will be set to the left or right polygon feature IDs accordingly.
How does a polygon to line work in ArcGIS Pro?
If a polygon contains another polygon, one output line in the clockwise direction will be generated representing the shared boundary, with its LEFT_FID set to the outer polygon feature ID and the RIGHT_FID set to the inner polygon feature ID.