I have a multipart polyline FC that has true curves (Oracle 18c SDE.ST_GEOMETRY).
I want to update the coordinates of the vertices in the lines via ArcPy — without losing the true curves:
import arcpy connection = "Database Connections\my_conn.sde" feature_class = connection + "\my_owner.my_fc" spatial_reference = arcpy.Describe(feature_class).spatialReference with arcpy.da.Editor(connection) as edit_session: with arcpy.da.UpdateCursor(feature_class, "SHAPE@") as cursor: for row in cursor: geometry = row.densify("ANGLE", 10000, 0.174533) parts = arcpy.Array() for part in geometry: points = arcpy.Array() for point in part: point.M = geometry.measureOnLine(point) points.append(point) parts.append(points) row = arcpy.Polyline(parts, spatial_reference) cursor.updateRow(row)
The script reconstructs and replaces the geometry of the lines. So, unfortunately, it removes the true curves from the shapes.
Before running script:
After running script:
Could ESRI consider giving us a clean way to edit vertices — without removing the true curves from the SHAPE?
- I don't want to densify the curves into straight segments...I want to keep the true curves.
- It would be ideal if there were a clean way to do this; not a workaround like converting to JSON and parsing out the curve info from the JSON text (would be messy/fragile).
For example, a simple method like this would be helpful:
UpdateVertex (shape, partNum, vertexNum, [z, m])
#It wouldn't replace the shape or replace the vertex. It would *update* a coordinate in the vertex.
#So the true curves would remain intact.
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