A copy of Esa's Google Maps API experiments.
Polyline editor with CSV output
Api v2.111 gave us a nifty option to edit GPolylines MyMaps way.Search your start location:
Draggable Context Menu
'singlerightclick' opens a popup menu that is a GDraggableObject
CSV vertex list
CSV formatted text files have been used for placing markers but why not for polylines too.
The text field updates by map 'dblclick'.
update by 'lineupdated' too.
select all and copy/paste where it belongs.
When you came back later to edit a file you created earlier:
Paste your file to the text field and click [Draw from text field]
Rightclick on map and select [Go on editing]
A comment to be dragged on text field: