thanks phil
new problems......
i created a map with autocharts shorelines...(not very accurate) and updated my sd zerolines card...
then decided to draw my own improved shore line in google earth and import
then created map with my new improved shorelines and updated zerolines sd card
but the zerolones sd card map includes an ovelap of the old data i dont want!
does anyone know how to edit the sd zerolines card map??
it seems i can edit the map on the pc but not the sd card data??
suggestions?? see attached image i put a waypoint on the incorrect data i wish to edit