There are two shapefiles. One is a compilation of municipalities on the coast with borders extending into ocean. The second shapefile is a coastal border.
I'm trying to clip the municipality shapefile with the coastal border shapefile to remove the municipality sea territory from my image, but I've had little success. The municipality boundaries are contiguous, so the coastal border on the second shapefile needs to cut and remove the excess shape.
I'm using QGIS 2.14.3-Essen. I've googled around and tried several strategies. I've used a lot of the GeoProcessing Tools (difference, intersect, clip, union) and what returned was an invisible shapefile.
What should I try to make it work?
Below is a copy of the screen settings for the clip. The results was yet another invisible layer.
Below this is a screencap of municipality boundaries to be cut (CITY) and the coastline in red to cut them (SMC_BORDER).