I am very new to ArcGIS and have the following problem: I have a shapefile with around 1500 regions worldwide and want to calculate for each region the distance up to the coastline of its own country (or if the country has no access to the ocean, the nearest coastline).
I have a shapefile with data on all coastlines worldwide. However, the lines forming the coastlines are not country-specific (i.e. there is not 1 line feature for the coastline of each country).
Is it possible to extract national coastlines from this data? How could I proceed?