I am teaching myself GIS at the moment, and there are still some matters I haven't quite got the hang of.
I'm using ArcGIS 10.1, and have three datasets:
LAYER 1: A population dataset at a high resolution, as a tiff raster. (Edit: the convert to polygon tool does not work on this raster)
LAYER 2: A polygon layer, created as a fishnet, of equal squares, defined by two vectors.
LAYER 3: An outline of the coastline.
What I need to do is to calculate the total population within a buffer of distance X km from the coastline for each polygon defined by the fishnet, that falls on the coastline.
I am currently struggling to combine the population data with that of the polygon layer however - any ideas?