I have count data of bird sightings that I would like to plot . The sightings were taken from both the north and south bank of an estuary . The area was broken up into multiple sectors and I have two coordinates (for each sector) along the river bank that define each sector. I need to give these sectors a spatial definition in order to create a link to the bird count. I could possibly create a shape file by just drawing multiple polygons but is there a better way of tabulating the coordinates that I have?