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Includes inset showing Portsmouth to Biddeford.
Indicates number in a town and density by county.
Relief shown by contours, spot heights, and landform drawings. Depths shown by soundings and isolines.
Relief shown by contours and spot heights.
Depths shown by soundings and stippling.
Oriented with north toward the upper right.
Relief shown by hachures.
Bird's-eye view.
Depths shown by soundings.
Depths shown by soundings and isolines.