Cartographica's buffering tool allows for positive and negative values for Polygon layers (negative buffering doesn't make sense on Line and Point layers). If you want to inset a polygon by an amount, just enter a negative number in the distance field and Cartographica will create the
new polygons inset by the specified distance.
For more information on how to create Buffers using Cartographica read our blog post: Creating Negative Buffers.
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