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One of the desirable features for COD-AB datasets is a line shapefile with codes designating the administrative level of each line segment i.e., '0' representing international borders (but '99' representing coastlines), '1' representing lines between distinct administrative level 1 units, etc.  These files are necessary for the best cartographic symbology so that, for instance, they avoid an administrative level 2 boundary symbol appearing along an international border.  ITOS makes these line shapefiles when they process your countries but if you are not yet ITOS processed you can also make them yourself with these instructions 

Step-by-step guide

Load the input polygon shapefile into ArcMap

  • Create the polyline shapefile, either with ArcGIS Advanced or ET GeoTools.
    • ArcGIS Advanced option (option 1 of 2):
      • Run the ArcGIS ‘Polygon to Polyline’ tool (Toolbox > Data Management Tools > Features > Polygon To Line) with:  Input Features = ‘input polygon shapefile’; Output Feature Class = as desired; ‘Identify and store polygon neighboring information (optional)’ = selected; and All environment settings set as default

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