I have a erosion map and land use map in DWG files, made of regions (boundary) and hatches.
How to convert regions or hatches to polygons?
This is the picture of the map in DWG file.
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In autocad there is a command "_HATCHGENERATEBOUNDARY", select all hatches and apply this command. This will generate a polyline to all hatches than import/export polyline to polygon.
Regarding to regions.
1.Select all regions and apply explode command.
2.This will convert all regions to line.
3.Than if you have no acadmap apply comand "pedit"-polyline edit and chose multiple.
4.Than chose option "Join".
5.This will convert all lines to polylines.