The regions may change shape when polygons or arcs are dissolved. Region subclasses are maintained with the POLY and NET options. This tool maintains all section subclasses. If the LINE option is specified, sections residing on merged arcs will have their F-POS and T-POS values adjusted so they occupy the same set of locations as previously. If the NET option is specified, sections attached to any deleted arcs will be removed and ARCLINK# will be renumbered. Route systems are copied to the output coverage. If a pseudo node has attributes that are not zero or blank, arcs will not be joined for polygon features. If #ALL is used as the dissolve item, input coverage item definitions and data are preserved in the output coverage but User-IDs will be altered. The output coverage PAT with the POLY option or the output coverage AAT with the LINE option will only contain the dissolve item but no additional attributes. With the POLY option, Dissolve will remove dangling arcs and pseudo nodes. Two colinear arcs, one representing a road that follows the second, a stream, are maintained as colinear. Coincident and colinear line segments are preserved additional vertices may be inserted. If there are arcs that appear to intersect, but do not, nodes will not be inserted at the apparent intersection. These may include arcs representing utility cables at different levels or a road passing over a stream. The output coverage cannot already exist.ĭissolve maintains linear data belonging to different planar graphs in the same coverage. The merging of polygons with this tool is the counterpart of intersecting polygons in overlays. Although the input coverage may contain information concerning many feature attributes, the output coverage contains information only about the dissolve item. This tool is used to create a simplified coverage from one that is more complex. Creates a new coverage by merging adjacent polygons, lines, or regions that have the same value for a specified item.
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