Ask A Cartographer

Carto Representation that looks like dissolve.

April 07 2008 | 0 comments

Do you know if a Cartographic Representation (CR) can be created that would give you the same visual result as a 'Dissolve'? The result would be the visual removal of the interior lines between polygons that have the same value in a particular attribute. At this time, we are carrying and maintaining 2 -3 extra feature classes in our production DB that contain different dissolves for use in carto products. Having a CR that would do the same would make our data maintenance life easier.

Mapping Center Answer:

Alas, this will need to remain a data editing issue, and can't really be reproduced with only symbology. The main problem to overcome is the definition of the new geometry from which cartographic representations will be drawn - you still end up having to create some type of dissolve or merge. There are a couple of ways you can make "reps" invisible or un-drawn, for example to remove internal polygon boundaries, but they will likely require as much data manipulation or editing as creating a new 'dissolved' dataset.

Polygons are particularly difficult to solve for this problem. Line types are a bit easier to symbolize as a group as they've got no internal boundaries. In which case you could create any number of additional feature class representations with unique rules based on various dissolve criteria.

If you would like to post a comment, please login.

Contact Us | Legal | Privacy |