Dissolve Solver for Manifold® System Release 4.50
Dissolve Solver for Manifold® System Release 4.50
The Dissolve solver package is a free upgrade for registered Manifold System 4.50 users. Don't have Manifold System? Visit the Manifold.net Online Store right now and get a copy for only $145.
Download the Dissolve Solver Package (Requires Manifold System 4.50)
This solver package installs a Dissolve solver into the Solvers - Spatial Analysis menu of Manifold System Release 4.50. Dissolve is so named because it "dissolves away" or removes the borders between areas that have identical values in data attribute fields. Given a set of areas, it can automatically create new areas that are spatial combinations of areas having the same data attributes.
For example, the map at right shows US counties in several states surrounding Massachusetts. Each county is a polygonal area that has several data attribute fields such as its Name, the State in which the county exists, a FIPS code for the state/county and so on. The lighter region shows the counties we have selected for use with the Solver.
Our
task is to combine all counties having the same value in the ST (two
letter State name abbreviation) field to create new areas.
Manifold's Dissolve solver is easy to use. It's completely Windows driven for simplicity and ease of use. The dialog at left shows the main solver dialog. We can double-click into the Match box for any of the data attribute fields and change the Match requirement to Yes to use that field in the dissolve operation.
In the example, we will use the state
abbreviation field, ST, to match areas to be combined into one. We
will not use any other fields. However, if desired in a more sophisticated
Dissolve operation, we could specify a Match on more than one
field. In that case, we could change the Match: option box from
either "all fields" to "any field" to combine
on a match on any field or force a match on all data attribute fields before two
areas are combined into one.
The Inherit option says how the newly-created area should inherit the data attributes of the areas that were used. Other choices for numeric fields include Min, Max, Avg and Sum. For example, Sum would place the sum of the data attribute values for that field into the same field for the newly-created combined area polygon.
When we press OK, the Dissolve solver goes to work and creates new
area polygons in the active layer that are combinations of the areas used as
sources.
In the example, we have created new areas that are the county areas combined by the ST field. This combines all counties with MA together, all CT counties, all NY counties and so on. The illustration at right shows the new areas drawn in the same color for simplicity. The image at left, below shows the resultant areas colored in different colors.
Thank You Manifold Users for Voting
This solver was one of 11 voted on by Manifold System Release 4.50 users for implementation as one of the free solvers we release every week or two. We'd like to thank all Manifold users for sending us their requests and for participating in the voting for new features and improvements to Manifold System.
Please continue sending comments and suggestions regarding new ideas for Manifold System Release 4.50. Every new release of Manifold (about nine months between releases) contains many improvements and new ideas suggested by users. The Dissolve package is just one such example.
Download the Solver Package Today
To repeat, this solver package is a free download for Manifold System Release 4.50 users. We value your patronage and hope you enjoy these cool new solvers we have created for you.
Download the Dissolve Solver Package (Requires Manifold System 4.50)
Don't have Manifold System yet? Visit the Manifold.net Online Store right now and get a copy for only $145.
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