NEWS

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fsr 2.0.1 (2024-01-10)

Minor change

• Replaced lwgeom::st_perimeter() by sf::st_perimeter() (available in version 1.0.15). The package lwgeom is now under Suggests field (fix #33).

fsr 2.0.0 (2023-07-04)

Major changes

• Defined a new hierarchical structure for defining the spatial plateau data types:
  • Added two new spatial plateau data types: pcollection and pcomposition.
  • Redefined the class named pgeometry.
  • Defined three spatial plateau data types that are subclasses of pgeometry: ppoint, pline, and pregion.
  • Specified validity methods for all classes according to the rules of the Spatial Plateau Algebra.
  • These modifications are based on the pull requests performed by Pedro V. A. B. de Venâncio, who is added as a contributor of the package fsr in the current version (#26 - @pedbrgs and #27 - @pedbrgs).
• Added spa_get_type() (based on the pull request #27 - @pedbrgs).
• Updated and improved functions that create pgeometry objects: create_pgeometry() and create_empty_pgeometry() (#27 - @pedbrgs).
• Improved the creation of components by redesigning create_component(). component_from_sfg() is deprecated (it will be removed in the next version of the package).
• Enhanced fsr_plot() and added the support for pcollection and pcomposition objects.
• Added two new external functions that handle pcollection objects: spa_flatten() and pcollection_to_pcomposition() (based on the pull request #31 - @pedbrgs). They are also used by fuzzy geometric set operations on pcollection objects.
• Enhanced fuzzy geometric set operations, which can now handle different data types as input (based on the pull request #31 - @pedbrgs).
• Deprecated spa_common_points() - use spa_intersection() to get the common points of two plateau line objects.
• Deprecated spa_boundary_pregion() - use spa_boundary to get the boundary of a spatial plateau object.
• Enhanced general operations (e.g., spa_core(), spa_boundary()) to deal with the new spatial plateau data types (based on the pull request #31 - @pedbrgs).
• Added three new general operations: spa_alpha_cut(), spa_strict_alpha_cut(), and spa_range().
• Removed the dependency of packages FuzzyR and utils.

Minor changes

• Better organization of the source code by creating more R scripts and rearranging the functions and classes in them.
• Updated format.pgeometry() to include a parameter that determines the maximum number of characters that are shown.
• Updated spa_pwkt() to deal with the new classes (based on the pull request #26 - @pedbrgs).
• Updated spa_is_empty() to deal with the new classes (based on the pull request #26 - @pedbrgs).
• Updated as_tibble() to deal with the new classes.
• Extended fuzzy numerical operations to deal with the new classes (based on the pull request #30 - @pedbrgs).
• Updated fuzzy topological relationships due to the changes in other operators (based on the pull request #31 - @pedbrgs).
• Minor changes in functions of the construction module to use improved operations when manipulating spatial plateau objects.

Change in the list of authors

• Added Pedro Vinícius Almeida Borges de Venâncio (@pedbrgs) as a contributor to the fsr.
• We are grateful for the contributions of Felippe Galdino (@ocfgaldino) and Juliana Strieder Philippsen (@JulianaStrieder) in the first version of the package (1.0.0, 1.0.1, and 1.0.2). Their participation in the package was concluded; thus, they were removed from the list of authors in this version of the package, which includes several changes, improvements, and new methods.

fsr 1.0.2 (2022-07-05)

Minor changes

• Added the parameter d_tolerance in the spa_creator() function. This parameter is employed by the package sf when computing the Voronoi diagram and Delaunay triangulation in the corresponding construction policies.

Bug fixes

• Fixed the fuzzy numerical operations when dealing with empty objects.
• Fixed spa_core() to return an empty crisp spatial object when the input has not a core.
• Fixed some if statements and calculations in the fuzzy topological relationships.
• Fixed the clipping operation in spa_creator() when using the construction policies based on the Voronoi diagram and Delaunay triangulation.

fsr 1.0.1 (2022-01-25)

Major changes

• Added a new construction policy in the spa_creator() function based on the convex hull (an improved implementation from the issue #29).

Minor changes

• Added the publication that describes the fsr package into CITATION.
• Added an optional parameter in spa_creator() named digits (an improved update based on the pull request #28 - @leticiabohnert).

Bug fixes

• Fixed spa_add_component() for checking a specific condition.
• Fixed the management of CRS when plotting spatial plateau objects (fsr_plot()).
• Fixed the management of geometry collections resulting from some geometric computations of the spatial plateau geometric set operations.

fsr 1.0.0 (2021-09-16)

• This is the first release of fsr that consists of the following modules:
  • Fuzzy Spatial Inference Module (e.g., functions to create a fuzzy spatial inference model and functions to evaluate it).
  • Fuzzy Spatial Data Handling Module (e.g., fuzzy numerical operations, fuzzy geometric set operations, and fuzzy topological predicates).
  • Construction Module (e.g., spa_creator()).
  • Basic Module (e.g., S4 classes and basic functions).