Release Notes

Boost 1.70

Improvements

526 New line interpolate algorithm.

Solved issues

450 Not supported negative distance in geodesic direct formulas.
466 Invalid result of spherical/geographic disjoint(box, polygon).
547 Undefined behavior in rtree constructed with zip_iterator.
560 Inaccuracy of karney_direct formula.
577 R-tree with interprocess allocator compilation error with clang.
579 Invalid result of spherical/geographic disjoint(segment, box).

Bugfixes

538 Workaround for msvc-12 faulty array initialization.
553 Pass spheroid correctly in geographic comparable strategies.
570 Fix for spherical/geographic distance between geometries.
571 Fix nan result in geographic distance.
Workarounds in R-tree for compilation errors with gcc-4.6 and msvc-10, 11, 12.

Changes in behavior

Different strategies expected in envelope for some combinations of geometries.

Boost 1.69

Improvements

486 Karney's solution of direct geodesic problem for internal use (thanks to Adeel Ahmad).
490 Discrete Frechet and Hausdorff distance algorithms (thanks to Yaghyavardhan Singh Khangarot).
496 New run-time and upgraded compile-time SRS transformation interfaces (undocumented for now due to potential interface changes).

Solved issues

520 Missing documentation for dsv().
521 Wrong documentation description for distance().
524 Fixed 'enumeration values not handled in switch' warnings.
527 Workaround for VS 2017 (msvc-15).

Bugfixes

505 Fixed overflow in overlay algorithms (thanks to Dane Springmeyer).
518 Fixed passing of temporaries in append() (thanks to xventura81).
522 Support python3 in building documentation.

Boost 1.68

Improvements

469 Horizontal grid shift (nadgrids) in SRS transformations (undocumented for now due to potential interface changes).
478 Box-Segment distance for spherical and geographic coordinate systems.
487 Missing combinations of geometries in distance for spherical and geographic cs
489 Additional direct geodesic problem formulas for internal use

Solved issues

470 Assertion failure with short spherical and geographic segments.
471 Invalid envelope of spherical polygon
498 Unexpected results with expand() and make_inverse() for spherical and geographic CS
504 Unused parameter warnings.

Bugfixes

488 Handle non-true-references in closing_iterator and ever_circling_range_iterator
495 VxWorks 7 cross-compilation issue.

Boost 1.67

Improvements

New map projection and SRS transformation representations (undocumented for now due to potential interface changes).
New densify() algorithm.
No longer using std::iterator (thanks to Daniela Engert).
No longer using allocator directly in the rtree. Replaced with boost::container::allocator_traits (thanks to Daniela Engert).
Default rtree allocator changed to boost::container::new_allocator to still support move semantics emulation in C++03 with boost::container::allocator_traits.
Area strategies interface changed. This is potentially a breaking change.
Radius or Sphere can be passed into spherical strategies.
Added Point-Box and Box-Box spherical and geographic distance() strategies.
Simplify (multi)polygons will discard output rings of 2 points or (for closed polygons) 3 points, but it tries to avoid creating those
Simplify (multi)polygons will omit empty interior rings or polygons from output

Solved issues

13386 Workaround for some gcc compilers
13381 Compile error with matrix_transformer in Visual C++ 2015
13436 Incorrectness in boost::geometry::model::polygon documentation

Bugfixes

Add missing strategy resolving in length() algorithm, affecting Variant support.
Simplify (multi)polygons now simplifies closing point

Changes in behavior

Simplify (multi)polygons now usually rotates input rings before simplifying to select a non collinear point on its convex hull. This improves output.

Boost 1.66

Improvements

Add distance for geographic PointLike/AnyGeometry.

Solved issues

12503 Validity of complex polygon

Bugfixes

Fixes in validity of union/intersection/difference which were sometimes invalid. In most cases, results are valid now.
Fixes in validity of buffer which were sometimes invalid. In most cases, results are valid now.
Fixes in results of union/intersection/difference which could be incorrect in very complex cases
Fixes in set and relational operations for non-cartesian coordinate systems.

Boost 1.65

Improvements

Add correct() overload taking area strategy
Add is_convex() overload taking side strategy
Add missing relational operations (covered_by, crosses, equals, etc.) for MultiPoint/AnyGeometry

Solved issues

12410 Lack of support of geographic coordinate system in correct()
13035 Wrong result of non-cartesian intersection strategies for segments near poles.
13057 Wrong result of intersects() for linestrings caused by numerical issue in disjoint() for boxes.

Bugfixes

Fix is_valid which could return false for multipolygons where an interior ring touches another interior ring
Fix is_valid which could return false for multipolygons where a polygon was located in an interior ring, all touching each other
Fix union which could produce invalid results (for some cases, this needs to define BOOST_GEOMETRY_INCLUDE_SELF_TURNS)
Fix intersection (idem), but some cases are still not yet valid
Fix difference (idem), but some cases are still not yet valid
Fix propagation of area strategy into the internals of various algorithms from intersection strategy
Fix uninitialized variable in relate and reference to temporary in overlay
Fix error in disjoint for geographic Segment/Box
Fix handling of non-cartesian geometries in various algorithms

Boost 1.64

Improvements

matrix transformation is now based on Boost.QVM instead of Boost.Ublas

Breaking changes

ublas_transformer is renamed to matrix_transformer
explicit modifier is added to constructors of rtree index::dynamic_* parameters
strategy::area::huiller replaced by strategy::area::spherical

Solved issues

363 Missing includes in geometry/index/parameters.hpp
364 within(Linear, Areal) compilation error when arguments use different point types
370 Buffer Seg Faults with Ring as Input

Solved tickets

11899 boost::geometry::equals doesn't handle open polygons
11930 Inaccuracy of area::huiller strategy
11931 Wrong spherical area with pole encircling polygons
12566 Ambiguous template instantiation in equal_to<> when pair value contains raw pointer
12861 Segmentation fault in stdlibc++ (gcc 4.8.2) affecting rtree
12885 Use BOOST_THROW_EXCEPTION instead of throw

Bugfixes

Fix distance_measure in get_turn_info

Boost 1.63

Improvements

Intersection: take care that output is valid (work in progres, not yet finished - but more is valid)

Solved tickets

12289 Avoid warning/compilation error for std::cout
12412 Invalid result of covered_by() with geographic Points and Boxes
12413 rtree::remove() not working properly with geographic Points

Boost 1.62

Improvements

Union: take care that output is valid (with some exceptions), also with self-tangent polygons or shared edges
SVG: support boost::variant of geometries
SVG: coordinates are now written as double (by default) to svg
Rename namespace concept to concepts to avoid conflicts with the newest compilers
New spherical intersection strategy used in relational and set operations for spherical and geographic Geometries (previously cartesian intersection strategy was used for all coordinate systems).

Solved tickets

12189 Relational operations not compiling when point types of inputs are different (cartesian, affecting rtree)
12287 Invalid result of rtree.query() for contains() predicate
12342 Relational operations not compiling when point types of inputs are different (geographic, affecting rtree)

Boost 1.61

Additional functionality

Support within and covered_by for Box/Box in spherical and geographic coordinate systems.

Improvements

Overlay: handle_tangencies replaced by clusters, fixing many cases with colocated turns

Solved tickets

9162 Invalid result of relational operations for non-cartesian Point/Areal.
10866 union_ doesn't work in 1.56 and 1.57.
11018 Invalid geometry intersection
11576 Intersection gives wrong results.
11637 Unused parameter warning.
11725 union_ fails to create holes
11789 Assertion failure or invalid result of set operations for spherical_equatorial coordinate system.
11917 Andoyer distance strategy returns 0 for antipodal points (default geographic distance).
11928 Improvement of the accuracy of surveyor (cartesian) area strategy.
11966 Compilation error in svg() for box and non-int coordinate type.
11984 union_() generates self-intersecting polygon
11987 rtree::remove() not compiling for geographic CS.
12000 Uninitialized reference in (unused) constructor of relate's mask_handler.
12106 Invalid assertion failure in envelope() for non-cartesian very short segments.

Bugfixes

Fix intersects and disjoint for Segment/Box in cartesian coordinate system when Segment is parallel to Box's face.
Fix relation operations for Point/Areal in spherical and geographic coordinate systems for edge cases.
Fix intersects and disjoint for Point/Box and Box/Box in spherical and geographic coordinate systems for some cases.
Fix within and covered_by for Point/Box in spherical and geographic coordinate systems for some cases.

Boost 1.60

Solved tickets

10803 Union algorithm returning invalid geometry
11522 Namespace clash in buffer for traits::detail
11533 Assert failure in rtree caused by a bug in remove() if min elements number is 1
11607 Private geometry::exception::what()
11709 is_simple segfault
11710 is_simple - empty geometry logic
11711 is_simple and is_valid - Points that are NaN or Infinity

Bugfixes

Fix colocations of touching interior ring / exterior ring, where it also touches another polygon
Fix removing values from an empty rtree - no effect and 0 returned instead of assertion failure
Fix segfault in centroid for multi geometries containing empty single geometries (thanks to Jiri Drbalek)
Fix liang_barsky strategy for integral coordinates (thanks to Dane Springmeyer)

Boost 1.59

Additional functionality

Added rtree const_iterator, begin(), end() and the support for Boost.Range.
The support for C++11 std::initializer_list in geometries models.
Disjoint and intersects support the following geometry combinations: multipoint/linestring, multipoint/multilinestring.
Added relate() and relation() algorithms.
Intersection has been implemented for combinations of pointlike and linear geometries
Added implementation for difference(pointlike, linear)
New algorithm is_empty, returning true if the geometry represents the empty set
The envelope algorithm supports pointlike and linear geometries in the spherical equatorial coordinate system
The envelope algorithm supports pointlike geometries in the geographic coordinate system

Improvements

Upgraded rtree const_query_iterator category to ForwardIterator.
Buffer performance of buffers around multi-points is improved significantly

Breaking changes

buffer side strategy now returns error_code instead of bool. If you have your own custom side strategy, it should be adapted

Solved tickets

11113 Support easy enumeration of all elements with BOOST_FOREACH
11232 Feature request - relate()
11236 Invalid result of centroid() for integer coordinate type
11268 Regression in boost::geometry::intersection interface with multi_linestring and box -- does not compile on 1.57 VS 1.55
11332 Assertion failure in buffer for extreme coordinate differences
11346 Segment iterator does not work with ranges returning values instead of references
11436 sym_difference(py1, py2, mpy) returns invalid multipolygon

Bugfixes

Buffer: use a more robust way to calculate the side of an intersection, this fixes several errors in buffer generation
Fix in selection of segment to which calculate from IP from, in intersection of two segments. Now is selected the one close to a segment-point point, or else the one on the shortest segment. This avoids (rarely occuring) generation of tiny triangles making output polygons invalid
In rescaling round instead of truncate to the integer grid (this fix and the previous mentioned can have some impact on output geometries)
Fix potential infinite loop in detail::has_spikes (the loop can happen if the points passed have NaN coordinates)

Boost 1.58

Additional functionality

New algorithm num_segments, returning the number of segments of a geometry
New overload for is_valid algorithm, that takes a string reference as a second argument and fills it with a message related to the validity or invalidity of the geometry
New overload for is_valid algorithm, that takes an enum reference as a second argument and fills it with a value related to the validity or invalidity of the geometry
Disjoint and intersects support the following geometry combinations: point/multipoint, multipoint/multipoint, multipoint/segment, multipoint/box

Improvements

Buffer now supports flat-ends for linestrings with a bend close to the start (such that buffered segment crosses flat-end).
Buffer performance is improved significantly
Partition performance is improved significantly for polygons, potentially enhancing all overlay operations

Solved tickets

8379 Invalid comparison of the result of determinant
10108 Error in overlay operations in specific cases where geometries touch at one point
10201 Suggestion to use different function to compare coordinates [wontfix]
10467 Template parameter name coliding with B0 macro name defined in termios.h
10640 Invalid result of buffer() for CCW Polygons.
10666 MSVC compiler warning C4127: conditional expression is constant
10747 Error in rescaling causing errors in areal/areal set operations
10770 Buffer fails for large distances, or rough round joins, where concavities where not intersected properly
10658 sym_difference yields bad result for int polygons
10835 Difference of multilinestring and polygon yields wrong result
10861 Rtree failing to compile for Value being a pair or a tuple containing pointer to Geometry and the default equal_to<> used
10863 Template parameter name coliding with B0 macro name defined in termios.h (duplicate of 10467)
10887 Invalid result of within() and relate() for Linear/MultiPolygon
10890 Invalid result of disjoint() for Point/Segment.
10904 Invalid calculation of most significant Dimension of a segment in relate_cartesian_segments strategy
10912 Invalid result of within() and relate() for Areal/Areal
10951 Tests failing on windows with intel compiler due to lack of /bigobj flag.
10957 Assertion failure and invalid results of various relational operations.
10958 Invalid results of disjoint() L/L and L/A.
10959 Assertion failure in get_turns() used with no_rescale_policy.
10960 Invalid result of get_turns() for L/A, missing turn.
10961 Invalid result of get_turns() for L/A, invalid turn for a Linear spike.
11112 Compilation failure on Solaris due to a CS name clash (used for a macro on this platform)
11121 Invalid result of difference() for integral coordinates

Bugfixes

Bug in multipoint/polygon multipoint/multipolygon distance computation (wrong detection of points inside the areal geometry)
Bug in flatten_iterator's assignment operator causing an access violation
Bug in Cartesian segment-segment intersection strategy when one segment degenerates to a point and is collinear to the other non-degenerate segment
Bug in centroid(), non-deterministic result if calculated for e.g. a Polygon with zero-area.
Bug in buffers for joins with a limited number of points
Bug in buffers for round joins with limited number of points around sharp corners
Bug in buffers for joins with large buffer distances
Bug in buffers for round ends with an odd number of points
Bug in buffers for flat ends with large buffer distances
Bug in buffers for interior rings with large negative buffer distances
Bug in closing_iterator not working properly when the input range is empty
Bug in is_simple, not handling properly closed simple linestrings within multilinestrings
Bug in rtree constructors taking a pair of Iterators or a Range (packing algorithm), the use of reference to destroyed temporary when Iterator's reference is not true reference, e.g. for some of the Range Adaptors. It also affects distance() and comparable_distance(). This bug may cause unexpected behavior of the rtree or distance() algorithm, e.g. an assertion failure or a SEGFAULT.
Bug in rtree count() member function, the use of reference to destroyed temporary when object of type convertible but not the same as value_type or indexable_type is passed. If this happens, wrong result may be returned, in most cases 0.
Bugs related to the handling of Ranges, preventing compilation of Geometries using non-Container Ranges in some algorithms (thanks to Samuel Debionne)

Boost 1.57

Improvements

The support of parameters convertible to value_type in rtree insert(), remove() and count() functions
Support for counterclockwise input/output in algorithm buffer
Support for open-geometry input in algorithm buffer (open output not yet supported)
Support for degenerate input (point-like linestrings, polygons) in algorithm buffer

Solved tickets

6443 Wrong degenerated hulls returned by convex_hull().
8402 Implicit conversion warnings
9354 Bug in winding strategy affecting within() and covered_by() for non-cartesian coordinate systems
10177 Missing include
10345 Distance fails to compile for some coordinate types
10398 Wrong neighbour check in buffer, calculating turns
10421 Invalid Point-Box distance for spherical CS
10562 Invalid number of Points in the result of convex_hull() for open output
10615 Rtree constructor feature request
10643 Invalid point_on_surface() result for big coordinates
10647 Invalid result of disjoint() in some cases when polygon is inside inner ring of other polygon
10668 Implicit conversion warnings (duplicated 8402)

Bugfixes

Several fixes of bugs in algorithm buffer
Bug in point_on_surface() for CCW Polygons (extreme_points()) and numerical issue (thanks to Matt Amos)
Bug in disjoint() for A/A fixed by replacement of point_on_surface() with point_on_border() (thanks to Matt Amos)
The result of convex_hull(), duplicated Point in open output, too small number of Points for 1- and 2-Point input
Imprecision for big coordinates in centroid(), fixed by Points translation (related with ticket 10643)
for_each_segment() not taking into account the last segment of open Geometry

Boost 1.56

Additional functionality

New algorithm buffer for inflating/deflating geometries (buffer itself already existed but that was only to enlarge a box)
New algorithm remove_spikes, algorithm to remove spikes from a ring, polygon or multi_polygon
New algorithm point_on_surface, generating a point lying on the surface (interior) of the polygon
New algorithm is_simple, returning true if a geometry is simple according to the OGC standard
New algorithm is_valid, returning true if a geometry is valid according to the OGC standard
New algorithm crosses for checking this spatial relation according to the OGC standard
The set operation algorithms (difference, intersection, sym_difference and union_) now support as input pairs of pointlike or linear geometries
The distance and comparable_distance algorithms now support all pairs of geometry combinations
The spatial relations which didn't support it (covered_by, touches, within, etc.) now support as input linear and/or areal geometries
The support for boost::variants as input geometries in various algorithms
The rtree support for indexing segments
The rtree nearest() predicate support for arbitrary geometries

Improvements

The rtree pack-creation algorithm optimization (thanks to Lu Wang)

Solved tickets

8310 Wrong results with overlapping polygons (fixed using point_on_surface for disjoint)
8375 sym_difference of non-closed polygons returns closed polygon
8376 difference of non-closed polygons returns closed polygon
9081 Booleans create self-intersecting polygons from non-self-intersecting polygons
9245 Check for process errors in make_qbk.py
9563 (Sym)difference not successful, fixed by rescaling to robust type
9628 Wrong result of within() due to the winding strategy not working correctly for nearly-horizontal segments
9828 boost::geometry::union_(...) creates redundant closing point
9871 Remove spike in polygon with only a spike
9941 Add support for touches(box, box)
9947 Missing info about WKT in documentation
9759 Invalid results of R-tree knn queries for non-cartesian coordinate systems
10019 Difference of Linestring and Box returns their intersection
10077 Wrong types in concept checks in boost/geometry/arithmetic/arithmetic.hpp
10234 Wrong results of covered_by() for nearly-horizontal segments

Bugfixes

intersects(polygon) could return a self-intersection-point for its closing point, fixed
equals() could return invalid results for non-simple linear geometries according to the OGC standard, fixed
touches() didn't work properly for CCW areal geomtries, fixed
rtree nearest queries returned wrong elements for non-cartesian coordinate systems, fixed
rtree crashed in some cases when used with Interprocess allocator, fixed

Boost 1.55

Additional functionality

Added centroid for segment type
Added intersects() and disjoints() for Segment-Box and Linestring-Box
Added rtree creation using packing algorithm
Added contains() and covers() spatial query predicates
Added iterative queries

Documentation

Bugfixes

In some cases .back() or .clear() was called, violating the usage of Concepts. Fixed for the reported cases
Use consistent side information in cart_intersect and get_turn_info and handle_tangencies and enrich_intersection_info. This is done by switching to integer (if necessary) for the specific 6 points only, zooming in on the 4 or 3 segments

Solved tickets

6958 Intersection generates self-intersection. Caused by spike, fixed
8364 Invalid input exception, caused by spikes in previous steps, fixed
8365 Invalid input exception, caused by spikes in previous steps, fixed
8969 boost::geometry::model::point single argument constructor should be explicit
8825 Patch adding member variable documentation to doxygen_xml2qbk
8652 Intersection fails for triangle-triangle intersection. Caused by spike, fixed
9047 Boost files that include themselves (strategies/intersection.hpp), fixed

Internal changes

Adapted projected_point<> distance strategy, point-type in template is replaced by calculation-type
Adapted transform strategies, they have points now as member-template, and calculation-type as template. Similar to what was done for projected_point distance
Spikes (could be generated in difference) in integer-based overlays are now avoided during generation
Cleanup, removed old MSVC2005 project files
R*-tree balancing algorithm optimized

Boost 1.54

Additional functionality

added Spatial Index, developed for Boost.Geometry by Adam Wulkiewicz. The spatial index was originally started by Federico J. Fernandez during the Google Summer of Code 2008 program, mentored by Hartmut Kaiser.
added SVG-output, this was already in extensions for several years

Documentation

small fixes of missing words
fixes in doc of template parameters (convex_hull, exterior_ring, return_buffer)

Bugfixes

collinear opposite segments did sometimes (in circles) have a robustness issue, fixed
fixed insertion of false intersection point (found by buffer)
applied patch of Vladimir Petrovic for debugging traversals

Solved tickets

7462 degenerate union result for float, fixed
7465 wrong construtors access type in scale_transformer class, fixed
7802 cart_intersect.hpp unused parameter warnings, fixed
8254 faulty intersection, fixed
8393 polygon model doesn't adhere to stated Polygon concept rules, doc updated.
8403 silenced compiler warning C4127: conditional expression is constant
8405 silenced compiler warning C4189: '...' : local variable is initialized but not referenced

Internal changes

Made several algorithms variant-aware (append, area, clear, convert, equals, length, num_points)

Boost 1.53

Bugfixes

avoid generating output polygons with interior rings below minimum size (e.g. one or two points)
geometry::disjoint for degenerate segments (patched by Karsten Ahnert)
problem in geometry::difference for missing handling tangency, reported by H2
fixed geometry::for_each for use with Lambda's
fixed geometry::comparable_distance point-linestring (and -range, -polygon)

Additional functionality

combinations for geometry::disjoint: point/ring, point/polygon, point/multi_polygon
combinations for geometry::intersects: point/ring, point/polygon, point/multi_polygon

Internal changes

updates in specializations/not_implemented for various algorithms (as in an earlier version, these changes are still going on; they take care for simplified structs, better error reporting, and automatized documentation)
fixes in unit tests

Boost 1.51

Breaking changes

points accessed through a pointer (e.g. in a linestring) should now be specialized without the pointer. In previous versions a type my_point used like linestring<my_point*> had to be specalized like: template<> struct tag<my_point*>. Now the library itself removes the pointer before calling the traits class, so now it should be like: template<> struct tag<my_point>

Bugfixes

intersection was sometimes wrong for integer points, fixed
documentation, order of parameters in simplify was wrong, fixed

Solved tickets

7030 spherical distance, fixed (by patch of Karsten Ahnert)

Boost 1.50

Bugfixes

the return type of comparable projected point strategy for integer points was wrong (integer), fixed
several robustness issues in intersection of segments and polygons, fixed
invalid intersection output is filtered out
disjoint for multi_polygon's might incorrectly return true, fixed

Solved tickets

6585 patch for alternative syntax multipoint, applied
6584 patch for bug in distance, applied
5730 same issue as 6584, fixed
6166 patch for missing transformation, applied
6696 invalid intersection output, was (by chance) already fixed in Trunk before reported

Additional functionality

added algorithm "touches" (OGC SF compliant) for *polygon/*polygon

Boost 1.49

Breaking changes

point_xy was accidentally included in one of the headerfiles. If the point_xy class is used, it should be included explicitly now.

Bugfixes

bugfix: distance for multi-geometries ignored specified distance strategy. Fixed
bugfix: difference for polygon/multi_polygon (reported 2011/10/24 on GGL-list)
bugfix: raise exception for calculation of distances of multi-geometrie(s) where one of them is empty
bugfix: multi DSV did not correctly use settings, fixed
bugfix: self-intersections could sometimes be missed (introduced in 1.48), fixed
bugfix: convex hull crashed on empty range (e.g. empty multi point), fixed
bugfix: area/centroid/side/intersection/distance did not work for "int" type filled with large (but not overflowing) integers. Fixed.
bugfix: disjoint/intersect did not work for degenerate linestrings. Fixed.
bugfix: covered_by did not compile for a ring. Fixed.

Solved tickets

6019 convex_hull / area, fixed.
6021 convex_hull / append (multipoint), fixed.
6028 Documentation: closure, fixed.
6178 Missing headerfile, fixed.

Additional functionality

support for line/polygon intersections and differences
support for convert of segment/box of different point types
support for append for multi point
the scalar function distance now throws an empty_input_exception on empty input

Documentation

updated support status in several algorithms
updated conformance to OGC or std
other updates and fixes

Internal changes

updates in specializations/not_implemented for distance/convert/assign/area/with/covered_by
move of wkt/dsv to io folder, making domains redundant
warnings: strategy concepts assigned to zero to avoid clang warnings (patched by Vishnu)
warnings: there were several unused parameters, for which gcc/clang warned (patched by Christophe)

Boost 1.48

Bugfixes

Robustness issue, in some circumstances the union failed to output. Fixed.
Robustness issue, in some circumstances the calculated intersection point was outside the segment. Fixed.
Concept issue, cartesian intersect didn't understand segments other than the provided one. Fixed.
Sometimes self-intersections in linestrings were missed. Fixed.
The fusion coordinate system was not registered correctly. Fixed.

Solved tickets

5726 Segment intersection algorithm still assumes 'first', 'second' members
5744 Mistake in fusion adapt example
5748 Needed to include <boost/foreach.hpp>
5954 distance_pythagoras skips sqrt() step

Improvements on algorithms

Checking self-intersections is now not done automatically, this can blast performance.
Besides that, checking self-intersections is made faster.
Intersections now avoid outputting duplicate points. So they output the minimal set.

Additional algorithms

covered_by: within is defined as "within, not on boundary". covered_by is "within or on boundary"

Additional functionality

within: strategies can now be specified for within<point, box> and within<box, box>
convert: a much broader range of conversions is supported
assign: idem, (currently partly) synonym for convert (but reversed arguments)

Additional coordinate types

Basic (limited) support for Boost.Rational

Boost 1.47

Original release