move dependency RPostgreSQL back to Suggests:, from Imports:

st_centroid.sf and st_point_on_surface.sf now also warn if attributes are not constant over geometries.

summarise now allows the user to define geometries for summaries; #714, by Kirill Mueller

plot.sf now emits a warning if col does not have length 1 or nrow(x), and requires pal (rather than col) to set a palette for factors.

plot.sf provides control over legend keys using key.length and key.width, decrease default key length; #731

sgbp objects receive an as.data.frame method; #715

GDAL read/write now supports logical variables; #722

add st_crop to simplify cropping objects with a rectangular area; #720

fix bug in [<- when columns are added to an sf object; #718

use dynamic registration of S3 methods, similar to how hms does this; #710 by Kirill Mueller

(partially) address writing GPKG to network drive, writing to temp file first; #628

add Kirill Mueller as contributor

st_make_grid is now faster; #708, by Dan Baston

st_read and st_write are now generic, with methods for directly reading from and writing to database connections; st_read_db and st_write_db are now deprecated; #558, thanks to Etienne Racine @etiennebr

Package RPostgreSQL moved from Suggests to Imports

restore compatibility with GDAL 2.0.x versions (which won't have gdal_utils); #686

read_sf can now also read tables without geometry; #684, by Andy Teucher

method distinct now works; #669, #672

+, -, * and / for pairs of geometries (sfg, sfc) now return geometric union, difference, intersection and symmetric difference, respectively.

st_cast from MULTIPOLYGON to MULTILINESTRING should now work properly; #660

all Rcpp interfaces needed by package stars have now been moved into sf; pkg stars is now R-only, and only sf needs linking to GDAL.

gdal_utils() now interfaces the 9 gdal utils using the C++ API

improve resetting (base) plots; add reset = FALSE in a call to plot to enable adding to plots that have a legend

st_read now returns a data.frame when a table contains no geometries, rather than giving an error; it does emit a warning in this case. See https://stat.ethz.ch/pipermail/r-sig-geo/2018-February/026344.html

move pillar from Imports: to Suggests:

update to the new rwinlib distribution of gdal (adds JPG2000); #639

speed up computation of centroids for largest polygon; #623

add st_as_sfc.raw method

Bugfix: binary operations (st_intersection, st_difference, etc) no longer fail when operating on data frames of class "tbl_df" with common column names; #644

add pillar to Imports: to provide method for printing WKT geometries in tibbles

st_as_text, and subsequently format and print, now use argument digits (or options(digits = n)) to control the number of digits used for printing coordinates; default is now options("digits"), which is typically 7.

st_is_within_distance now works with geographic coordinates

st_cast from MULTIPOLYGON to MULTILINESTRING no longer changes the number of features/feature geometries, but conversion from MULTIPOLYGON to LINESTRING now (typically) does; #596

st_distance for long/lat geographic coordinates now uses lwgeom, accepting all geometry types; argument dist_fun is deprecated as a consequence, and distance calculations are different from those in sf versions 0.5-5 or earlier; #593

add package lwgeom to Suggests; st_area, st_length, st_distance, st_segmentize for long/lat CRS now use package lwgeom instead of geosphere; #593

st_length now returns zero for polygon-type geometries; #593

if present, add units of attribute to default plot title; #591

add unnest method, which depends on tidyr > 0.7-2; #570 PR by @karldw

add largest option to st_join to get largest intersection match only; #547, by @tiernanmartin

change default maximum number of feature to print to 10, controllable by options(sf_max_print); #556

add Hausdorff (and Frechet for those with GEOS 3.7.0) as options to st_distance; add par for densified versions

add st_snap, for snapping geometries to other geometries, within a tolerance

make st_wrap_dateline a generic, with methods for sf, sfc and sfg; #541

plot.sf and st_as_grob (used by ggplot2) are now robust against misspecified ring directions (holes that have the same direction as the exterior rings), by using rule = "evenodd"; #540

functions depending on liblwgeom (st_make_valid, st_geohash, st_plit) have been moved to their own package, https://github.com/r-spatial/lwgeom; argument use_gdal of st_transform has been deprecated, instead one can now use lwgeom::st_transform_proj; sf now no longer tries to link to liblwgeom; #509, #537, #487

st_read, st_sf and st_sfc gain a parameter check_ring_dir (default: FALSE) that checks ring directions and corrects to: exterior counter clockwise, holes clockwise, when seen from above.

get rid of classInt::classIntervals warning if number of unique values is smaller than the number of breaks asked for

have classInt in Imports:, to not break other package checks

add vignettes 5: plotting sf objects and 6: miscellaneous; #324

add (default) color key to plot.sf if single map is plotted, contributed by @hughjonesd; #528

st_as_sfc can now read EWKT; #530

argument max.plot takes its default from options(sf_max.plot=n), if present; #516

plot.sf gets an arguments pal to specify a color palette function; #526

plot.sf gets arguments breaks and nbreaks; add support for classInt::classIntervals styles for finding class intervals (using breaks)

add st_as_sf methods for ppp, lpp and psp objects from spatstat.

allow for direct route to proj.4 ignoring GDAL (requiring liblwgeom); #509, #511

add print method for crs objects; #517

sf_extSoftVersion now reveals whether GDAL was linked to GEOS; #510

better check input of st_polygon; #514

add st_node, similar to rgeos::gNode

support for reading OFTInteger64List fields; #508

sparse geometric binary predicate lists now have a class, sgbp, and attributes region.id and predicate; #234, #524

prevent st_split from stopping the R session; #492

st_intersection, st_union and so on now also print a message when used directly on long/lat coordinates; #496

add rep method for sfc objects

comparing two crs objects now uses the GDAL function IsSame; #180

add st_collection_extract, which, given an object with geometries of type GEOMETRY or GEOMETRYCOLLECTION, returns an object consisting only of elements of the specified type; by Andy Teucher, #482

st_write exports GeoJSON with UTF-8 encoding on Windows; #444

move package methods from Imports: to Depends: ; #478

deal better with precision setting and propagation; #476

fix bug in st_layers in case layers have no geometry; #334

clarify argument envelope in st_voronoi; #474

change aggregate to make it return the same geometry as 'by', padding attributes with NA where needed; #453

fix compatibility problems introduced by tidyr 0.7-0 using rlang magic

convert path names to UTF-8 in st_read, st_write and st_layers; #471

st_sfc converts NULL values into empty geometries, and correctly identifies empty POINTs; #466, #463

st_write abbreviates column names if driver is ESRI Shapefile; #464

add of_largest_polygon argument to st_centroid, to get the centroid of the largest polygon; #450

fix use of st_relate as join predicate for st_join; #454

fix bug where st_intersects with empty second argument would crash; #458

produce better WKT; #463

fix bug in st_cast.sf; #461, #462

change st_read SRS assignment logic; corrects reading projected geojson with gdal 2.2.0; #449

st_intersection etc. on tbl now also return tbl; #448

[.sf preserves class, e.g. of tbl; #448

support and propagate all Proj.4 +units=xx length units; #446

allow for arith ops on empty sfc objects

have st_graticule return an empty graticule object when argument datum is NA;

export as_Spatial, to make it easer for packages to convert sfc objects without importing sf

st_distance gains a parameter by_element to obtain pairwise distances; #437

add the ability to aggregate using a simple feature by argument; #429

make the op argument to [.sf work

speed up st_coordinates for POINT geometries; #433

fix performance regression for st_bbox; #418

correct bug in st_union, st_difference and st_sym_difference introduced in 0.5-2; #431

inform gdal about the CRS always through the proj4string, never through the epsg; see #424

properly deal with kilometre units; #424 (fixed by Karl Dunkle Werner)

add st_is_within_distance, only to return a sparse index matrix; #419

have st_graticule work with world2 (0,360); #421, #422, fixed by Ben Best

st_graticule to return graticules in native crs; tidyverse/ggplot2#2200 (WIP)

st_graticule to support data in NA_crs_; tidyverse/ggplot2#2199

fix bug when joining an sf-tibble with a tibble; #414

read gdal StringList, RealList, and IntegerList fields into a list-column; #416

made ready for rwinlib/gdal2; #408

make [.sf for selections including NA values like x[c(1,NA,2)]; #403

add a [<- method for sfc objects; automatically replaces NULL with an empty geometry; #411

add st_point_on_surface() to return a point that is guaranteed to be on the surface (standard compliance)

read_sf now returns an sf-tibble, an object of class c("sf", "tbl_df", "tbl", "data.frame")

work around for dplyr::filter not dispatching geometry column subsetting to sf::[.sfc

allow units object as dist argument to st_buffer; these must be convertable to arc_degree for geographic, and to a length unit for non-geographic data; #399

prevent gdal from crashing when trying to st_transform an empty geometry; #398

add st_as_sfc method for bbox, returning the bbox polygon; #377

strip file name extension from default layer name in st_write; #392

have st_sf replace NULL values in an sfc list-column with the appropriate empty geometry; #372

allow setting ndiscr through ggplot2::coords_sf to improve graticule plotting in geom_sf; #396

add spatial indexes to most binary geometry operations; #394 and http://r-spatial.org/r/2017/06/22/spatial-index.html

drastically reduce memory footprint of st_intersection and similar; #394

support RSQLite 2.0 by providing an st_as_sfc method for list columns of class blob

drop dependency on dbplyr

better handle empty/NULL geometries in shapefiles; #351

add unite_.sf method

deprecate FUN argument to st_join; #376

improve graticule tic label placement in ggplot2; #375 and tidyverse/ggplot2#2119

improve configure logic to deal with libraries installed in custom locations; #335

fix bug where geom_sf wouldn't deal with Z and/or M geoms; #373

return more conveniently typed empty geoms; #372

fix subsetting with [ of sf using drop = TRUE, #370

in addition to m, allow rad units to st_segmentize

add example how to st_read GeoJSON from a string; #185

add separate_.sf method

add st_split to split geometries (only available if compiled against liblwgeom), #359

fix bug reading and writing dates (months 1 off): #358

[.sf and [.sfc now also select on i when i is an sfg object, and accept a geometric predicate function with optional arguments; #352

on reading through GDAL, empty (NULL) geometries no longer result in an error; on creation, they no longer automatically give a GEOMETRY object; #351

on plotting with ggplot2::geom_sf, empty geometries no longer break; grid functions return nullGrob() for them; #351

arith operations on empty geometries no longer break or give warnings; #351

have st_as_sf.data.frame by default break on NA values in coordinates; #342

have st_join accept further arguments, to be passed on to the join function (e.g. a pattern for st_relate)

have WKB reader throw an error on (some) malformed inputs, and check for buffer bounds

back-port do_union argument to dplyr <= 0.5.0, using lazyeval

all strings returned from OGR/GDAL now get encoding set to UTF-8, making them work on non-UTF-8 platforms; #5

$.crs now retrieves proj4string components, such as st_crs(4326)$datum in addition to epsg and proj4string

let st_geohash return geohash for (average) points (only when sf was linked to liblwgeom)

summarise.sf now always returns an sf object, also for global (non-grouped) summaries.

summarise.sf gains an argument do_union which determines whether to union the geometries for which a summary is given, or to st_combine them (not resolving boundaries); #331

rename argument union of aggregate.sf into do_union, for consistency with summarise; #331

add a nest_ method for sf objects

st_relate gets a pattern parameter, same as rgeos::gRelate; add examples to get rook and queen neighbour lists using this; #234

support for direct reading of spatialite and sqlite geometry wkb blobs

build proper support for cbind and rbind methods for sf, which work (as documented) when all arguments are of class sf; dplyr::bind_cols or st_sf(data.frame(sf, df)) work for binding data.frames to an sf object.

st_segmentize() and st_line_sample() now accept units arguments

document problem reading shapefiles from USB drives on OSX; #252

improve docs of st_is_valid and st_make_valid; #296

coercing sf to data.frame now works better; #298

st_line_sample gains argument sample to specify the points t.b. sampled; #299 #300 thanks to @joethorley

add compatibility to upcoming dplyr 0.6.0; #304 #42

write GDAL fields by name, not by number, fixing a KML problem #308

st_write gains arguments delete_layer and delete_dsn to allow overwrite capability #307 #274

write_sf defaults to delete_layer=TRUE, silently overwriting layers if they're already present

compatibility with GDAL 2.2beta0; #303; #309

replace st_write_db with a version that is fast for large datasets (#285), thanks to Josh London

take out more memory leaking examples in tests

the aggregate method for sf objects now assumes the by argument to be identical to that of stats::aggregate

st_wrap_dateline wraps (cuts up) geometries crossing the antimeridian, such that they no longer cross it.

restore 3.3.0 and c++11 requirement

st_read now respects time that is read as UTC

st_write now writes time always as UTC, since GDAL does not have a mechanism to define local timezones other than "unkown" or "local"

st_length now works for POINT and MULTIPOINT (returning 0); POLYGON and MULTIPOLYGON are converted to MULTILINESTRING before computing length, thus giving polygon perimeter (#268)

st_write now has update depend on driver; now, for databases, the default is TRUE, otherwise FALSE (it refers to update of the database, and not to overwriting the table in the database, this will by default not succeed); #274

st_read supports reading objects with multiple geometry columns #257 #255

support writing (exporting) objects with non-standard columns, such as units or POSIXlt #264

catch dependencies on GEOS 3.3.5 (hence no 0.4-0 CRAN binary for MacOSX) #260

have st_is_valid catch corrupt geometries too, returning NA in that case (requiring GEOS 3.5.0)

add st_make_valid, only available when sf was linked to liblwgeom

add st_coordinates method, returning coordinates matrix with indexes

remove unlist.sfg

add as.matrix.sfg; have as.matrix.sfg add indexes to coordinates

add st_bind_cols method

improve handling features that can't be projected

support uniform sampling over polygons on the sphere

add st_sample, for sampling points on multipoints, linestrings, or polygons

add c method for sfc objects

import and export magrittr::%>%

support ggplot'ing geometrycollections

drop C++11 requirement, allowing build for older R versions

add st_proj_info, modelled after rgdal::projInfo

overwriting datasets with st_write is no longer allowed; update=TRUE appends to them, permitted the driver supports appending.

st_write gains an argument, update, which when TRUE will try to append to existing datasets (#204)

added list of corresponding function for migration from sp, rgdal and rgeos to sf at https://github.com/edzer/sfr/wiki/migrating

remove deprecated st_list

rename st_makegrid to st_make_grid, and st_linemerge to st_line_merge

add NEWS.md file (#207)

faster conversion of data.frame into POINT sf object, using st_as_sf (Mike Sumner)

rbind method for sf objects now keeps coordinate reference system

add st_contains_properly spatial predicate

GEOS functions (geometry operations) now accept XYZ geometries (and ignore Z)

make prepared = TRUE the default for all geometry binary operations

add user interrupt checks in all GEOS geometry operations

make st_graticule do something useful for polar projections

make st_graticule return NA labels when labels are useless

add merge.sf methods to merge sf object and data.frame (#193)

add st_join for table joins based on (user-defined) spatial predicates

add dplyr-style non-spatial joins for sf objects (left_join, full_join etc.) (#193)

allow for multiple non-gathered variables (#196)

add missing meridian to st_graticule (#198)

add merge method (#193)

st_graticule for laea (#198)

allow st_buffer with feature-dependent buffer distance (#197)

have spread return an sf object (#196)

clarify overwrite = TRUE in write docs

fix st_as_sf.map (#194)

add prepared arg to spatial binary predicates, to speed up large intersections

add st_voronoi interface (requires that lib GEOS >= 3.5.0)

add st_as_sf methods for map objects (library maps)

add RStudio project file

have st_bbox return a bbox object which has an st_crs method

rename st_drop_zm into st_zm, for general more handling of Z and M

allow for 3D coordinates returned, when +proj=geocent (#172; #103)

fix NA_integer_ handling in shapefiles I/O (#184)

add and fix st_agr API, to set and get attribute-to-geometry relationships