= GDAL/OGR 2.4.2 Release Notes =

The 2.4.2 release is a bug fix release.

== Build ==

 * Fix build --with-curl --without-threads (#1386)
 * Fix build on netBSD 8
 * Fix warnings with GCC 9
 * Add support for Poppler 0.75.0 (#1388), 0.76.0

== Port ==

 * /vsitar/: handle .tar file header with space padding instead of 0 for file size (#1396)
 * /vsicurl/: allow 'Connection timed out' CURL errors as candidate for HTTP retry
 * /vsicurl/: GetFileSize(): when HEAD request does not return Content-Length header, retry with GET
 * /vsicurl/: automatically detect signed URLs where host ends with a port number; also detect signed URLs as created with the AWS4-HMAC-SHA256 method (#1456)
 * /vsis3/: for a long living file handle, refresh credentials coming from EC2/AIM (#1593)

== GDAL algorithms ==

 * GDALCreateReprojectionTransformerEx(): do not emit error if reverse transformation fails, and fix crash when trying to use null reverse transformation
 * Warper: fix GDAL 2.3 regression in a situation with source nodata value, multiple bands and nearest resampling where the logic to detect which source pixels are nodata was inverted (#1656)
 * Contour generator: fix SegmentMerger list iterator skipping and out of bounds error. (#1670)
 * Rasterize: fix crash when working buffer is larger than 2GB (fix also gvBurnPoint) (#1338)

== GDAL core ==

 * GDALInvGeoTransform(): make it work with scale and rotation/skew coefficients of small absolute value (#1615)
 * GDALCopyWholeRasterGetSwathSize(): fix potential int overflows for big values of GDAL_SWATH_SIZE or GDAL_CACHEMAX
 * PAM: preserve existing metadata when setting new one (#1430)

== GDAL utliities ==

 * gdal_calc.py: Fixed NaN-streaking in output images when the --allBands option is given to tiled images, and removed redundant calculation of nXValid.
 * gdal_polygonize.py: fix outputing to geojson without explicit -f switch (#1533)
 * gdal_contour: remove explicit width/precision=12/3 of the elev field (#1487)

== GDAL drivers ==

AIGRID / AVCBin driver:
 * fix filename case adjustment that failed on /vsi filesystems (#1385)

BAG driver:
 * fix potential nullptr deref on corrupted file

ENVI driver:
 * add read support for reading GCPs (#1528), and fix off-by-one offset on line,pixel on reading GCP

GTiff driver:
 * make WEBP_LEVEL to be honored in Create() mode (#1594)
 * PushMetadataToPam(): early exit when PAM is disabled, to avoid error messages
 * do not generate a TIFFTAG_GDAL_METADATA with color interpretation information for JPEG YCbCr compression
 * Internal libtiff: TIFFWriteEncodedStrip/TIFFWriteEncodedTile: fix rewriting of LZW-compressed data (#1439)

GXF driver:
 * avoid closing the file pointer before being sure this is a GXF driver, otherwise this can prevent the opening of some raw format files (#1521)

HDF5 driver:
 * fix handling of attributes of type SCHAR, UCHAR, USHORT and UINT (https://github.com/mapbox/rasterio/issues/1663)
 * detect nodata from netCDF _FillValue; add more strict checks for accepting datasets for GCP, and handle nodata in GCP too (#1451)

ISIS3 driver:
 * fix parsing of lists in JSon metadata, and quote string items when writing lists when needed (#1510)

KEA driver:
 * return error when deleting metadata item rather than crashing (#1681)

MRF driver:
 * prevent integer overflow

MrSID driver:
 * fix potential crash when a zoom level cannot be opened

netCDF driver:
 * avoid inappropriate shift by -360 when attribute axis=X is set (#1440)

NITF driver:
 * fix parsing of SENSRB TRE (#1520)

PDF driver:
 * avoid possible assertion in PDFium backend on corrupted files

PDS3 driver:
 * add support for ENCODING_TYPE=DCT_DECOMPRESSED (#1457)

RS2 driver:
 * add half-pixel shift to reported GCP line and column numbers (#1666)

VRT driver:
 * Python pixel functions: also probe libpython3.Xm.so.1.0 (#1660)

WMS driver:
 * use proper JSon parsing for ESRI MapServer document (#1416)

XYZ driver:
 * fix regression regarding header lines that are not X,Y,Z (#1472)

== OGR core ==

 * segmentize(): fix 2.4.1 regression when 2 points are really close compared to the segmentizatin distance (#1414). Also handle the M dimension
 * RawDataset: use generic RasterIO() implementation when non-nearest resampling is asked (#1301)

== OGR utilities ==

 * ogrmerge.py: add shared='1' to speed-up -single mode with many layers

== OGR drivers ==

EEDA driver:
 * Switch to v1alpha API

ElasticSearch driver:
 * set 'application/json' in RunRequest() with POST (#1628)
 * GeoJSON type field should be mapped as text in ES>=5
 * Fix _mapping url

FileGDB/OpenFileGDB:
 * be robust when winding order of outer ring is incorrect (#1369)

GeoJSON driver:
 * fix recognizing some documents with members sorted alphabetically (#1537)
 * avoid SetFeature() to repeat first feature when looping over features (#1687)

GeoJSONSeq driver:
 * be more robust to invalid objects, and fixes performance issue on corrupted files. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13770.

GML driver:
 * GML/WFS: add minimum support for 'hexBinary' type (as string) (#1375)

GMLAS driver:
 * avoid null pointer dereference on some schemas
 * do not use space as separator for schema filename in XSD open option (#1452)

GMT:
 * use file extension based detection to accept files without header (#1461)

GPKG driver:
 * change default value of OGR_GPKG_FOREIGN_KEY_CHECK to NO, so as to avoid issues in downstream software
 * insert more accurate spatial extent in gpkg_contents
 * fix memory leak in case of corrupted database. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14683.
 * set sqlite3_busy_timeout, handle SQLITE_BUSY during tile read (#1370)

PDS driver:
 * fix heap-buffer-overflow in error code path. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14512.

PLScenes driver:
 * plscenesconf.json: add missing fields for PSOrthoTile

PostgreSQL driver:
 * do not attempt to create VARCHAR(n) columns with n >= 10485760 (#1508)

Shapefile driver:
 * better deal with empty .shp+.shx and SHAPE_RESTORE_SHX (#1525)
 * launder layer name to get Windows compatible filename
 * DeleteLayer(): make it delete .cpg, .sbn, .sbx, .qpj and other sidecar files (#1405)

WaSP driver:
 * on creation, make sure the layer geometry type set on the feature definition is wkbLineString25D

WFS3 driver:
 * handle paging wth missing type for rel:next, and better deal with user:pwd in URL
 * use 'id' attribute of collection items, if 'name' not available