WhiteboxTools

The main tool library is contained in the whitebox_tools (or whitebox_tools.exe on 
MS Windows) file. This is a command-line program that can be run from a terminal, i.e. 
command prompt. For details on usage, change the working directory (cd) to this folder 
and type the following at the command prompt:

./whitebox_tools --help

The following commands are recognized:
--cd, --wd       Changes the working directory; used in conjunction with --run flag.
-h, --help       Prints help information.
-l, --license    Prints the whitebox-tools license.
--listtools      Lists all available tools. Keywords may also be used, --listtools slope.
-r, --run        Runs a tool; used in conjuction with --wd flag; -r="LidarInfo".
--toolbox        Prints the toolbox associated with a tool; --toolbox=Slope.
--toolhelp       Prints the help associated with a tool; --toolhelp="LidarInfo".
--toolparameters Prints the parameters (in json form) for a specific tool; --toolparameters="LidarInfo".
-v               Verbose mode. Without this flag, tool outputs will not be printed.
--viewcode       Opens the source code of a tool in a web browser; --viewcode="LidarInfo".
--version        Prints the version information.

Example Usage:
>> ./whitebox-tools -r=lidar_info --cd="/path/to/data/" -i=input.las --vlr --geokeys


The WhiteboxTools library may also be called from Python automation scripts. The 
whitebox_tools.py script can be used as an easy way of interfacing with the various 
commands. See the user manual for more deails. To use this script, simply use the 
following import:

from whitebox_tools import WhiteboxTools

wbt = WhiteboxTools() 
wbt.work_dir = "/path/to/data/" # Sets the Whitebox working directory

wbt.d_inf_flow_accumulation("DEM.dep", "output.dep", log=True)


Additionally, included in this directory is the WhiteboxTools Runner, a simple Tkinter 
user-interface that allows users to run the WhiteboxTools tools, with convenience for 
specifying tool parameters. To run this interface, simply type:

python3 wb_runner.py

Or, if Python 3 is the default Python intepreter:

python wb_runner.py

At the command prompt (after cd'ing to this folder, which contains the script).

WhiteboxTools is distributed under a permissive MIT open-source license. See LICENSE.txt 
for more details.

******************
* Release Notes: *
******************

Version 1.4.0 (04-09-2020)
- Added the TimeInDaylight model tool for modelling the proportion of daytime that a location is not in shadow.
- Added the MapOffTerrainObjects tool.
- Added the FilterRasterFeaturesByArea tool.
- Added the LidarDigitalSurfaceModel tool.
- The D8 and FD8 flow pointer tools now output byte rasters.
- The Isobasins tool now optionally outputs an upstream/downstream connections table.
- The HorizonAngle tool has had significant performance improvements.
- Improvements to the RemoveOffTerrainObjects tool's performance.
- The Resample tool has been modified so that it does not require a 'destination' raster. Instead,
  it will create a new output raster either based on a user-specified target cell resolution or
  an optional base raster, much like the vector-to-raster conversion tools.
- Tools that input a z_factor conversion no longer override user input with geographic coordinates
  (see issue #113).
- The StreamLinkIdentifier tool now outputs a 32-bit integer format, increasing the maximum allowable 
  number of streams (see issue #110).
- Fixed a bug with cubic-convolution and bilinear resampling in the Mosaic tool (see issue #109).

Version 1.3.1 (23-07-2020)
- Added the HypsometricallyTintedHillshade tool to create hypsometric tinted hillshades.
- Added the MultidirectionalHillshade tool.
- Added the ability to read/write in the Esri BIL raster format.
- Added the LidarRooftopAnalysis tool.
- The MultiPartToSinglePart tool now handles MultiPoint vectors.
- Fixed a bug with the VoronoiDiagram to better handle MultiPoint vectors.
- Fixed an issue with writing compressed RGB GeoTIFFs.
- Fixed an issue reading LZW compressed GeoTIFFs.

Version 1.3.0 (07-06-2020)
- Tools will now output DEFLATE compressed GeoTIFFs when the --compress_rasters parameter is used.
- Added support for a newly developed compressed LiDAR data format, the ZLidar file. All tools
  that accepted LAS file inputs and produced LAS outputs can now use '*.zlidar' files as well. I 
  have also added the LasToZlidar and ZlidarToLas tools to perform conversions. While the ZLidar
  format does not yield compression rates quite as good as the popular LAZ file format, you can  
  expect ZLidar files to be between 20-30% of the size of the equivalent LAS file. A file  
  specification will be published in the near future to describe the open ZLidar data format.
- Added the AsciiToLas tool.
- Added the ContoursFromRaster tool for creating a vector contour coverage from a raster surface model (DEM).
- Added the ContoursFromPoints tool for creating a vector contour coverage from vector points.
- Added the UpdateNodataCells tool.
- Modified the Slope tool to optionally output in degrees, radians, or percent gradient.
- Modified the Mosaic tool, which now runs much faster with large numbers of input tiles.
- The vector-to-raster conversion tools now preserve input projections.
- Fixed a bug in the RasterToVectorPolygons tool.
- Fixed several bugs in the MergeTableWithCsv tool.
- Modified the FillMissingData tool to allow for the exclusion of edge-connected NoData cells from the operation.
  This is better for irregular shaped DEMs that have large areas of NoData surrounding the valid data.
- The LidarConstructVectorTin tool has been depreciated. The tool was not creating the proper output.
  Furthermore, since the number of points in the average LiDAR tile is usually many million, this tool
  would usually produce Shapefiles that exceed the maximum allowable number of shape geometries. If 
  a vector TIN is required for a LiDAR point set, users should convert the file to a Shapefile and then
  use the ConstructVectorTin tool instead. And of course, if you are interested in a raster TIN from a 
  LiDAR file, use the LidarTinGridding tool instead. 
- FlattenLakes now handles multipart lake polygons.

Version 1.2.0 (21-02-2020)
- Added the RasterToVectorPolygons tool, which now completes the raster-vector conversion tool set.
- Added the MultiscaleElevationPercentile tool.
- Added the AttributeCorrelationNeighbourhoodAnalysis tool.
- Added the RadialBasisFunctionInterpolation tool, which includes a thin-plate spline mode.
- Added the RasterPerimeter tool to measure the perimeter of raster polygons.
- Added the MDInfFlowAccumulation tool to perform the MD-infinity flow accumulation of Seibert 
  and McGlynn (2007).
- Added the InsertDams tool, which can be used to insert impoundment features at a set of points
  of interest into a DEM. This tool can be used in combination with the ImpoundmentSizeIndex tool 
  to create artificial reservoirs/depressions.
- Added the HeightAboveGround tool, to normalize a LiDAR point cloud. Each point's z-value is
  converted to the height above the nearest ground-classified point.
- Modified the LidarRbfInterpolation tool to improve efficiency.
- Fixed an issue with how floating point attributes were written in Shapefile attribute tables.
- Updated the LidarSegmentation tool, which now used RANSAC to fit planar models to points.
- Fixed an issue with the Reclass and ReclassFromFile tool that caused striping.
- The Relcass and ReclassFromFile tools now take 'min' and 'max' in the reclass string.
- The watershed tool now accepts either a set of vector points or a raster for the pour points 
  file. If a raster is specified, all non-zero, non-NoData valued cells will be considered 
  outlet cells and the watershed labels will be assigned based on these values.
- The D8 and D-infinity flow accumulation tools now take either an input DEM or a flow pointer raster 
  as inputs.

Version 1.1.0 (09-12-2019)
- Added the BreachDepressionsLeastCost tool, which performs a modified form of the Lindsay 
  and Dhun (2015) impact minimizing breaching algorithm. This modified algorithm is very 
  efficient and can provide an excellent method for creating depressionless DEMs from large 
  DEMs, including those derived from LiDAR. It is particularly well suited to breaching 
  through road embankments, approximately the pathway of culverts.
- The FillDepressions tool algorithm has been completely re-developed. The new algorithm is
  significantly faster than the previous method, which was based on the Wang and Lui method.
  For legacy reasons, the previous tool has been retained and renamed FillDepressonsWangAndLui.
  Notice that this new method also incorporates significantly improved flat area correction
  that maintains general flowpaths of filled areas.
- The Sink and DepthInSink tools have been updated to use the new depression filling algorithm.
- Added the ClassifyBuildingsInLidar tool to reclassify LiDAR points within a LAS file
  to the building class value (6) that are located within one or more building footprint
  contained in an input polygon vector file. 
- Added the NaturalNeighbourInterpolation tool for performing Sibson's (1981) interpolation
  method on input point data.
- Added the UpslopeDepressionStorage tool to estimate the average upslope depression 
  storage capacity (DSC).
- Added the LidarRbfInterpolation tool for performing a radial basis function (RBF) interpolation
  of LiDAR data sets.
- The WhiteboxTools Runner user interface has been significantly improved (many thanks to 
  Rachel Broders for these contributions).
- Fixed a bug in which the photometric interpretation was not being set by certain raster
  decoders, including the SAGA encoder. This was causing an error when outputting GeoTIFF 
  files.
- Updated the ConstructVectorTIN and TINGridding tools to include a maximum triangle edge 
  length to help avoid the creation of spurious long and narrow triangles in convex regions 
  along the data boundaries.
- Added the ImageCorrelationNeighbourhoodAnalysis tool for performing correlation analysis
  between two input rasters within roving search windows. The tool can be used to perform
  Pearson's r, Spearman's Rho, or Kendall's Tau-b correlations.

Version 1.0.2 (01-11-2019)
- Added the BurnStreamsAtRoads tool.
- Added a two-sample K-S test (TwoSampleKsTest) for comparing the distributions of two rasters.
- Added a Wilcoxon Signed-Rank test (WilcoxonSignedRankTest) for comparing two rasters.
- Added a paired-samples Student's t-test (PairedSampleTTest) for comparing two rasters.
- Added the inverse hyperbolic trig functions, i.e. the Arcosh, Arsinh, and Artanh tools.
- Renamed the LeeFilter to the LeeSigmaFilter.
- Renamed the RelativeStreamPowerIndex tool to StreamPowerIndex, to be more in-line with
  other software.
- Fixed another bug related to the handling of Boolean tool parameters.

Version 1.0.1 (20-10-2019)
- Boolean type tool parameters previously worked simply by the presence of the parameter flag.
  This was causing problems with some WBT front-ends, particularly QGIS, where the parameters
  were being provided to WBT as --flag=False. In this case, because the flag was present, it 
  was assumed to be True. All tools that have boolean parameters have been updated to handle
  the case of --flag=False. This is a widespread modification that should fix the unexpected
  behaviour of many tools in certain front-ends.
- Fixed a minor bug with the VectorPolygonToRaster tool.
- Fixed a bug in the DownstreamDistanceToStream tool.

Version 1.0.0 (29-09-2019)
- Added support for reading and writing the BigTIFF format. This has resulted in numerous changes
  throughout the codebase as a result of significant modification of ByteOrderReader and addition
  of ByteOrderWriter. This change has touched almost every one of the raster format 
  encoders/decoders.
- Performance improvements have been made to the FlattenLakes (hydro-flattening) tool.
- Fixed a bug preventing the SplitColourComposite tool from reading the '--input' flag correctly.
- The ClipLidarToPolygon now issues a warning if the output LAS file does not contain any points
  within the clipped region and does not output a file. Also, the LAS reader no longer panics 
  when it encounters a file with no points. Now it reads the header file, issues a warning, and 
  carries on, allowing the tools to handle the case of no points.
- ImageRegression can now optionally output a scatterplot. The scatterplot is based on a random 
  sample of a user-defined size.
- Added the CleanVector tool.
- ExtractRasterStatistics has been renamed ZonalStatistics to be more inline with other GIS, 
  including ArcGIS and QGIS.
- Added the median as a statistic that ZonalStatistics provides.
- Fixed a bug in the VectorPolygonsToRaster tool that sometimes mishandled polygon holes.
- Added the FilterLidarClasses tool to filter out points of user-specified classes.
- Added the LidarRansacPlanes tool to identify points belonging to planar surfaces. This tool
  uses the RANSAC method, which is a robust modelling method that handles the presence of 
  numerous outlier points.
- The ClipLidarToPolygon tool has been parallelized.
- The LasToAscii and AsciiToLas tools have been updated to handle RGB colour data for points.
- Added the CsvPointsToVector tool to convert a CSV text table into a shapefile of vector points. 
  The table must contain x and y coordinate fields.
- The FeaturePreservingDenoise was renamed to FeaturePreservingSmoothing. The DrainagePreservingSmoothing
  tool was removed. Use FeaturePreservingSmoothing instead.
- Added the ability to output the average number of point returns per pulse in the LidarPointStats tool.
- LidarTinGridding, LidarIdwIntarpolation, and LidarNearestNeighbourGridding now can interpolate the 
  return number, number of returns, and RGB colour data associated with points in a LAS file.
- Added the ModifyNoDataValue tool to change the NoData value in a raster. It updates the value in 
  the raster header and then modifies each grid cell in the raster containing the old NoData value
  to the new value. This operation overwrites the existing raster.
- Fixed an issue with GeoTIFF NoData values that impacted many tools. NoData values were not interpreted
  correctly when they were very large positive or negative values (near the min/max of an f32).

Version 0.16.0 (24-05-2019)
- Added the MergeLineSegments and SphericalStdDevOfNormals tools.
- Fixed a bug with reading LAS files with point records with extra bytes. Previously, the LAS decoder
  assumed the Point Record Length matched that of the LAS specifications (with the variable of the 
  optional intensity and user data). Some LAS files in the wild (particularly those created using 
  LASTools and of LAS version 1.2) have larger Point Record Lengths, which presumably carry extra 
  bytes of information. These extra byes are ignored, but they no longer throw off the decoding.
- Fixed a bug with writing Big-Ending GeoTIFF files. The 'MM' file header was not correct previously.
- Significantly reduced the memory requirements of the StochasticDepressionAnalysis tool. The tool 
  may be somewhat slower as a result, but it should be applicable to larger DEMs than was previously
  possible.
- Fixed bugs with the Union and SplitWithLines tools. 
- WhiteboxTools can now read and write Shapefiles of MultiPointZ, PolyLineZ, and PolygonZ ShapeTypes 
  missing the optional 'M' values (i.e. measures).
- SelectTilesByPolygon and LidarTileFootprint are now compatible with LAZ file inputs. Both of these 
  tools only rely on information in the input LiDAR file's header, which is the same for a LAZ file 
  as a LAS file.
- Fixed a bug with writing Saga GIS files (*.sdat) that inverted rasters.

Version 0.15.0 (03-03-2019)
- The following tools were added to the project:
  BoundaryShapeComplexity
  NarrownessIndex
  ShapeComplexityIndexRaster

- Fixed a bug with the PanchromaticSharpening tool.
- Previously, if a LAS v1.4 file were input to a tool, the output LAS file, which is currently
  always in LAS v1.3 format, would not correctly translate the 64-bit information (point 
  return, number of returns, classification) into 32-bit format. I have added the 
  get_32bit_from_64bit function to handle this translation more gracefully; albeit it is
  still a lossy translation where returns greater than 5 are ignored and classification 
  values greater than 31 are lost. 
- Added a maximum triangle edge length parameter to the LidarTinGridding tool to allow 
  for the exclusion of large-area triangles (i.e. low point density) from the gridding.
- The NormalizedDifferenceVegetationIndex tool has been renamed to NormalizedDifferenceIndex 
  to indicate the more general nature of this tool (i.e. NDVI, NDWI, OSAVI, etc.).
- Significant changes have been made to the BreachDepressions tool to make it more in-line
  with the behaviour of the GoSpatial algorithm described in the original Lindsay (2016)
  paper. These changes include: 1) the inclusion of an optional parameter to fill single-cell
  pits prior to breaching, 2) the addition of a --flat_increment parameter, which overrides
  the automatically derived value assigned to flat areas along breach channels (or filled 
  depressions), and 3) the tool now performs a fast post-breach filling operation, when
  run in constrained-breaching mode (i.e. when the user specifies values for either 
  --max_depth or --max_length, placing constraints on the allowable breach channel size).

Version 0.14.1 (10-02-2019)
- This release largely focuses on bug-fixes rather than feature additions. However, the
  following tools were added to the library:
  RasterArea
  
- Fixed a bug with the MultiscaleTopographicPositionImage tool that prevented proper output
  for files in GeoTIFF format. 
- Several other tool-specific bug fixes.

Version 0.14.0 (27-01-2019)
- The release largely focuses on bug-fixes rather than adding new features. The
 following tools were added to the project:
    CircularVarianceOfAspect
    EdgeDensity
    SurfaceAreaRatio

- Fixed a bug that resulted in rasters with projected coordinate systems being
  interpreted as geographic coordinates, thereby messing up the calculation of 
  inter-cell distances for tools like slope, aspect, curvature, etc.
- Fixed a bug with several of the math tools; output files took their data type
  from the input file. In some cases, this does not work well because the input
  is integer and the output must be floating point data.


Version 0.13.0 (08-01-2019)
- The release largely focusses on bug-fixes rather than adding new features. The
 following tools were added to the project:
    MosaicWithFeathering
- Support was added for GeoTIFF MODELTRANSFORMATIONTAG (Tag 33920).
- Support was added for reading GeoTIFFs that have coordinate transformations 
  defined by multiple tiepoints contained with the ModelTiepointTag (Tag 33922).
  These rasters have their raster-to-model transform defined by a 2D polynomial
  regression of the 3rd order.
- The initialize_using_file function in the abstract Raster model now transfers
  information contained in an input GeoTIFF's ModelTiePoint, ModelPixelScale,
  ModelTransform, GeoKeyDirectory, GeoDoubleParms, and GeoAsciiParams tags to
  the output raster. This means that if a GeoTIFF file is input to a Whitebox 
  tool, and the output raster is specified to be of GeoTIFF format as well,
  all of the coordinate information contain in the input raster will now be
  contained in the output raster.
- The FeaturePreservingDenoise and DrainagePreservingSmoothing tools, both of
  which are used for DEM generalization, now represent surface normal vectors 
  using 32-bit floats instead of the original double-precision values. This 
  does not alter the results of these tools significantly, but does reduce the 
  memory requirements and run-times of these tools substantially.
- The LidarKappa tool now outputs a raster displaying the spatial distribution 
  of the overall accuracy per grid cell (i.e. percent agreement).
- Fixed a bug with the RasterStreamsToVector tool that resulted in overlapping
  traced streams.
- The D8FlowAccumulation tool has been modifed to use a fixed flow-width to 
  calculate specific contributing area, equal to the average grid cell resolution. 
  The tool previously used a variable flow-width for SCA calculations, however,
  1. this differs from the constant value used in Whitebox GAT, and 2. a 
  variable flow-width means that flow accumulation values do not increase 
  continuously in a downstream direction. This last issue was causing problems
  with applications involving stream network extraction. This change does not
  affect the 'cells' nor 'catchment area' outputs of the tool.
- Fixed a bug with the GeoTIFF NoData tag.
- Fixed a bug with the SetNodataValue tool.


Version 0.12.0 (22-11-2018)
- The following tools were added to the project:
    BlockMaximumGridding
    BlockMinimumGridding
    Clip
    Dissolve
    Erase
    JoinTables
    Intersect
    LasToShapefile
    LidarClassifySubset
    LinearityIndex
    LineIntersections
    LongestFlowpath
    MergeTableWithCsv
    MergeVectors
    NearestNeighbourGridding
    PatchOrientation
    Polygonize
    RasterToVectorLines
    SplitWithLines
    SymmetricalDifference
    Union
    VoronoiDiagram

- Modified the algorithm used by the CostDistance tool from an iterative method of
  finding the minimum cost surface to one that uses a priority-flood approach. This
  is far more efficient. Also, there was a bug in the original code that was the 
  result of a mis-match between the neighbouring cell distances and the back-link 
  direction. In some cases this resulted in an infinite loop, which is now resolved.
- Improvements have been made to the WhiteboxTools GeoTIFF reader. A bug has been
  fixed that prevented tile-oriented (in contrast to the more common strip-oriented)
  TIFF files from being read properly. Support has been added for reading rasters
  that have been compressed using the DEFLATE algorithm. Lastly, the WhiteboxTools
  GeoTIFF reader now supports sparse rasters, as implemented by GDAL's GeoTIFF driver.
- An issue in the SAGA raster format reader has been fixed.


Version 0.11.0 (01-10-2018)
- This release is marked by the addition of several vector data processing capabilities. 
  Most notably, this includes support for TINing and TIN based gridding (vector and 
  LiDAR), as well as several vector patch shape indicies. The following tools were 
  added to the project:
    AddPointCoordinatesToTable
    CentroidVector
    CompactnessRatio
    ConstructVectorTIN
    ElongationRatio
    ExtendVectorLines
    HoleProportion
    LayerFootprint
    LidarConstructVectorTIN
    LidarTINGridding
    LinesToPolygons
    Medoid
    MinimumBoundingCircle
    MinimumBoundingEnvelope
    MultiPartToSinglePart
    PerimeterAreaRatio
    PolygonArea
    PolygonPerimeter
    RasterStreamsToVector
    RasterToVectorPoints
    RelatedCircumscribingCircle
    RemovePolygonHoles
    ShapeComplexityIndex
    SinglePartToMultiPart
    SmoothVectors
    SumOverlay
    TINGridding

- Added a minimum number of neighbours criteria in the neighbourhood search of the
  LidarGroundPointFilter tool. In this way, if the fixed-radius search yields fewer
  neighbours than this minimum neighbours threshold, a second kNN search is carried
  out to identify the k nearest neighbours. This can be preferable for cases where
  the point density varies significantly in the data set, e.g. in the case of 
  terrestrial LiDAR point clouds.
- The MinimumBoundingBox tool has been modified to take an optional minimization 
  criteria, including minimum box area, length, width, or perimeter.
- Fixed: Bug that resulted in a 0.5 m offset in the positioning of interpolated grids.
- Fixed: Viewshed tool now emits an intelligible error when the viewing station does 
  not overlap with the DEM.


Version 0.10.0 (16-09-2018)
- The following tools were added to the project:
    CreateHexagonalVectorGrid
    CreateRectangularVectorGrid
    DrainagePreservingSmoothing
    EliminateCoincidentPoints
    ExtractNodes
    HighPassMedianFilter
    LasToMultipointShapefile
    LidarHexBinning and VectorHexBinning
    LidarTileFootprint
    MaxDifferenceFromMean
    MinimumBoundingBox
    MinimumConvexHull
    PolygonLongAxis and PolygonShortAxis
    PolygonsToLines
    ReinitializeAttributeTable

- Refactoring of some data related to Point2D, and common algorithms (e.g. 
  point-in-poly, convex hull).
- Added unit tests to BoundingBox, point_in_poly, convex_hull, and elsewhere.
- Fixed a bug in LiDAR join related to tiles with fewer than two points. LAS files
  now issue a warning upon saving when they contain less than two points.
- The default callback can now be modified in whitebox_tools.py, such that
  a single custom callback can be used without having to specify it for each
  tool function call.
- Added initial support for getting projection ESPG and WKT info from LAS files 
  and GeoTiff data. This is the start of a more fullsome approach to handling
  spatial reference system information in the library.
- Fixed a bug in saving Shapefile m and z data.
- Fixed a bug that wouldn't allow the LidarIdwInterpolation and 
  LidarNearestNeighbourGridding tool to interpolate point classification data.
- LidarGroundPointFilter now has the ability to output a classified LAS file rather 
  than merely filtering non-ground points. Ground points are assigned classification
  values of 2 while non-ground points are classified as 1.
- Updated the LidarKappaIndex tool to use a NN-search to find matching points between
  the compared point clouds.
- Modified the FixedRadiusSearch structure to use 64-bit floats for storing coordinates.
  This impacts performance efficiency but is needed for the fine precision of 
  positional information found in terrestrial LiDAR data. FixedRadiusSearch structures
  have also had approximate kNN search methods added.


Version 0.9.0 (22-08-2018)
- Added the following tools:
    ExtractRasterValuesAtPoints
    FindLowestOrHighestPoints
    LidarThinHighDensity
    SelectTilesByPolygon
    StandardDeviationOfSlope
    
- Support has been added for writing Shapefile vector data.
- The SnapPourPoints and JensonSnapPourPoints tools have been modified to accept
  vector inputs and to produce vector outputs. This is more consistent with 
  the Watershed tool, which requires vector pour point data inputs.


Version 0.8.0 (30-05-2018)
- Added the following tools:
    CornerDetection
    FastAlmostGaussianFilter
    GaussianContrastStretch
    IdwInterpolation
    ImpoundmentIndex
    LidarThin
    StochasticDepressionAnalysis
    UnsharpMasking
    WeightedOverlay
- Modified some filters to take RGB inputs by operating on the intensity value. 
  These include AdaptiveFilter, BilateralFilter, ConservativeSmoothingFilter, 
  DiffOfGaussianFilter, EdgePreservingMeanFilter, EmbossFilter, GaussianFilter, 
  HighPassFilter, KNearestMeanFilter, LaplacianFilter, LaplacianOfGaussianFilter, 
  LeeFilter, MaximumFilter, MeanFilter, MedianFilter, MinimumFilter, OlympicFilter, 
  PrewittFilter, RangeFilter, RobertsCrossFilter, ScharrFilter, SobelFilter, and
  UserDefinedWeightsFilter.
- Fixed a bug with reading/writing Whitebox Raster files containing RGB data.
- Modified the MajorityFilter tool to improve efficiency substantially. Also fixed
  a bug in it and the DiversityFilter tools.


Version 0.7.0 (01-05-2018)
- Added the following tools:
    AttributeCorrelation
    ChangeVectorAnalysis
    ClassifyOverlapPoints
    ClipLidarToPolygon
    ClipRasterToPolygon
    CorrectVignetting
    ErasePolygonFromLidar
    ExportTableToCsv
    RaiseWalls
    TrendSurface
    TrendSurfaceVectorPoints
    UnnestBasins
    UserDefinedWeightsFilter
- Updated TraceDownslopeFlowpaths to take vector seed point inputs.

Version 0.6.0 (22-04-2018)
- Added the ability to read Shapefile attribute data (.dbf files).
- Added support to read LZW compressed GeoTIFFs, at least for simple
  single-band files. The decoder can also handle the use of a horizontal
  predictor (TIFF Tag 317).
- The following tools have been added in this release:
    AttributeHistogram
    AttributeScattergram
    CountIf
    ListUniqueValues
    VectorLinesToRaster
    VectorPointsToRaster
    VectorPolygonsToRaster

Version 0.5.1 (11-04-2018)
- This minor-point release fixes a far-reaching regression bug caused by a 
  change to the Raster class in the previous release. The change was 
  needed for the in-place operator tools added in the last update. This
  modification however affected the proper running of several other tools
  in the library, particularly those in the Math and Stats toolbox. The
  issue has now been resolved. 
- The VisibilityIndex tool has been added to the library. This is one 
  of the most computationally intensive tools in the library and should
  really only be used in a high 
- Modified tools with integer parameter inputs to parse strings 
  representations of floating point numbers. Previously, feeding
  a tool 'filter_size=3.0' would cause a fatal error.
- Changed Raster so that when a filename with no extension is provided
  as a parameter input to a tool, it defaults to a GeoTIFF.
- Added a new section to the User Manual titled, 'An Example WhiteboxTools 
  Python Project'. This addition provides a demonstration of how to
  set-up a WhiteboxTools Python project, including the file structure
  needed to import the library.

Version 0.5.0 (04-04-2018)

- The following tools have been added:
    EdgePreservingMeanFilter
    ElevationAboveStreamEuclidean
    ErasePolygonFromRaster
    FillBurn
    FlattenLakes
    ImageStackProfile
    InPlaceAdd
    InPlaceDivide
    InPlaceMultiply
    InPlaceSubtract
    MaxAnisotropyDevSignature
    PrincipalComponentAnalysis
    RasterizeStreams
    
- Updated tools so that the reporting of elapsed time respects verbose mode.
- Raster now allows for opening an existing raster in write mode ('w'), needed 
  for the in-place math operators (e.g. InPlaceAdd).
- Added update_display_min_max function to Raster.
- Output tables now highlight rows when the mouse hovers.

Version 0.4.0 (04-03-2018)

- This release has erognomic improvements for Python scripting with Whitebox. Tools can be called 
  in Python like this:

  wt = WhiteboxTools()
  wt.slope(‘DEM.dep’, ‘slope.dep’)
  
- There is a convenience method in whitebox_tools.py for each tool in the WhiteboxTools binary 
  executable. This makes it far easier to call tools from a Python script. See the User Manual
  for details.
- Significant improvements and revisions have been made to the User Manual, and in particular 
  the section on Python based scripting with WhiteboxTools.
- The following tools have been added to the library:
    LidarColourize
    LidarPointStats
    LidarRemoveDuplicates
    LongProfile
    LongProfileFromPoints
    MaxElevDevSignature
    MultiscaleRoughness
    MultiscaleRoughnessSignature
    PrintGeoTiffTags
    Profile
- Updated Watershed and Viewshed tools to take vector point inputs.
- PennockLandformClass tool modified to have int8 output data type. Also fixed a bug in the input
  parameters.

Version 0.3.1 (15-02-2018)

- No new tools have been added to this release. Instead the focus was on improving and enhancing
  LAS file support and fixing a numbe of bugs. These include the following:
- Support has been added in the LAS file reader for handling Point Record Formats 4-11 in the 
  LAS 1.4 specificiations. This includes enhanced support for 64-bit LAS files. This change 
  resulted in cascading changes throughout the LiDAR infrastructure and LiDAR tools. Future 
  work will focus on writing LAS files in 1.4 format, instead of the current 1.3 format that is
  saved.
- The LidarIdwInterpolation, LidarNearestNeighbourGridding, and LidarPointDensity tools have each
  been modified to enhance the granularity of parallelism when operating in multi-file mode. This 
  has resulted in large improvements in performance when interpolating entire directories of 
  LAS files.
- The LasHeader object now has the ability to read a LAS header directly. This allows 
  interrogation of a LAS file without the need to create a full LAS object. This was useful 
  for identifying neighbouring tiles during interpolation, such that a buffer of points 
  from adjacent tiles can be used, thereby minimizing interpolation edge effects.
- There was a bug with the WhiteboxTools Runner that had issue with the use of a forward-slash (/) 
  in file paths on Windows. These have been fixed now. I also fixed every tool such that the use
  of a forward slash for file paths on Windows won't result in an additional working directory 
  being appended to file names. This one resulted in many files being slightly modified.
- Added the ability to select the working directory in WhiteboxTools Runner. This is a useful
  feature because some of the LiDAR tools now allow for no specified input/output files, in 
  which case they operate on all of the LAS files contained within the working directory.

Version 0.3 (07-02-2018)

- Added the following tools:
    MaxAnisotropyDev
    HysometricAnalysis
    SlopeVsElevationPlot
    LidarRemoveOutliers

- Added initial support for reading Shapefile geometries. This is still a proof-of-concept
  and no tools as of yet use Shapefile inputs. 
- Added functionality to create beautiful and interactive line graph and scattergram 
  outputs for tools.
- LiDAR interpolation tools now have the option to interpolate all LAS files within the 
  working directory when an input file name is not specified.
- Added first draft of a pdf user manual for WhiteboxTools.

Version 0.2 (12-01-2018)

- Added the following tools:
    KSTestForNormality
    RadomSample
    Mosaic
    Resample
    RadiusOfGyration
    KMeansClustering
    ModifiedKMeansClustering
    D8MassFlux
    DInfMassFlux
    RasterHistogram
    LidarHistogram
    CrossTabulation
    ImageAutocorrelation
    ExtractRasterStatistics
    AggregateRaster
    Viewshed

- Fixed several bugs including one affecting the reading of LAS files.

- Numerous enhancements