LIS Tools

LIS Tools - a set of versatile tools

This package provides general tools for grid and point cloud processing, including transformation, attribute management, clipping, and subset extraction based on attribute values.


Tool: Apply Shift Grids to Point Cloud

Features
• application of shift grids to the x,y,z coordinates of a point cloud
Application
• point cloud georeferencing
• height conversion from ellipsoidal to orthometric heights

Tool: Apply Transformation Matrix

Features
• transformation of point clouds / 3D shapefiles by a given 4x4 transformation matrix
• application of the inverse of the transformation matrix
Application
• point cloud registration / transformation

Tool: Attach Grid Values to Point Cloud

Features
• attachment of values from grid datasets as attribute(s) to each point
Application
• attachment of additional, raster-based information to a point cloud

Tool: Attach Point Index as Attribute

Features
• attachment of the index of each point in the point cloud as attribute
Application
• analysis and storage of the sorting of the points within a point cloud file

Tool: Bulldozing [interactive]

Features
• removal of objects from a grid dataset by user interaction
Application
• removal of objects, e.g. buildings, from DEM datasets

Tool: Clip Point Cloud with Extent

Features
• extraction of a point cloud subset
• clipping area is defined by either the extent of a shapes layer or by coordinates
• several options how to handle points lying on the border of the clipping extent
Application
• extraction of spatial subsets from a point cloud dataset
• removal of tile overlaps in seamless data processing workflows

Tool: Clip Point Cloud(s) [interactive]

Features
• extraction of subsets from one or several point cloud datasets
• area-of-interest is defined interactively by either dragging a box or by digitizing a polygon
Application
• extraction of spatial subsets from a point cloud dataset

Tool: Clip Point Cloud(s) with Shapes

Features
• extraction of subsets from one or several point cloud datasets
• area-of-interest is defined by either the extent or the polygons of a shapesfile
• optionally only the selected polygons are processed
Application
• extraction of spatial subsets from a point cloud dataset

Tool: Close Gaps by Horizontal Plane

Features
• closing of NoData gaps in a grids dataset by a horizontal plane
• the elevation of the plane is determined from the boundary cells of the NoData gap
• optionally an offset can be applied to the plane
Application
• gap filling in DTM datasets (removed buildings or water bodies)

Tool: Demolition [interactive]

Features
• removal of objects from a grid dataset by user interaction
Application
• removal of objects, e.g. buildings, from DEM datasets

Tool: Drop Point Cloud Attributes

Features
• deletion of attributes from a point cloud
Application
• removal of attributes, e.g., temporary processing results

Tool: Extract Subset from Point Cloud

Features
• extraction of a subset of a point cloud based on attribute values
• extraction based on a single value, a range of values or value ranges specified in a lookup table
Application
• extraction of point cloud subsets, e.g., all groud points or all points which show an intensity greater than a threshold value

Tool: Grid Cell Interchange between Grids [interactive]

Features
• interchange of grid cell values between two grids
Application
• manual cleanup of ground and non-ground data sets

Tool: Join Attributes (PC)

Features
• joining of attributes from a second point cloud to the input point cloud based on a unique identifier
• attributes to join can be selected
Application
• attachment of information from one point cloud to another

Tool: Join Attributes by NN Search (PC)

Features
• joining of attributes from a second point cloud to the input point cloud based on a nearest neighbor search
• maximum distance threshold
• attributes to join can be selected
Application
• attachment of information from one point cloud to another, e.g., classification

Tool: Map Point Cloud to Scanner

Features
• mapping of points of a point cloud to scanner positions or trajectories based on GPS time or nearest neighbor search
• attachment of the scanner position and/or the direction vector pointing to the scanner position as attribute(s)
Application
• attachment of the direction vector to scanner in order to correctly estimate the normal vector orientation

Tool: Merge Point Clouds

Features
• merging of two or more point clouds into a single dataset
• optionally a unique identifier attribute field can be added
Application
• merging of point clouds from different scan positions or flight strips

Tool: Point Cloud Cluster Analysis

Features
• cluster analysis on selected point cloud attributes
Application
• clustering of points based on attribute values, e.g., intensity

Tool: Reclassify Point Cloud Attribute

Features
• reclassification of points based on attribute values
• reclassification based on a single value, a range of values or value ranges specified in a lookup table
• special options for NoData values and values outside the classification range
Application
• reclassification of point clouds based on attribute values, e.g., merge three vegetation classes into one

Tool: Remove Overlap from PC Tiles

Features
• removal of spatial overlap from point cloud tiles
• bounding boxes of tiles are defined in a polygon shapefile
• reading of all files in an input directory and writing of the result to another directory
Application
• removal of spatial overlap from point cloud tiles after processing

Tool: Retile Point Cloud

Features
• retiling of a point cloud into several datasets based on a polygon shapefile
• tiles are defined by the bounding boxes or by the (irregular) shapes of the polygons
• output directly to disk, optionally
Application
• spatial retiling of point clouds, e.g., in order to generate smaller tiles for data processing or for use in a virtual point cloud dataset

Tool: Rotate PC to Horizontal Plane

Features
• rotation of point cloud datasets to the horizontal plane for further (in most cases grid-based) processing
• output of the transformation matrix
Application
• rotation of point clouds with more or less vertical structures to the horizontal plane
• preparation of grid-based processing (and attachment of processing results back to the point cloud later)

Tool: Split Point Cloud

Features
• splitting of a point cloud into several datasets based on the values of an attribute field and a user provided interval
Application
• separation of point classes or flight strips
• tiling based on, e.g., GPS time

Tool: Transform Point Cloud

Features
• shifting, rotation and/or scaling of a point cloud
Application
• point cloud transformation
• e.g., application or removal of a "false easting"
• e.g., rotation of a point cloud in the scanner coordinate system

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