Package opalsSurface

The module opalsSurface contains modules for the derivation of surface models based on different interpolation techniques (Constrained Delaunay Triangulation, Moving Least Squares, Inverse Distance Mapping, Linear Prediction/Kriging ... ) and different data structures (TIN, grid, hybrid grid incl. structure information like breaklines ...). Furthermore, modules for visualization, simplification and analysis of terrain and surface models are included.

Scripts and Modules of Package opalsSurface
Modules Description
Algebra Provides a generic raster algebra calculator featuring mathematical, statistical and conditional operators.
Bounds Derives and stores the 2D boundary polygon of a region covered by the point data of an ODM or the valid pixels of a raster.
Cell Calculates statistical features of user defined attributes and stores them as raster models or rasterized point clouds.
Colorize
DSM Calculates a land cover dependent DSM raster model based on the approach of Hollaus et. al. (2010).
DTM Calculates a high quality Digital Terrain Model in hybrid grid structure (i.e. regular grid + structure lines).
Diff Calculates a difference grid model based on either two grids or a one grid and a horizontal reference plane.
DtmAccuracy
Export Exports vector data stored in an OPALS data manager (ODM) in various data formats.
FillGaps Detects gaps (i.e. void pixels) in raster models and provides several interpolation methods to close them.
Grid Derives a 2.5D digital elevation models (DEM) in regular grid structure using simple interpolation techniques.
GridFeature Derives feature models (slope, curvature, roughness, etc.) from grid models based on the local grid neighbourhood defined by a kernel.
Histo Derives histograms and descriptive statistics (min, max, mean, r.m.s, etc.) for ODM or grid/raster data sets and stores the results graphically (SVG) and numerically (XML).
Import Loads vector and raster data into an ODM for subsequent use in modules dealing with point cloud and line related data.
Info Extracts and reports header information of a vector or raster file (ODM, GDAL).
Isolines Derives contour lines (isolines) from grid models and stores them as a vector dataset.
Openness Provides a raster map of local viewsheds (i.e. openness) based on a DTM grid model.
Rasterize Performs vector-to-raster conversion for all types of simple feature geometries (points, lines, polygons).
Section Extracts sections of user defined width/length along a specified reference axis from a point cloud (ODM).
Segmentation Provides methods for point cloud segmentation based on local homogeneity using either a generic region growing approach or an adapted region growing for plane extraction.
Shade Derives shaded relief raster maps (geo-coded hill shading) of DEM grids.
Simplify Analyses a regular or hybrid grid model and generates an approximating TIN surface based on a coarse-to-fine approach.
TIN Creates a TIN surface from ODM vector data based on a 2D constrained Delaunay triangulation.
TerrainMask Identifies open terrain parts of a DSM input raster using the volume based approach by Piltz et al. (2016).
Translate Performs format conversion for vector data files with additional read support of GDAL rasters.
Vectorize Performs raster-to-vector conversion and exports polyline geometries.
View Provides an interactive 3d viewer for points (including arbitrary attributes) and lines.
ZColor Derives color coded visualizations of grid models and stores them as geo-coded raster images.