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.

Modules | Description |
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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. |