The package opalsGeomorph provides modules dealing with the extraction of terrain features. Breaklines mark discontinuities in the surface slope. They are of crucial importance for the geomorphological quality of the DTM. opalsGeomorph, therefore, provides modules for automatic detection and modelling of such lineaments.

Scripts and Modules of Package opalsGeomorph
Python Scripts	Description
gmpLineMerge.py	Merges multiple structure line data sets into a single line network.
gmpLineModeler.py	Derives 3D structure lines from point clouds.
opalsGeomorph.py	Package script providing tools for deriving geomorphic structure lines.
Modules	Description
Colorize
Convolution	Performs convolutional filtering operations on a raster image.
EdgeDetect	Provides different raster based edge detection algorithms (e.g. Canny).
Export	Exports vector data stored in an OPALS data manager (ODM) in various data formats.
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 information of an ODM, vector or raster file.
LineModeler	Models 3D structure lines based on a point cloud (ODM) and 2D line approximations.
LineTopology	Provides different line merging and topology correction tools for cleaning line networks derived via automatic edge detection.
Rasterize	Performs vector-to-raster conversion for all types of simple feature geometries (points, lines, polygons).
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.