Basic Examples (4) 

Open the LineTerra toolbar for a project. This is the entry point to every other window -- Terrain, Plan/Profile, Intersect, Templates, Sections, Earthwork, Export, 3D View and Bake Road. Evaluating it again with the same name reopens that road; with a different name it opens another road on the same terrain:

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The alignment and profile geometry is plain kernel code. Cumulative chainage along a three-point alignment:

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Rounding the corner with a 40 m arc shortens the route from the 200 m walked by the two straight legs:

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The design level at a chainage, with a parabolic vertical curve applied at the crest. The grade changes from +10% to -5%, a change of 15%, so a K-value of 5 gives a 75 m vertical curve:

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Scope (6) 

Terrain comes from whichever source suits the stage of the project. A GeoTIFF elevation raster, with its.tfw world file or with the georeferencing tags embedded in the file itself:

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A LIDAR point cloud, gridded from its ground-classified points. A.laz file needs PDAL or LASzip on the system path; a.las file is read with no external tool:

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A synthetic corridor strip following the assumed route centreline, which keeps a very long route's terrain to a workable size. Make the number of cross samples odd, so one falls on the centreline:

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Work can be carried out in latitude and longitude or in a national grid, and most countries' grids are supported. Converting to the British National Grid:

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Any UTM zone or other supported projection can be named by its EPSG code directly:

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Cross-sections export to PDF at an exact drawing scale, to a notebook as named vector graphics, or to true-scale DXF. DXF coordinates are real-world metres -- one drawing unit is one metre -- with geometry separated onto per-section GROUND, DESIGN and SCALE layers:

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Applications (11) 

First, evaluate the follwoing and you will get the main menu. Choose New Project then Terrain:

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Press LAZ/LAS point Cloud. If it is a LAZ file then you must have PDAL or LASzip on the system path, e. g.: brew install pdal. (See “Read this first). If you have or it is a LAS file the file will be read directly:

The preview can be shown in the normal way:

Pressing Plan and then adding IPs to form a road alignment:

Extracting a profile:

Either open a template library or design new ones. Here we have opened the library so we can use the motorway and bridge templates:

Assign sections to the alignment:

Calculating earthworks we get an updated plan:

And earthwork quantities:

Leaving Earthworks on Auto we can then adjust the profile and/or the planned alignment and the quantities and plan will instantly update:

The road can be baked into the terrain and a 3D image produced. Sections or the plan can be exported to scale: