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Projects and elements

A document created with SLIP is usually called a project. In particular, a project contains a 3D-model made of elements that have a geometrical representation (point/point-set, polygon, etc.), attributes/properties (name/id, emission-values, etc.) and can be in a selected or unselected state. A project also contains named-selections (e.g. variants), definitions, settings and results.

Layers / Pages

The elements in a project are regrouped in layers (a.k.a. pages). For example, a project often contains source-elements of diverse kinds (e.g. roads and railways); the layer Q contains all sources in a project. This is convenient for many frequent operations. Insbesondere können Sie jederzeit mit der Tastatur Layern ein- und ausblenden, indem Sie den Anfangsbuchstaben des entsprechenden Typs eingeben, z.B.,

für alle Quellen;
für alle Hindernisse;
für alle Topographien;
für alle Empfänger;
für alle Textelemente;
für alle Raster.

Siehe auch Sichtbare Elemente bestimmen (Menü Ansicht). For a complete list, see Liste Hot-Keys / Tastenkombinationen.

Modes

The program's main organization includes task-oriented "modes" (presented as tabs in the project's main window; see Das Programmfenster):

Main modi (try these first): Input (incl. import), Edition, Selection, Calculation, Results.
Other modi: Profile, 3D, Presentation, Measurement, Geo-referencing, Printing.

See also The program-modes.

Selections

Selections are practical and central:

Many operations act on selected elements (incl. noise-calculations).
The current element-selection is "persistent": in particular, when an element is selected (shown with a thicker line when using the standard settings), it remains selected until it's explicitly unselected (see Modus Auswahl).
Selections can be named and stored (for future use); named selections have their own calculation settings and results.
In particular, a named-selection is often used to represent a variant.
Named-selections can be used for "meta" calculations, e.g. for comparing two variants.

Coordinates, element-geometry: conventions

For each element's point/vertex, the following conventions are used [note in particular that, for practical reasons, two-height informations can be provided for vertices of element-types like buildings and barriers]:

X: northing
Y: easting
Z: abs. height of the bottom

H: height of the top rel. to the bottom (thus Z+H is the top's abs. height)

❑	Anmerkung: This information allows for a simple way of defining vertical walls in buildings and barriers, for example. Not all element types support this information (in which case, it's assumed to be 0).