Project Description

It must be stated which terrain model Novapoint Noise is to be attached to (done in Project-ID). Terrain profile, gradient, heights, etc. are collected from this terrain model.

It is crucial that we have gotten ourselves a thorough overview of the terrain model and prepared it before proceeding with Novapoint Noise. If we don't have control of the terrain model, the results of the noise calculations will not be reliable. What we have to know about the terrain model is described in appendix A. It is obligatory to read this appendix before starting to use Novapoint Noise.

The map is normally read in 3D (see the chapter Draw map from terrain model).

The dialog box “Roads and railroads” for entering and editing of roads and railroads appears (Chapter Roads and railroads). From this we get access to the dialog box “Traffic data” for entering and editing of traffic data. A road is defined by clicking an existing centre line or draw a line to be used as a centre line. An identity is given to each road. Each road must also be given traffic data: ADT, speed limit and percentage heavy vehicles.

N.B! Prior to defining the road in Novapoint Noise, it has to be prepared in the terrain model. Road edges must be defined (see chapter A.5 in appendix A).

The dialog box “Buildings” for entering and editing of buildings appears (see chapter Buildings).

All buildings that may shield any of the calculation points must be entered. Each building is given a specific identity. Data on the buildings may be collected from the terrain model. These may be supplemented in Novapoint Noise. Calculation points may be attached to buildings (see chapter Calculation point attached to building), and buildings with calculation points attached may be coloured according to the highest level for all calculation points attached.

The dialog box “Calculation points” for entering and editing of calculation points appears (see chapter Calculation points). Each point is given an identity, x, y and z. The points may be entered directly from the map. A grid of points for the calculation of noise contour lines may also be entered.

The dialog box “Hard ground regions” for entering and editing of regions of hard ground (see chapter Hard ground regions). Examples of hard ground regions are water, asphalted areas, areas with gravel etc. Each region must be registered and be given an identity.

The dialog box “Barriers” for entering and editing of barriers appears (see chapter Barriers). The barriers are built up along a centre line. Novapoint Noise generates a terrain profile under the barrier. The barrier height may be entered in various ways.

The dialog box “Calculation of alternative” for the preparing and starting of the calculation (see chapter Calculation of alternative). All input data which is to be allowed for the calculation, must be set to active before starting the calculation. We also have to assure that the groups and feature codes in the terrain model are the way they should be. We have to specify whether or not reflections are to be considered in the calculation.

The dialog box “Noise contour lines” appears (see chapter Noise contour lines). We may have the noise contour lines calculated and the areas between them coloured (noise level areas), based on the noise values of the calculated calculation points.

All input data which is to be calculated, must be set to active before starting the calculation. We also have to assure that the groups and feature codes in the terrain model are set correctly.

When we click Style (see chapter Style) a sub menu appears, in which we may set different parameters for the appearance of the presentation of the map, among others profile drawing, colour scale and text describing calculation points and alternatives.

The dialog box “Reports” for choosing type of report and file name appears (see chapter Reports). Simple reports and reports showing all details may be created. The reports may be written to a format which may be imported to spreadsheets.

Prepare the drawing for AutoCAD 3D viewing.

Function to create a terrain profile between two selected points. It is used to ensure that Novapoint Noise reads the terrain correctly. Start and end points for the profile is stated, and also placement of the lower, left corner to point out where on the map it is to be drawn.

This is a function to highlight in red a certain profile of the profiles drawn on the screen (see also the function draw terrain profile in the dialog box “Calculation of alternative”, chapter Calculation of alternative). Profile number is stated (profile number in noise source the profile goes to).

When we click Deletion, a sub menu with the following choices appears: Delete temporary data, Delete noise contour lines…, Delete text for alternative, Delete colour scale and Delete non-noise-objects.

Deletes temporary data as e.g. terrain profile and lines between noise sources and calculation points.

Here a picture appears, where you may choose whether to delete noise contour lines and/or coloured areas.

Deletes the text box showing the names of the different alternatives.

Deletes colour scale from the drawing.

Deletes all objects in the AutoCAD-drawing which are irrelevant to Novapoint Noise. ## This fuction can be used for redrawing a map from the terrain model. The function supports AutoCAD's Undo command.

The dialog box “Global settings” gives the opportunity to make general choices which are not attached to any particular Novapoint Noise object (see chapter Global settings).

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