Loss in value for all areas of designated land-use

Example

Path: Examples\Extras\Monetary2.cna

The same scenario shown in last example is used again, but now the result is to be evaluated for all areas separately. Load the file "Monetary2.cna."

Step 1 - Building evaluation and calculation of a building’s noise map for all residential areas

This calculation has just been done - if not look to step 1 in the last chapter.

Step 2 - Evaluation for each separate area using Object-Scan

The reduction of value due to noise shall be calculated separately with regard to the buildings in each area. This resulting value shall be written to the attributes BEZ and ID.

Open the dialog Object-Scan on the Grid menu. On option „Action/Sum into“ select „Specified Areas/Polygons“ as shown in the following figure.

The parameters in the dialog Object-Scan to write the results in the field „Name“ and „ID“ of each area

Target object type is Area of Designated Use. With BEZ and ID as attributes the results are written into the box „Name“ and „ID“ of each area. After doing this evaluation you find the result value in column Name of Tables| Other Objects|Area of Designated Use as shown in the following table.

Results in column Name after evaluation

The value 0.00 (zero) in the field „Name“ or „ID“ indicates that either the assessment level is more then 5 dB below the maximum sound level (and therefore no rent reduction occurs) or that non building is placed in that area.