Statistics¶

Use this dialog to generate statistics on accumulated quantities in one or more application layers (GMI).

Where can I find the dialog?¶

In the vertical list field of the terrain model drawing, right-click and select Tools - Statistics...

Using the Dialog¶

In this dialog, select the field (attribute) you want to group the statistics by. If you generate statistics for multiple application layers at once, the field must exist in all layers. The principle is that values are accumulated and grouped by the field or combination of fields. You can group by up to 20 fields.

Available quantities vary by data type:

Data Type	Count	Length	Length 3D	Area	Area 3D	Volume
Point	X
Line	X	X	X
Polygon	X			X
Triangle Net	X			X	X	X
Text	X

Available Methods¶

The function can be used in several ways:

Statistics on selection: Request statistics on a selection in the horizontal list field. In the object list, there is a right-click option to generate statistics.
Statistics on application layer: Request statistics on the application layer or multiple layers. In the application layer list, there is a right-click menu to generate statistics.

Note

Both methods take active filters in the layer into account. This means filtered objects are not shown in the statistics. For method 1, these objects will also not be selectable in the list.

Presentation of Results¶

The statistics results are displayed in Excel. The program includes a template named AlyStatistics.xls, located in the Sys directory.

Info

You can read more about Excel templates and troubleshooting in the user documentation if you encounter issues starting the template in Excel.

Important Notes¶

Warning

Please note the following for area calculations:

Polygons drawn clockwise have a positive area in the properties dialog.
Polygons drawn counterclockwise have a negative area in the properties dialog.
The report sums the absolute values of the areas, for example: \(10 m^2 + (-5 m^2) = 15 m^2\)