Derive Layer CS - Merge - Cross Section Software Help
Derive layer feature is one of the important features in ESurvey CADD section module, Derive layer means,create a new layer data from the reference of existing data.
For example,In the sample cross section shown below, hatching area is indicating the filling area is not correct as Layer 23 data just indicates topmost values of a layer and does not have levels to match with the slope. Derive CS Merge layer is introduced to make new layer combine data of 2 existing layer. In this example, Layer 23 and Layer 21 are merged together to derive layer 41, which can give correct area calculation.
1. Open 'Derive CS layers' from 'Modify' menu
2. Select 'Merge' option from the 'Layer Types' tree view. Click 'New' button and give derive layer name as 'merge21-23', select Resultant Layer as 'Layer 41'. Select first layer as 'Layer 21', second layer as 'Layer 23' and click 'Save' button.
3. Now close 'Derive CS layers' window and select any cross section you can see the result in drawing like below, layer41 has combined values of Layer 23 and Layer 21.
Finally, you can take area between Layer 41 and OGL layer total required quantity has arrived.