# 9.5.1. Survey Design and Forward Simulation¶

Here, we show how to create a simple dipole-dipole DC Resistivity survey over a conductivity model and run the forward simulation.

## 9.5.1.1. Setup for the Exercise¶

Tip

• Requires at least GIFtools 2.26 (login required)

### 9.5.1.1.1. Create Overlapping surveys¶

In order to compare the resolving capabilities of different survey configurations, we will generate two sets of line data with the following specifications:

Use the DCIP Survey Designer

 Block 1 Block 2 Survey Type DC DC Transmitters/Receivers pole-dipole pole-dipole IP Type Apparent Chargeability Apparent Chargeability Dimension 3D 3D Centroid 557250 E, 7134000 N 557400 E, 7133600 N Bearing $$45^\circ$$ $$90^\circ$$ Line Length (m) 1500 1500 Line Spacing (m) 300 100 Nb. lines 5 5 Electrode Spacing (m) 60 60 Nb. Receivers 20 20

Note

The survey do not contain elevation information. We will let the code set the vertical position based on the discretized topography.

### 9.5.1.1.2. Merge the surveys¶

• Since we are creating two separate surveys, the lineID assigned to Block 1 and 2 will be repeated. We will add a constant to the line ID so that they are all unique identifiers.
• Select Block 1 and combine block 2 to form one large survey.
• Data ManipulationAdd DataMerge other DCIP3D data

• Rename the combine object DCSurveyFull