3. Elements of the program DCIP2D

3.1. Introduction

The DCIP2D v5.0 program library consists of the programs:

1. DCIPF2D: performs forward modelling for DC and IP data

2. DCINV2D: inverts DC potentials to recover a conductivity model

3. IPINV2D: inverts IP data to recover a chargeability model

Each of the above programs requires input files as well as the specification of parameters in order to run. However, some files are used by a number of programs. Before detailing the run procedures for each of the above programs we first present information about these general files.

3.2. General files for  programs

There are six general files which are used in DCIP2D. These are:

1. observations file: specifies the observed measurements and the associated electrode locations

2. electrodes file: contains the electrode locations for forward modelling

3. mesh2D file: contains the finite difference mesh for the 2D modelling and inversions. A special type of model file specifies the active cells.

4. topo2D file: contains the topographic data

5. model2D file: structure to hold cell values for models: conductivity, chargeability or active

6. weights2D file: file that contains special weightings which alter the type of model produced in the inversions

• 3.2.1. Observations file
• 3.2.2. Electrodes locations file
• 3.2.3. Mesh2D file
• 3.2.4. Topo2D file
• 3.2.5. Model file
• 3.2.6. Active model file
• 3.2.7. Weights2D file