Introduction
============

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In this part, we develop the **strategy** for a **geophysical field-work
campaign** carried out along the surface over a target.

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Fieldwork
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Geophysical fieldwork campaigns utilise different **geophysical
methods**, e.g. gravity, ground-penetrating radar, electrical
resistivity tomography, magnetics, …

Each method has its own **instrument**, its own **workflow**, its own
**data export**, and its own **data export**. The challenge in a
multi-method campaign is to collect and merge the different data sets
and their interpretation.

Additionally, a project is embedded into the context of the field area.
Here, additional data such as **elevation data**, **aereal photos**,
**geological maps**, are often used to facilitate the interpretation.

It is therefore important to carefully plan the fieldwork campaign.

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Project design
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We first prepare our project by defining the **target area**. We
recommend:

-  **elevation data**, e.g. a digital terrain model (dtm),
-  **digital orthophotos** (dop), including their georeferenced
   coordinates,
-  **geological maps**, e.g. as shapefiles.

The digital terrain model will be stored in a special format, the
``geodyn5`` data format, which is a structured data format in plain
ascii (see chapter ``geodyn5``).

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Workflow
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.. image:: images/GPworkflow.png

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