Monument type

sherd-scattering of a Villa Rustica in a vineyard 

Survey data
Area investigated: 50 m x 55 m
Resolutions:    4MP/m2 (a = 0.5m): 2.750 m2                  

Array configuration: twin-probe array
Measuring instruments: Lippmann 4point light MC
Imaging software: SURFER (Golden Software)
Survey period: 30.09. - 04.10. 2011

Due to the immediate presence of large amounts of iron in the form of rods and wires, the use of geo-magnetics is impossible in vineyards. GPR can also be severely disturbed by too many iron objects. However, these exceptional conditions do not pose any problems for earth resistance area surveys. Electrical Resistivity is the only geophysical prospecting method that can be used without interference for this special  ​​application.

In 2011, finds of extensive Roman sherd scattering in a vineyard led to this special application of geoelectric prospecting for the first time. Since the soil is usually plowed up to a depth of 90 cm (deep ploughing) when a new vineyard is planted, the chances of finding well-preserved foundation structures are, however, lower. This also explains the rather rare use of resistivity on these areas.

In contrast to the survey results presented here, which only show a pronounced scattering of debris, there do exist prospecting results with clearly recognizable building structures. (see "Langenlonsheim")

As for reasons of tillage, machines move only on every second lane between the rows of wine, this leads to a strongly fluctuating, strip-shaped compaction of the survey area. For better readability, the survey image must therefore be postprocessed manually or with a "destripe filter". (see "Flonheim")

Working with tape-measures in the vineyard is challenging.
The often stony surface leads to more frequent incorrect measurements. Since the freedom of movement in the vineyard is very limited by the rows of vines, laying out the measuring tapes - especially in the horizontal direction - is tedious and time-consuming. Laying out the tapes vertically, much longer distances have to be covered.
With the use of GPS technology, however, work can be carried out just as quickly on these areas as on open spaces.