## 3 Results
### Data Exploitation and Digital Products  
Identifying pottery-related issues as Units of Topography and providing them with geo-referred coordinates is at the basis of GIS-based data exploitation, following the principles of Landscape Archaeology. It has a great potential for pottery studies and, despite some valuable outcomes [69; 70], it has not been a major concern for pottery analysts, at \begin{table}
\begin{tabular}{l c c c c c} \hline \hline \multirow{2}{*}{**Table**} & \multicolumn{2}{c}{**Interfaces**} & \multirow{2}{*}{**Related Tables**} & \multirow{2}{*}{
\begin{tabular}{c} **Leading Unit** \\ **of Information** \\ \end{tabular} } & **Related Units** & & **Related Units** \\ \cline{2-5}  & **Filling Form** & & & **Pinning Template** & & **of Information** \\ \hline
1. U. of & & Yes & 3, 4, 8, 6, 7, 10 & UT & Ac, Sample, Th-S \\ Topography & & Yes & 3, 5 & Actor & UT \\
2. Actors & Yes & Yes & 3, 5 & Actor & UT \\
3. Ac-UT Relation & Yes & No & 1, 2 & - & Ac, UT \\
4. UT-UT Relation & Yes & No & 1 & - & UT \\
5. Ac-Ac Relation & Yes & No & 2 & - & Ac \\ \hline
6. Ceramic material & Yes & Yes & \(1,7,8,9,10\) & Sample & Th-S, Ph-Id, D-Id, US, UT \\
7. Conteks & Yes & Yes & 1, 6 & US & Sample, UT \\
8. Photograph & Yes & No & 1, 6 & File name (Ph-Id) & Sample, Th-S, UT \\
9. Draw & Yes & No & 6 & File name (D-Id) & Sample \\
10. Petrography & Yes & Yes & 1, 6 & Thin-section (Th-S) & Sample, UT \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary table of table relations and leading or related units of information, in accordance with the Greyware data model shown in Figure 6.  
least for the medieval and post-medieval period in Spain. Landscape archaeology has benefitted significantly from interdisciplinary views and the exchange of information with palynology or georadneology, while the _spatial turn_[71] claimed by GIS-based researchers in history and archaeology has reached pottery specialists only partially. Existing literature on GIS-based intra-site spatial analysis on pottery fragments distribution and on pottery distribution patterns from surveys is valuable [72], although it concerns mainly research on Classic Greek and Roman pottery [73] or Neolithic artefacts [74]. In most cases, only pottery remains are considered, and no complementary data obtained from written or ethnographic sources are included within territorial exploitation. This kind of approach uses pottery distribution is a method for solving research questions related to landscape organization and settlement patterns [75], while pottery itself--its production, distribution and consumption--is rarely the object of study. GIS-based landscape analysis and distribution of medieval and modern common wares is still missing in most contexts in Spain. Figure 7 shows a screen view of GIS-based research aiming at identifying the main production areas and clay supplies in northern Catalonia as an example of archaeological landscape analysis of pottery production. Pottery workshops, clay sources and production areas are classified and represented on the map according to the information recorded in the Greyware system and exported as a csv-formatted file. As long as they have been recorded as Units of Topography, the table mapped in Figure 7 is the resulting cross-search of these UT in the specific area of northeastern Catalonia. This is just an example of integrated data exploitation in which the origin and nature of the information source no longer affect the final interpretation process nor compromise interdisciplinary research. This exploitation focuses on the territorial distribution of pottery production and, to some extent, overlooks the existing relations between workshops, potter lineages, the material evidence for pottery productions or the chronological evolution of potting practices. The Horai UT/Ac proposal--although originally thought for landscape archaeology--goes beyond spatial representations and can focus on temporal sequences and relational data interpretation as well.