## 3 Results
### Webpages and Digital Display of Content
Their webpages offer a varied range of information and digital resources of different kinds, in line with the expectations generated as sites that are highly symbolic as far as industrial heritage is concerned. In all these cases, the web popularity index is equal to or higher than 0.78. On a second level are all the other analyzed cases with lower scores than the first group, between 0.78 and 0.43, namely, the Riotinto, La Union, and Samu\(\hat{\text{n}}\)o mining areas (all three of which have been turned into mining parks and receive a large number of visitors every year). The La Encartada Beret Factory ranks last among all the cases studied with a WPI of 0.43. According to these figures, each selected building and site ranks in different positions, depending on the level of technology applied on their webpages (Figure 3). The general average of the complied variables is 70%, which represents a good level as a whole, but could be improved in certain aspects. The variable with the highest level of compliance refers to the presentation of interesting content (100%), followed by the attractive design and well-structured content (91%), smart event calendar log (91%), online promotion of other representative tourist attractions (91%), and integrated presence in social media (91%). The access to multilingual information, destination displayed with Google Maps\({}^{\text{TM}}\) and/or Street View, and access to PDF digital leaflets or photograph-based 3D model variables were complied with in 82% of cases. In the other variables, the compliance percentages ranged from 73% to 1%. Weather information was only available in one of the selected cases, which is quite surprising as weather conditions affect the number of people visiting industrial heritage buildings and sites. Levels of presence are also low in the variables regarding the possibility of using mobile device apps (18%) and the availability of a virtual tour (36%). The possibility of expressing opinions and giving scores online is clearly above average (64%), while compliance with the other variables is around 70% (Table 2). Figure 2: Almadén mining area. Author: [PERSON]. Multilingual information can be found at all the selected sites, except in the La Union and Samu\(\tilde{\text{n}}\) mining areas. In the other case studies, information is always offered in Spanish and English and, more specifically and occasionally, in other languages. On the issue of this variable, it is striking that on the Riotinto area website (Figures 4-6)--corresponding to an area in the province of Huelva close to the Portuguese border and which attracts numerous visitors from the neighboring country--the information is not available in Portuguese. \begin{table}
\begin{tabular}{l c} \hline \hline
**Variable** & **Percentage** \\ \hline
1. Attractive design and well-structured content & 91 \\
2. Presentation of interesting content & 100 \\
3. Smart event calendar log & 91 \\
4. Availability of weather information & 1 \\
5. Access to multilingual information & 82 \\
6. Possibility of booking tickets online & 73 \\
7. Online promotion of other representative tourist attractions & 91 \\
8. Destination displayed with Google MapsTM and/or Street View & 82 \\
9. Possibility of using mobile device applications & 18 \\
10. Integrated presence in social media (Facebook, Twitter, YouTube, etc.) & 91 \\
11. Possibility of giving opinions and ratings & 64 \\
12. Availability of a virtual tour & 36 \\
13. Access to PDF digital leaflets in or 3D models from photographs & 82 \\
14. Access to multimedia tools (videos, audios, augmented reality, 360\({}^{\circ}\) & 73 \\ panoramas, etc.) & 70 \\ Mean value (\(\mathbf{\widehat{X}}\)) & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Overall level of compliance of the selected variables. Figure 3: Web popularity index (WPI) of industrial heritage buildings or areas. Source: own elaboration. Figure 4: Orthophoto and location of the Riotinto mining area. Source: [PERSON] (UNED SIG Laboratory). Figure 5: 3D model of the Riotinto mining area [29].