## 4 Discussion of the Results Analysis: First Findings on Trends and Best Practices
### Main Findings for the Grey Literature Sample
#### 4.2.3 Trends in Heritage Practice  
The above use cases and situations revolve around specific types of applications, given the match that is established between the specifics of the single or multiple technologies used, the observables/measurable parameters and properties, and the given hazards or damage factors to address. Therefore, according to this rationale, for instance, the photo-interpretation of old and recent aerial photography is exploited to discover and inventory buried sites; InSAR satellite RS is searched for by users to monitor structural deformation and characterize the impact due to \"Sudden ecological or geological events\" such as ground motions, landslides, and the impact of local tectonics; and change detection based on optical imagery is suitable for monitoring (and potentially preventing) new urban development and infrastructure construction that may affect landscapes with known archaeological potential. Nevertheless, the analysis of the Grey literature has not highlighted a predominant factor or a group of factors that are more addressed with RS and geomatic techniques than others. One of the reasons that can plausibly explain this apparently contrasting evidence with the scientific literature is the diversity in the mission, scope, and type of activities between academia and heritage bodies. Almost 70% of scientific research (and thus scientific papers) focuses on 1 or up to 3-4 topics, whereas the institutional duty of safeguarding and preserving heritage implies that a plurality of threats and factors of potential damage needs to be addressed. While, on one hand, the specificity of the sites or monuments may emphasize a series of threats (e.g., coastal sites may be more exposed to erosion, flooding, impacts due to climate as opposed to inland urban monuments that may be more exposed to pollution, weed vegetation, vandalism, and graffiti), on the other hand, it is very likely that different sites, monuments, and landscapes share similar threats. It should not be forgotten that key duties of site managers (e.g., management, protection from human activities and interactions with the surrounding natural environment, and weather conditions) are definitely common. The characteristics of the geomatics discipline are based on the study and application of a series of (usually remote sensing) technologies. Therefore, such studies usually refer to one predominant technology (for example, satellite remote sensing, examined by this paper) in combination with one or a few additional technologies. Such an approach is also oriented by the very nature of geomatics scientific literature, which is required to emphasize novelties and new achievements in the technological domain rather than the proof of an \"all-inclusive\" approach to monitoring the case study's archaeological site. Hence, such a discrepancy should not be seen as a flaw in the scientific literature but rather as emphasizing the different needs of different communities, one being the content and another being the timing. Specifically, when operating in domains of scientific advancement, it is appropriate that the scientific community focuses on the highest existing achievements in its own sector and that such important advancements are promptly shared and discussed with the community. Specifically for the purposes of our study, the evidence for this is found in the increased number of publications based on the processing of satellite imagery in recent years, as discussed in Section 3.1. On the other hand, when collaboration between the technological scientific community and public administration is established, it is imperative that the users' needs (and hence their skills and final expectations) should be met. From the examples of Grey literature, it can be noted that a more holistic approach to site and monument preservation and promotion is desired by the public administrations.