**7. Conclusions**

This research was aimed at assessing the use of hand-held MMS for environmental applications and, more in depth, for monitoring purposes. The case study investigated in Cortes de Pallas involved a very challenging area. The evidence that emerged from this study is that, as expected, CRP accuracy is strictly dependent on the supporting topographic network. Consequently, the MMS survey can only rely on it if combined in the same reference system. Once aligned, and in the case of the absence of UAV surveys, MMS was revealed to be an alternative to complete the 3D mapping of the area in a fast and agile way. As the managemen<sup>t</sup> of occlusion is a well-known issue, often irresolvable even with a more sophisticated TLS system, the geomatic community should put more effort into improving the MMS accuracy and reliability.

As the Kaarta Stencil 2 is still under development and a growing number of new tools will enter the surveying market, this research is the occasion to set a useful baseline for further implementations demanded by the market, not only in civil engineering but also in building construction.

**Author Contributions:** Conceptualization, S.B.; Data curation, F.D.S.; Formal analysis, M.C. and R.P.; Funding acquisition, E.S.M.; Methodology, R.P.; Project administration, J.L.L. and P.G.; Supervision, L.G.-A. and R.P.; Writing—original draft, F.D.S.; Writing—review & editing, J.L.L. and E.S.M. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** The authors are grateful to the Infrastructures Area of the Diputació de València for his support and interest to test new technologies in Cortes de Pallás. We also acknowledge UCM which granted the use of its ME5000 Mekometer through a co-operation agreement.

**Conflicts of Interest:** The authors declare no conflict of interest.
