El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / At present, topographic surveys in road projects are very important, since it allows us to know the conditions and variable characteristics of the area to be executed. Commonly these surveys are carried out using a total station, high precision equipment, which in turn generates a lot of demand for time in the field and a greater number of personnel for a wide study area. For this reason, another alternative for obtaining terrain data is the use of the photogrammetric technique with UAV, since the objective is to increase productivity in the topographic survey. In this article, the productive development generated in the crews was analyzed using the total station survey methodology and the UAV photogrammetric technique using balance charts with the aim of obtaining the productive, contributory and non-contributory works, since the latter two they do not add value to the development of the project. This research was carried out in a rural area with a study area of 3 Ha and its classification by orography is of type 2 soil (undulated terrain), located in the Cuculí town center, Chongoyape district, Chiclayo province in the department of Lambayeque, Peru. In order to demonstrate that the UAV survey reduces non-contributory work by 47.2%, among the most outstanding activities obtained in this research are the leisure time that the staff presents in different situations of the project development, care of topographic equipment and another of the most outstanding was the use of cell phones in the field, which do not provide efficiency in the development of data collection and therefore would increase in time and cost of linear works, sanitation and projects in open places in the stage of design engineering.

The study examined contractor demographics, business and technological characteristics, costs, and production information for 15 independent logging firms in the Appalachians. Contractors represented nine states and were studied from 1995 to 1997. Each contractor's cost and production information was used to determine his economic efficiency for the study period. Total annual production for the firms ranged from 2,728.26 tons to 213,194.74 during the three-year period. Four contractors' median weekly production decreased from 1996 to 1997, while three contractors increased their weekly median production. Labor was the largest cost category for the smaller production contractors and contracted services tended to be the largest category for the larger producers. Regression analyses found that the cost of producing an additional ton increased from 1995 to 1996 and decreased from 1996 to 1997. Total cost per ton increased for four contractors from 1995 to 1996, while four showed decreasing cost per ton. For 1996 to 1997, five contractors had a cost per ton increase and seven showed a cost per ton decrease. Some of these shifts can be attributed to the fact that several of the mechanized contractors in the Central-Appalachians were "start-up" contractors when the study began. West Virginia contractors had the highest workers' compensation premiums per ton and Georgia contractors had the lowest. Labor costs per ton were highest for North-Central Appalachian contractors and lowest for the Southern Appalachian contractors. Contractors who produced predominantly sawlogs tended to have higher efficiency rankings than those who produced primarily pulpwood. / Master of Science

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