scholarly journals Estimating slope from raster data: a test of eight different algorithms in flat, undulating and steep terrain

2011 ◽  
Author(s):  
J. Tang ◽  
P. Pilesjö
Keyword(s):  
Raster Data ◽  
Steep Terrain

A Spatiotemporally Variable Model for Nowcasting Storm Motion Vectors using Remotely Sensed Raster Data

2017 ◽  
Vol 17 (17th International Conference) ◽  
pp. 1-23
Author(s):  
Shaimaa El Sharkawy ◽  
Mona Safar ◽  
Mohamed Gad
Keyword(s):  
Remotely Sensed ◽  
Raster Data ◽  
Motion Vectors ◽  
Variable Model

scholarly journals Evaluation of Salvage Logging Productivity and Costs in the Sensitive Forests of Bulgaria

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 309
Author(s):  
Stanimir Stoilov ◽  
Andrea R. Proto ◽  
Georgi Angelov ◽  
Salvatore F. Papandrea ◽  
Stelian Alexandru Borz
Keyword(s):  
Cycle Time ◽  
Operational Efficiency ◽  
Fixed Costs ◽  
Labor Costs ◽  
Salvage Logging ◽  
Operational Conditions ◽  
Work Cycle ◽  
Wet Snow ◽  
Productivity Rate ◽  
Steep Terrain

Steep terrain harvesting can only be implemented by a limited set of operational alternatives; therefore, it is important to be efficient in such conditions, in order to avoid incurring high costs. Harvesting abiotically-disturbed forests (salvage harvests caused by wet snow), which is becoming common these days, can significantly impact the operational efficiency of extraction operations. This study was implemented in order to evaluate the performance of truck-mounted uphill cable yarding operations in salvage logging deployed in coniferous stands. A time study was used to estimate the productivity and yarding costs, and predictive models were developed in order to relate the time consumption and productivity to the relevant operational factors, including the degree of wood damage. The average operational conditions were characterized by an extraction distance of 101 m and a lateral yarding distance of 18 m, resulting in a productivity rate of 20.1 m3 h−1. In response to different kind of delays, the productivity rate decreased to 12.8 m3 h−1. Under the prevailing conditions, lateral yarding accounted for 32% of the gross work cycle time, and for 50% of the delay-free work cycle time of the machine. Decreasing the lateral yarding distance and increasing the payload volume to the maximum capacity of the machine would eventually lead to a yarding productivity of close to 30 m3 per SMH (scheduled machine hour). The calculation of the gross costs of uphill yarding showed that the labor costs (35.7%) were slightly higher than the fixed costs (32.9%), and twice as high compared to the variable costs (17.7%). The remote control of the carriage, mechanical slack-pulling mechanisms, and radio-controlled chokers are just some of the improvements that would have led to increments in operational efficiency.

Efficient computation of map algebra over raster data stored in the k2-acc compact data structure

2021 ◽  
Author(s):  
Mónica Caniupán ◽  
Rodrigo Torres-Avilés ◽  
Tatiana Gutiérrez-Bunster ◽  
Manuel Lepe
Keyword(s):  
Data Structure ◽  
Efficient Computation ◽  
Map Algebra ◽  
Raster Data

scholarly journals The wildland-anthropic interface raster data of the Italy–France maritime cooperation area (Sardinia, Corsica, Tuscany, Liguria, and Provence-Alpes-Côte d'Azur)

Data in Brief ◽  
2021 ◽  
Vol 38 ◽  
pp. 107355
Author(s):  
Liliana Del Giudice ◽  
Bachisio Arca ◽  
Carla Scarpa ◽  
Grazia Pellizzaro ◽  
Pierpaolo Duce ◽  
...  
Keyword(s):  
Raster Data

Self-affine scaling and subsurface response to snowmelt in steep terrain

1991 ◽  
Vol 123 (3-4) ◽  
pp. 395-414 ◽  
Author(s):  
Christopher J. Duffy ◽  
Keith R. Cooley ◽  
Neil Mock ◽  
Do-Hun Lee
Keyword(s):  
Affine Scaling ◽  
Steep Terrain

Optimisation of the Uav-Ppk-Sfm Workflow for 4d Surface Change Detection in Steep Terrain

2021 ◽  
Author(s):  
Miluska Anthuannet Rosas ◽  
François Clapuyt ◽  
Willem Viveen ◽  
Veerle Vanacker
Keyword(s):  
Change Detection ◽  
Surface Change ◽  
Steep Terrain
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