scholarly journals Analyse semi-automatisée de photos aériennes numérisées pour l'étude de la dynamique de peuplements arborescents | Semi-Automatised Analysis of Digitised Aerial Photographs for the Study of Arborescent Population Dynamics

2000 ◽  
Vol 151 (7) ◽  
pp. 238-242
Author(s):  
Vincent Barbezat
Keyword(s):  
National Forest Inventory ◽  
Aerial Photographs ◽  
Forest Planning ◽  
National Forest ◽  
Federal Institute ◽  
Swiss Confederation ◽  
Institute Of Technology ◽  
Regional Forest ◽  
User Friendly ◽  
Standard Tree

At the present time, landscape inventories, the third National Forest Inventory (NFI), permanent research plots in the forests,cantonal inventories, regional forest planning, the redefinition of useful farm land, a new inventory of standard tree orchards but also the protection of peat bog and alluvial areas are daily business. Therefore, the development of a software for automated aerial photograph analysis is of greatest interest to the Swiss Confederation and its cantons as well as to forest owners, research institutes and certain industries (private engineering enterprises, software producers). In answer to these expectations, the Antenne Romande WSL, together with the Institute of Production in Microengineering of the Swiss Federal Institute of Technology Lausanne(EPFL), proposes to develop a software for user-friendly, neutral and rapid image-processing, the working precision of which will suit forest and landscape managers. Moreover, the software will provide scientists with basic data for the modelling of various ecosystem processes.

Cost- und Monitoring-Projekt: Zwei neue forstliche Meinungsumfragen im Vergleich | The Cost- and Monitoring-Projects: A Comparison of Two New Forestry Opinion Polls

2000 ◽  
Vol 151 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Stephan Wild-Eck ◽  
Willi Zimmermann
Keyword(s):  
Large Scale ◽  
Forest Policy ◽  
Forest Economics ◽  
Positive Attitudes ◽  
Federal Institute ◽  
Swiss Confederation ◽  
Institute Of Technology ◽  
The Cost ◽  
Near Future ◽  
Opinion Polls

Two large-scale surveys looking at attitudes towards forests, forestry and forest policy in the second half ofthe nineties have been carried out. This work was done on behalf of the Swiss Confederation by the Chair of Forest Policy and Forest Economics of the Federal Institute of Technology (ETH) in Zurich. Not only did the two studies use very different methods, but the results also varied greatly as far as infrastructure and basic conditions were concerned. One of the main differences between the two studies was the fact that the first dealt only with mountainous areas, whereas the second was carried out on the whole Swiss population. The results of the studies reflect these differences:each produced its own specific findings. Where the same (or similar) questions were asked, the answers highlight not only how the attitudes of those questioned differ, but also views that they hold in common. Both surveys showed positive attitudes towards forests in general, as well as a deep-seated appreciation ofthe forest as a recreational area, and a positive approach to tending. Detailed results of the two surveys will be available in the near future.

scholarly journals Der Datensatz «Walderschliessungsstrassen 2013» des Schweizerischen Landesforstinventars

2016 ◽  
Vol 167 (3) ◽  
pp. 136-142 ◽  
Author(s):  
Kalin Müller ◽  
Marielle Fraefel ◽  
Fabrizio Cioldi ◽  
Paolo Camin ◽  
Christoph Fischer
Keyword(s):  
Forest Inventory ◽  
National Forest Inventory ◽  
National Forest ◽  
Navigation Systems ◽  
Spatial Accuracy ◽  
Forest Roads ◽  
Additional Information ◽  
Federal Institute ◽  
Geo Dataset ◽  
Landscape Research

The Swiss National Forest Inventory dataset «Forest Access Roads 2013» Information on forest accessibility is important for forest management. For example, it helps to determine the potential wood supply and identify areas difficult to access. In 2013–2014, a survey was conducted in Switzerland to update the Forest Access Roads geo-dataset within the framework of the Swiss National Forest Inventory (NFI). The resulting nationwide dataset contains valuable information on truck-accessible forest roads that can be used to transport wood. The survey involved interviewing staff from the approximately 800 local forest services in Switzerland and recording the data first on paper maps and then in digitized form. The data in the NFI on the forest roads could thus be updated and additional information regarding their trafficability for specific categories of truck included. The information has now been attached to the geometries of the Roads and Tracks of the swissTLM3D (release 2012) of the Federal Office of Topography swisstopo. The resulting data are suitable for statistical analyses and modeling, but further (labour-intensive) validation work would be necessary if they are to be used as a basis for applications requiring more spatial accuracy, such as navigation systems. The data are managed at the Swiss Federal Institute for Forest, Snow and Landscape Research (WSL) and are available for third parties for non-commercial use provided they have purchased a TLM license. In this article, the dataset, as well as its acquisition and potential uses, are described.

Integrating remote sensing and past inventory data under the new annual design of the Swiss National Forest Inventory using three-phase design-based regression estimation

2014 ◽  
Vol 44 (10) ◽  
pp. 1177-1186 ◽  
Author(s):  
Alexander Massey ◽  
Daniel Mandallaz ◽  
Adrian Lanz
Keyword(s):  
Forest Inventory ◽  
Estimation Procedure ◽  
National Forest Inventory ◽  
Aerial Photographs ◽  
Stem Volume ◽  
Permanent Plots ◽  
National Forest ◽  
Special Focus ◽  
Second Phase ◽  
Three Phase

In 2009, the Swiss National Forest Inventory (NFI) turned from a periodic into an annual measurement design in which only one-ninth of the overall sample of permanent plots is measured every year. The reduction in sample size due to the implementation of the annual design results in an unacceptably large increase in variance when using the standard simple random sampling estimator. Thus, a flexible estimation procedure using two- and three-phase regression estimators is presented with a special focus on utilizing updating techniques to account for disturbances and growth and is applied to the second and third Swiss NFIs. The first phase consists of a dense sample of systematically distributed plots on a 500 m × 500 m grid for which auxiliary variables are obtained through the interpretation of aerial photographs. The second phase is an eightfold looser subgrid with terrestrial plot data collected from the past inventory, and the third and final phase consists of the three most recent annual subgrids with the current state of the target variable (stem volume). The proposed three-phase estimators reduce the increase in variance from 294% to 145% compared with the estimator based on the full periodic sample while remaining unbiased.

scholarly journals Das Schweizerische Landesforstinventar aus Sicht einiger Kantone (Essay)

2011 ◽  
Vol 162 (9) ◽  
pp. 282-289
Author(s):  
Robert Häfner ◽  
Ulrich Hug ◽  
Riet Gordon ◽  
Davide Bettelini ◽  
Hermann Hess
Keyword(s):  
Public Interest ◽  
Forest Inventory ◽  
National Forest Inventory ◽  
Continuous Method ◽  
Forest Planning ◽  
National Forest ◽  
The Past ◽  
Forest Enterprises ◽  
Set Up ◽  
Sound Data

The Swiss National Forest Inventory from the perspective of some cantons (essay) Politicians and the general public rightfully expect the forest services to be able to provide information about the state of the forest and to base their policies on sound data. Public interest in the forest and expectations that it will provide certain services are today focussing more on superordinate, regional spatial units. Information above the level of the forest enterprise is becoming increasingly more important and the duties of the forest services have expanded beyond those associated with single forest enterprises. The Swiss National Forest Inventory (NFI) was set up as a national instrument, but is also relevant for the cantons. So far, three inventories have been carried out and the fourth is underway. The cantonal NFI findings have become more relevant during the past 25 years. But what has the NFI really achieved for the cantons? What are its strengths and weaknesses? What risks does the fourth NFI entail with its new, continuous method of data collection and what opportunities does it offer? These questions are addressed here by the authors, who are responsible for forest planning and for contact with the NFI, in the cantons of Aargau, Bern, the Grisons, Ticino and Zurich. The authors work in cantons that have always made above average use of the NFI. All apart from Ticino have made the NFI sampling grid more dense by adding more sampling plots. For these cantons, the NFI has become an indispensable source of basic information. This article does not, therefore, provide a representative picture of how the cantons make use of the NFI, but rather reflects how the NFI could potentially serve the cantons.

Applying the concept of wilderness character to national forest planning, monitoring, and management

2008 ◽  
Author(s):  
Peter Landres ◽  
Mary Beth Hennessy ◽  
Kimberly Schlenker ◽  
David N. Cole ◽  
Steve Boutcher
Keyword(s):  
Forest Planning ◽  
National Forest ◽  
National Forest Planning

Steigende Bestandszahlen bei Spechten und anderen Vogelarten dank Zunahme von Totholz? | An increase in the population of woodpeckers and other bird species thanks to an increase in the quantities of deadwood?

2009 ◽  
Vol 160 (11) ◽  
pp. 334-340 ◽  
Author(s):  
Pierre Mollet ◽  
Niklaus Zbinden ◽  
Hans Schmid
Keyword(s):  
Forest Inventory ◽  
Bird Species ◽  
National Forest Inventory ◽  
Population Increase ◽  
National Forest ◽  
Forest Species ◽  
Breeding Populations ◽  
Willow Tit ◽  
Middle Spotted Woodpecker ◽  
Important Habitat

Results from the monitoring programs of the Swiss Ornithological Institute show that the breeding populations of several forest species for which deadwood is an important habitat element (black woodpecker, great spotted woodpecker, middle spotted woodpecker, lesser spotted woodpecker, green woodpecker, three-toed woodpecker as well as crested tit, willow tit and Eurasian tree creeper) have increased in the period 1990 to 2008, although not to the same extent in all species. At the same time the white-backed woodpecker extended its range in eastern Switzerland. The Swiss National Forest Inventory shows an increase in the amount of deadwood in forests for the same period. For all the mentioned species, with the exception of green and middle spotted woodpecker, the growing availability of deadwood is likely to be the most important factor explaining this population increase.

scholarly journals Exploring the Use of Ecosystem Services Conceptual Models to Account for the Benefits of Public Lands: An Example from National Forest Planning in the United States

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 267
Author(s):  
Lydia Olander ◽  
Katie Warnell ◽  
Travis Warziniack ◽  
Zoe Ghali ◽  
Chris Miller ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Ecosystem Service ◽  
Management Strategies ◽  
Public Lands ◽  
The United States ◽  
Forest Planning ◽  
National Forest ◽  
Planning Team ◽  
National Forest Planning

A shared understanding of the benefits and tradeoffs to people from alternative land management strategies is critical to successful decision-making for managing public lands and fostering shared stewardship. This study describes an approach for identifying and monitoring the types of resource benefits and tradeoffs considered in National Forest planning in the United States under the 2012 Planning Rule and demonstrates the use of tools for conceptualizing the production of ecosystem services and benefits from alternative land management strategies. Efforts to apply these tools through workshops and engagement exercises provide opportunities to explore and highlight measures, indicators, and data sources for characterizing benefits and tradeoffs in collaborative environments involving interdisciplinary planning teams. Conceptual modeling tools are applied to a case study examining the social and economic benefits of recreation on the Ashley National Forest. The case study illustrates how these types of tools facilitate dialog for planning teams to discuss alternatives and key ecosystem service outcomes, create easy to interpret visuals that map details in plans, and provide a basis for selecting ecosystem service (socio-economic) metrics. These metrics can be used to enhance environmental impact analysis, and help satisfy the goals of the National Environmental Policy Act (NEPA), the 2012 Planning Rule, and shared stewardship initiatives. The systematic consideration of ecosystem services outcomes and metrics supported by this approach enhanced dialog between members of the Forest planning team, allowed for a more transparent process in identification of key linkages and outcomes, and identified impacts and outcomes that may not have been apparent to the sociologist who is lacking the resource specific expertise of these participants. As a result, the use of the Ecosystem Service Conceptual Model (ESCM) process may result in reduced time for internal reviews and greater comprehension of anticipated outcomes and impacts of proposed management in the plan revision Environmental Impact Statement amongst the planning team.

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