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Journal Details
Format
Journal
eISSN
2454-0358
ISSN
0323-1046
First Published
14 Dec 2009
Publication timeframe
4 times per year
Languages
English

Search

Volume 59 (2013): Issue 1 (March 2013)

Journal Details
Format
Journal
eISSN
2454-0358
ISSN
0323-1046
First Published
14 Dec 2009
Publication timeframe
4 times per year
Languages
English

Search

2 Articles
Open Access

New view of properties and applicability of the circular and relascopic sample plots for the inventory and monitoring of the forest ecosystems

Published Online: 17 Aug 2013
Page range: 1 - 18

Abstract

In the paper, dendrometric and biometric properties of four types of sample plots (size-constant, sizevariable, concentric circles, and relascope method) are comprehensively analyzed. Their possibilities to fulfil new demands for inventories, especially with respect to aims, information spectrum, the precision of results, economic efficiency and time-based comparability of results, which have being imposed during the last years, are reviewed as well. Experimental data obtained from up-to-now research of the author as well as from the computer simulations of model forest stands and direct field measurements in forest stands having diverse structure served as the base for this study. All types of sample plots were established in the same number and in the same location of the same forest stands, which ensures its maximum comparability. The data are processed, generalized and tested by using the adequate mathematical-statistical methods. The results provide proposals for optimal application of the studied types of sample plots in the planning and performance of sample-based forest inventories at the stand, regional as well as the national level. The above-mentioned procedures are an important part of the methodology and decision making and it cannot be performed in the same way for different level or region (locality). They are to be performed with regard to the forest structure, demands for information spectrum as well as to available financial resources.

Keywords

  • circle sample plots size-constant
  • size-variable and concentric
  • relascope sampling
  • comparison of their properties
  • practical applicability
  • algorithms for data processing and result generalization

Kľúčové slová

  • kruhove skusne plochy konštantne
  • variabilne a koncentricke
  • relaskopicka metoda
  • porovnanie ich vlastnosti
  • prakticka použiteľnosť
  • algoritmy na spracovanie a zovšeobecňovanie vyberovych udajov
Open Access

Innovative approaches in mapping and assessing the structure and texture of mountain forest stands in Low Tatras.

Published Online: 17 Aug 2013
Page range: 19 - 37

Abstract

The work addresses the thematic mapping and assessments of the forest stand structures based on a combination of remote sensing and terrestrial methods using geographic information systems (GIS). Building on our previous research, we present the results on thematic mapping of the sets of stand types in the model area Lomnista Valley in the Low Tatras (1 623 ha), structural types and elements, classification of structure and ecological stability of mountain forests in the localities Konštiaky, Široky uplaz, Martaluzka - Byčiarky in the Low Tatras covering 270 ha. In the locality Medvedia uboč in Lomnista Valley with the communities of natural forests in the fir-beach altitudinal vegetation zone, the innovative methods of thematic mapping of stand structure types and segments, based on RS, GIS, segmentation methods and mobile technologies, are presented. Stand texture types, elements and segments were identified, localized and partially classified on orthorectified digital multispectral aerial scenes combined with SPOT satellite scene. Historical aerial panchromatic images from the years 1949, 1971 and 1992 were used for interpretation of tendencies and trends in different types of stand textures. Spatial classification was established on the method of image segmentation. In the field, the total 98 segments at higher level covering 63 ha were localized and characterized in detail. A detailed descriptive system of the habitat, conservation, species, spatial and age structure of the segments was used. Research plots, detailed biometrically measured by FieldMap technology, were used as training plots for classification with RS data and as the calibration objects in a spatial description of the segments in the field. The presented approaches were verified in several model localities with the possibility of generalization for the entire range of forest communities in Slovakia. A multimedia system with records from the interior and exterior of typical stand structures and textures has been als o implemented.

Keywords

  • forest structure and texture
  • segmentation
  • thematic mapping
  • classification
  • remote sensing
  • multimedia records

Kľúčové slová

  • štruktura a textura lesa
  • segmentacia
  • tematicke mapovanie
  • klasifikacia
  • DPZ
  • multimedialne zaznamy
2 Articles
Open Access

New view of properties and applicability of the circular and relascopic sample plots for the inventory and monitoring of the forest ecosystems

Published Online: 17 Aug 2013
Page range: 1 - 18

Abstract

In the paper, dendrometric and biometric properties of four types of sample plots (size-constant, sizevariable, concentric circles, and relascope method) are comprehensively analyzed. Their possibilities to fulfil new demands for inventories, especially with respect to aims, information spectrum, the precision of results, economic efficiency and time-based comparability of results, which have being imposed during the last years, are reviewed as well. Experimental data obtained from up-to-now research of the author as well as from the computer simulations of model forest stands and direct field measurements in forest stands having diverse structure served as the base for this study. All types of sample plots were established in the same number and in the same location of the same forest stands, which ensures its maximum comparability. The data are processed, generalized and tested by using the adequate mathematical-statistical methods. The results provide proposals for optimal application of the studied types of sample plots in the planning and performance of sample-based forest inventories at the stand, regional as well as the national level. The above-mentioned procedures are an important part of the methodology and decision making and it cannot be performed in the same way for different level or region (locality). They are to be performed with regard to the forest structure, demands for information spectrum as well as to available financial resources.

Keywords

  • circle sample plots size-constant
  • size-variable and concentric
  • relascope sampling
  • comparison of their properties
  • practical applicability
  • algorithms for data processing and result generalization

Kľúčové slová

  • kruhove skusne plochy konštantne
  • variabilne a koncentricke
  • relaskopicka metoda
  • porovnanie ich vlastnosti
  • prakticka použiteľnosť
  • algoritmy na spracovanie a zovšeobecňovanie vyberovych udajov
Open Access

Innovative approaches in mapping and assessing the structure and texture of mountain forest stands in Low Tatras.

Published Online: 17 Aug 2013
Page range: 19 - 37

Abstract

The work addresses the thematic mapping and assessments of the forest stand structures based on a combination of remote sensing and terrestrial methods using geographic information systems (GIS). Building on our previous research, we present the results on thematic mapping of the sets of stand types in the model area Lomnista Valley in the Low Tatras (1 623 ha), structural types and elements, classification of structure and ecological stability of mountain forests in the localities Konštiaky, Široky uplaz, Martaluzka - Byčiarky in the Low Tatras covering 270 ha. In the locality Medvedia uboč in Lomnista Valley with the communities of natural forests in the fir-beach altitudinal vegetation zone, the innovative methods of thematic mapping of stand structure types and segments, based on RS, GIS, segmentation methods and mobile technologies, are presented. Stand texture types, elements and segments were identified, localized and partially classified on orthorectified digital multispectral aerial scenes combined with SPOT satellite scene. Historical aerial panchromatic images from the years 1949, 1971 and 1992 were used for interpretation of tendencies and trends in different types of stand textures. Spatial classification was established on the method of image segmentation. In the field, the total 98 segments at higher level covering 63 ha were localized and characterized in detail. A detailed descriptive system of the habitat, conservation, species, spatial and age structure of the segments was used. Research plots, detailed biometrically measured by FieldMap technology, were used as training plots for classification with RS data and as the calibration objects in a spatial description of the segments in the field. The presented approaches were verified in several model localities with the possibility of generalization for the entire range of forest communities in Slovakia. A multimedia system with records from the interior and exterior of typical stand structures and textures has been als o implemented.

Keywords

  • forest structure and texture
  • segmentation
  • thematic mapping
  • classification
  • remote sensing
  • multimedia records

Kľúčové slová

  • štruktura a textura lesa
  • segmentacia
  • tematicke mapovanie
  • klasifikacia
  • DPZ
  • multimedialne zaznamy

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