<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>200</id>
    <completedYear>2021</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>13</pageLast>
    <pageNumber>13</pageNumber>
    <edition/>
    <issue>3</issue>
    <volume>55</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>2021-09-13</completedDate>
    <publishedDate>2021-06-10</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Reliability of photo-optical measurements of log stack gross volume</title>
    <abstract language="eng">In terms of assessing economic impact, one of the most important elements in the wood supply chain is the measurement of round wood. Besides the one-by-one measurement of logs, logs are often measured when stacked at the forest road. The gross stacked volume includes the volume of the wood, bark and airspace and is widely used for industrial wood assortments. The increasing international attention given to photo-optical measurement systems for portable devices is due to &#13;
their simplicity of use and efficiency. The aim of this study was to compare the gross volumes of &#13;
hardwood log stacks measured using one widespread photo-optical app with two manual section-wise  volume  estimations  of  log  stacks  based  on  the  German  framework  agreement  for  timber  trade (RVR). The manual volume estimations were done starting from the left (RVRleft) and right (RVRright) sides of the log stacks. The results showed an average deviation of the photo-optical gross volume estimation in comparison to the manual estimation of –2.09% (RVRleft) and –3.66% (RVRright) while the deviation between RVRleft and RVRright was +2.54%. However, the log stack &#13;
gross volume had a highly significant effect on the deviation and better accuracy with smaller &#13;
deviation were reached for larger log stacks. Moreover, results indicated that the gross volume estimations of higher quality log stacks were closer for the three analyzed methods compared to estimations of poor-quality log stacks.</abstract>
    <parentTitle language="eng">Silva Fennica</parentTitle>
    <identifier type="doi">10.14214/sf.10555</identifier>
    <identifier type="urn">urn:nbn:de:kobv:eb1-opus-2003</identifier>
    <identifier type="issn">2242-4075</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <licence>Creative Commons - CC BY-SA - Namensnennung - Weitergabe unter gleichen Bedingungen 4.0 International</licence>
    <author>Ferréol Berendt</author>
    <author>Felix Wolfgramm</author>
    <author>Tobias Cremer</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>logistic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photogrammetry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>timber trade</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>volume estimation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>wood pile</value>
    </subject>
    <collection role="ddc" number="634">Obstanlagen, Früchte, Forstwirtschaft</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="institutes" number="">Fachbereich Wald und Umwelt</collection>
    <collection role="Hochschulbibliographie" number=""/>
    <collection role="Hochschulbibliographie" number="">Zweitveröffentlichung</collection>
    <collection role="Hochschulbibliographie" number="">Referiert</collection>
    <thesisPublisher>Hochschule für nachhaltige Entwicklung Eberswalde</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-hnee/files/200/article10555.pdf</file>
  </doc>
  <doc>
    <id>201</id>
    <completedYear>2020</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>4</pageNumber>
    <edition/>
    <issue>3(1)</issue>
    <volume/>
    <type>workingpaper</type>
    <publisherName>MDPI</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>2021-09-13</completedDate>
    <publishedDate>2020-11-14</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Accuracy of Photo-Optical Measurement of Wood Piles</title>
    <abstract language="eng">The accurate estimation of timber volume is of the utmost importance. For industrial timber, the volume is often estimated as stacked cubic meters. In addition to manual measurements, volume estimation is possible with photo-optical systems. Over 100 piles of industrial timber of broadleaved tree species were analyzed. In the study, a standard manual measurement method for the estimation of wood pile volumes was compared with a smartphone based photo-optical application for the determination of woodpile volume. Mean gross volume of the piles was approximately 56 m3 and mean width of piles was 9.43 m. A strong correlation was found between the manual measurements and the photo-optical measurement. However, volume estimation of large volume piles seems to perform better in comparison to piles with small volumes. Further research is needed to determine the effects of variables such as log quality or quality of pile on volume estimation accuracy.</abstract>
    <parentTitle language="eng">Environmental Sciences Proceedings</parentTitle>
    <identifier type="doi">10.3390/IECF2020-08192</identifier>
    <identifier type="urn">urn:nbn:de:kobv:eb1-opus-2012</identifier>
    <identifier type="issn">2673-4931</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Tobias Cremer</author>
    <author>Ferréol Berendt</author>
    <author>Felipe de Miguel Diez</author>
    <author>Felix Wolfgramm</author>
    <author>Lubomir Blasko</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>timber stack</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>volume estimation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>logistic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>timber trade</value>
    </subject>
    <collection role="ddc" number="634">Obstanlagen, Früchte, Forstwirtschaft</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="institutes" number="">Fachbereich Wald und Umwelt</collection>
    <collection role="Hochschulbibliographie" number=""/>
    <collection role="Hochschulbibliographie" number="">Zweitveröffentlichung</collection>
    <collection role="Hochschulbibliographie" number="">Referiert</collection>
    <thesisPublisher>Hochschule für nachhaltige Entwicklung Eberswalde</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-hnee/files/201/environsciproc-03-00090-v2.pdf</file>
  </doc>
</export-example>
