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2016 | z. 146 | 7--18
Tytuł artykułu

Assessing Accuracy of Forest Cover Information on Historical Maps

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Assessing the uncertainty of historical map information is a prerequisite for using this source type for land cover reconstructions. We assessed the accuracy of forest cover information from 1930 / 1940 Swiss topographic maps ( Siegfried maps ) by comparing them with forest cover gained from orthophotos and terrestrial photos from the same period. Orthophotos were considered to contain the true forest cover information and consequently inconsistencies between historical maps and orthophotos were considered as true errors ( overor underestimation of the forest cover on the map ). Terrestrial photos reflect the surveyors perspective in the field and we therefore used this source type to develop hypotheses on potential reasons for inaccuracy of map information. Generalized linear models were used to test the hypotheses. The results confirmed our expectation that disagreement between maps is more likely to occur near forest edges, at higher altitudes and in less accessible and visible areas. Contrary to our expectations terrain slope did not play a significant role to explain surprisingly high rates of inaccuracy occurred in forest core areas. (original abstract)
Słowa kluczowe
Twórcy
autor
  • Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
  • Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
  • Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
  • Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.ekon-element-000171455991

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