Miškų georeferencinio pagrindo ir kvartalinių tinklo formavimo ypatumai VĮ Dubravos ekspertinės miškų urėdijos pavyzdžiu

Straipsnyje analizuojamas VĮ Dubravos eksperimentinės miškų urėdijos geodezinio tinklo ir georeferencinio pagrindo formavimo tikslumas. Identifikuoti miškų kvartalinių tinklo geodezinių matavimų ir georeferencinio pagrindo tikslumo reikalavimai. Atliktas georeferencinio pagrindo ir kvartalų tinklo taškų koordinavimo tikslumo tyrimasArticle shall analyse accuracy of the geodesic network and basis of the georeferencing formation of the state owned company "Dubravos eksperimentinė miškų ūrėdija". Requirements on the geodesic metering of the forest quarterly network and accuracy of the georeferencing formation have been identified. Comparative analysis of the coordinates of the quarterly network points has been performed. Investigation has revealed that the average difference between intersection of the quarterly network formed preliminary and intersection of the quarterly network metered geodetically shall be ± 2.90 m in the coordinate axis X and ± 2.54 m in the coordinate axis Y. Average difference between the points being measured and formed is ± 3.86 m. Upon investigation of the accurateness of the georeferencing basis, it has been noted that the average difference between the values of coordinate axis X and Y shall be ± 2.27 m and ± 2.05 m respectively, when the georeferencing basis has been formed and objects of the georeferencing basis, intersecting the square lines, have been measured geodetically. Average difference of the distances of the georeferencing basis shall be ± 3.06 m. It has been determined that average square inaccuracy of one measurement of the intersection of the quarterly network metered geodetically shall be ± 4.07 m. It has been determined that average square inaccuracy of one measurement of the intersection of the georeferencing basis metered geodetically shall be ± 3.17 m. GIS cartographic database has been prepared according to the format ERSI File Geodatabase. Dotted, lined and area layers have been formed, and data coding according to the unified coding system determined by the National Forest Survey Service has been performedVytauto Didžiojo universitetasŽemės ūkio akademij