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Statewide Aerial Sketchmapping of Tree Defoliation, Mortality and other Damages: Yearly Flight Coverage Polygons, 1985 to 2014

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  • Forest Ecosystem Monitoring Cooperative

    • Address:
      705 Spear Street
      South Burlington, Vermont 05403
      United States of America

      Phone: (802) 391-4135
      Email: femc@uvm.edu
      Website: www.uvm.edu/femc

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    Aerial sketch mapping of defoliation, mortality, or other symptoms is a statewide survey conducted to detect tree damage, to determine its cause, and to maintain maps showing the location and extent of damage.

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  • Barbara Schultz: dataset_eml_peopleprincipleinvestigator

  • Dan Dillner: dataset_eml_peopleprincipleinvestigator

  • Bill Frament: dataset_eml_peoplecontentprovider

  • Ryan Hanavan: dataset_eml_peoplecontentprovider

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  • aerial survey, defoliation, spatial methods, tree mortality,

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  • dataset_eml_locationcords
    • -73.4379015767698, 42.72696000804695
    • -71.46528103507033, 42.72696000804695
    • -71.46528103507033, 45.01666491562359
    • -73.4379015767698, 45.01666491562359
    • -73.4379015767698, 42.72696000804695

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  • dataset_eml_datatabletitle: Yearly Flight Coverage Polygons, 1985 to 2014
  • dataset_eml_datatablestartdate: 1985-01-01
  • dataset_eml_datatabledescription: Spatial data (shapefiles) showing the areas that were flown over and mapped during each year

  • dataset_eml_datatablepurpose: Yearly aerial surveys of VT to determine the extent of forest pest insect, disease or physical damage of forested areas.

  • dateset_eml_datatableshortname: AreasFlown_DefoliationSurveys_1985to2014.zip

  • dataset_eml_datatablephysicalobjectname: VMC.66.318

  • dataset_eml_datatabledatatype: mySQL
  • dataset_eml_datatablecitation: Statewide Aerial Sketchmapping of Tree Defoliation, Mortality and other Damages: Yearly Flight Coverage Polygons, 1985 to 2014, 1985-01-01

  • dataset_eml_datatableonlinedistribution: https://vmc.w3.uvm.edu/vmcdevel/CI4/data/archive/project/statewide-aerial-sketchmapping-tree-defoliation-mortality/dataset/yearly-flight-coverage-polygons-1985-current

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dataset_eml_methodsheader

  • dataset_eml_currentMethodsHeader
    • Mapping tree symptoms
      • dataset_eml_methoddescription: Defoliation, mortality, or other tree symptoms are mapped from north-south flight lines 3-4 miles apart, generally flying at 120-130 mph, 1000-2000’ above the terrain. 2001-current, polygons were generally sketched onto a digital system with variable scale maps (generally 1:100,000).

    • dataset_eml_methodsUnnamed
      • dataset_eml_methoddescription: Prior to 2001, sketching was done on hardcopy maps (7-1/2’ USGS maps from the early 1990’s until 2001; 15’ USGS maps prior to 1990.)

    • Understanding cause of damage
      • dataset_eml_methoddescription: If an “unknown” damage was widespread, representative polygons were usually visited on the ground to determine the cause of damage. Otherwise, ground checking of survey results was sporadic. Most years, the entire state was surveyed at least once in August – September. During defoliator outbreak years or years of weather events, survey timing was targeted for those damages (the annual data from these years may lack chronic damages, as mappers focused on the target damage).


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  • dataset_eml_samplingCurrentEqupment
    • Fixed-wing airplane
      • dataset_eml_samplingdescription: Fixed-wing airplane. Mapping onto USGS topographic or other maps

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  • dataset_eml_sitecharacteristicsdescription: Sketchmapping surveys can cover the entire state of Vermont