Description: Every summer since 1947, an insect and disease aerial detection survey has been flown of all the forested acres of Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WADNR with two different flight observers each sketching a two mile swath out their side of the plane. Historically, this was recorded on a paper map, but since the 2000 season, a digital system has been used. This system consists of a laptop computer linked to a touch screen and a GPS unit. An onscreen icon tracks the location of the aircraft centered on electonic imagery projected on the touchscreen. Recent enhancemants of the imagery to false color satelite images make placement and extent of polygons generally more accurate. The primary mission of the survey is to record recently killed and currently defoliated groups of trees throughout the state, and to continually build a historical record of these trends. The vast majority of damage found is caused by insect and disease damage agents; however, trees killed by early spring feeding of black bears or by events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and so a one year lag time results. Since only this distinctive color or "signature" of the tree can be seen. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. Example: When bear damage is spotted while surveying, a polygon is drawn on the map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e. Bear) and the number of trees affected rounded to the nearest five. No vertical data is recorded.
Description: Every summer since 1947, an insect and disease aerial detection survey has been flown of all the forested acres of Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WADNR with two different flight observers each sketching a two mile swath out their side of the plane. Historically, this was recorded on a paper map, but since the 2000 season, a digital system has been used. This system consists of a laptop computer linked to a touch screen and a GPS unit. An onscreen icon tracks the location of the aircraft centered on electonic imagery projected on the touchscreen. Recent enhancemants of the imagery to false color satelite images make placement and extent of polygons generally more accurate. The primary mission of the survey is to record recently killed and currently defoliated groups of trees throughout the state, and to continually build a historical record of these trends. The vast majority of damage found is caused by insect and disease damage agents; however, trees killed by early spring feeding of black bears or by events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and so a one year lag time results. Since only this distinctive color or "signature" of the tree can be seen. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. Example: When bear damage is spotted while surveying, a polygon is drawn on the map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e. Bear) and the number of trees affected rounded to the nearest five. No vertical data is recorded.
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Every summer since 1947, an insect and disease aerial detection survey has been flown of all the forested acres of Washington state (except where noted in the digital data by large 'NF' (not flown) areas). Survey was not flown in 202 due to COVID pandemic. This survey is a cooperative effort between the U.S. Forest Service and the WADNR with two different flight observers each sketching a two mile swath out their side of the plane. Historically, this was recorded on a paper map, but since the 2000 season, a digital system has been used. This system consists of a laptop computer linked to a touch screen and a GPS unit. An onscreen icon tracks the location of the aircraft centered on electonic imagery projected on the touchscreen. Recent enhancemants of the imagery to false color satelite images make placement and extent of polygons generally more accurate. The primary mission of the survey is to record recently killed and currently defoliated groups of trees throughout the state, and to continually build a historical record of these trends. The vast majority of damage found is caused by insect and disease damage agents; however, trees killed by early spring feeding of black bears or by events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and so a one year lag time results. Since only this distinctive color or "signature" of the tree can be seen. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. Example: When bear damage is spotted while surveying, a polygon is drawn on the map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e. Bear) and the number of trees affected rounded to the nearest five. No vertical data is recorded.</SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>Every summer for the past seventy-five years, an insect and disease aerial detection survey has been flown of all the forested acres of Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WADNR with two different flight observers each sketching a two-mile swath out either side of the plane. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of these trends. The vast majority of damage found is caused by insect and disease damage agents; however, trees killed by early spring feeding of black bears or by events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and so a one year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. For example, when bear damage is spotted while surveying, a polygon is drawn on the map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., Bear) and the percentage of trees affected within five damage severity categories. No vertical data is recorded.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Every summer for the past seventy-six years, an insect and disease aerial detection survey has been flown over all forested acres in Washington state (except where noted in the digital data by large 'NF' (not flown) areas). This survey is a cooperative effort between the U.S. Forest Service and the WDNR where two trained aerial surveyors sit on either side of a high-wing plane and sketch forest damage observed below. The primary mission of the survey is to record recently killed and defoliated groups of trees throughout the state, and to continually build a historical record of forest health trends. The majority of damage found is caused by insect and disease damage agents; however, trees killed by root disease and early spring feeding of black bears, or by abiotic events such as winter storms, fires, floods and landslides are recorded as well. Current defoliation can be detected as soon as the affected foliage changes color that year. However, whole tree mortality is not current since only flagged trees (i.e., trees which have a bright red, orange, or yellow foliage color) are recorded. This means that trees killed the year of the survey will not have changed color yet and a one-year lag time results. Only trees exhibiting distinctive colors or "signatures" are documented. For example, when bark beetle damage is spotted while surveying, a polygon is drawn on a digitized map of the size and location of the damage. The polygon is then labeled with the appropriate damage agent (i.e., code: 8 for Western pine beetle) and the percentage of trees affected within five damage severity categories. It is an educated guess as to the causal agent. We therefore use ground surveys to reinforce our estimates as much as possible. No vertical data is recorded.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Service Item Id: 83a2b4061fb94d539b7c9693e1f9381a
Copyright Text: This data is a result of a cooperative effort between USDA Forest Service, Region 6, Forest Health Protection and the Washington State Department of Natural Resources, Forest Resilience Division, Forest Health.
Layer Credit: Isaac Davis, Forest Health Specialist & Aerial Observer | isaac.davis@dnr.wa.gov | (360) 277-6738