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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

GIS & Spatial Analysis

Detection Surveys

The Cooperative Forestry Assistance Act of 1978, As Amended Through 2008, Section 8, [16 U.S.C. 2104] FOREST HEALTH PROTECTION, authorizes the Forest Service to "conduct surveys to detect and appraise insect infestations and disease conditions and man-made stresses affecting trees and establish a monitoring system throughout the forests of the United States to determine detrimental changes or improvements that occur over time, and report annually concerning such surveys and monitoring".

Detection surveys are the primary method of collecting data on the health of treed areas affected by insects and diseases. This process involves conducting annual aerial and ground surveys using Digital Mobile Sketch Mapping (DMSM) systems. Geospatial data collected with DMSM is stored in a National Insect and Disease Survey (IDS) database and will be accessible in 2017 from our Forest Health Protection Mapping and Reporting Portal. Annual damage summaries are available from Insect and Disease Detection Survey Maps, Summaries and National Conditions Reports.

Detection surveys are an efficient and economical method of collecting and reporting data on forest insects, diseases, and other disturbances across State, Private and Federal lands. FHTET supports over 120 cooperating users and 10 Forest Service Regions each field season with detection surveys. Cooperators are the key to ensuring consistent coverage and quality of the detection data.

Insect and Disease Detection Survey Annual Summary Maps

2018 Insect and Disease Detection Survey Map
Insect and Disease Detection Survey Maps

Insect & Disease Detection Survey (IDS) Data Downloads

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Read reports about forest insect and disease conditions in the United States. The reports focus on the 20 major insects and diseases that annually cause defoliation and mortality in forests of the United States.

Insect and Disease Detection Survey Acre Summaries

2000-2018 Areas with Tree Mortality from Bark Beetles in the Western United States