Estimated total quadratic mean diameter (QMD) - 2006

Dec 29, 2010
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Description:
The acquisition of host species distributions is a significant factor in the identification of areas at risk of mortality to a particular agent. The most readily-available forest type maps do not contain enough location-specific information for insect and disease risk assessments, in particular species' age and stocking.

Estimates for total and individual species' basal area (BA), quadratic mean diameter (QMD), stand density index (SDI), percent host composition, and predominant canopy position were developed for all 57 tree species and species groups modeled for the National Insect and Disease Risk Map.

After extensively testing various interpolation methods, the Risk Map Integration Team (RMIT) utilized a national grid of perturbed and swapped Forest Inventory and Analysis (FIA) data points to produce surface estimates of these critical forest attributes.
Data Provided By:
USDA Forest Service, Forest Health Technology Enterprise Team (FHTET)
Content date:
not specified
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Larger Works:

Title: A Multi-Criteria Framework for Producing Local, Regional, and National Insect and Disease Risk Maps
Credits: Krist, F., Sapio, F., Tkacz, B.
Publication Date: 2007
Contact Organization:
USDA Forest Service, FHTET
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Use Constraints:
The USDA Forest Service shall not be held liable for improper or incorrect use of the geospatial data described and/or contained herein. These geospatial data and related graphics are not legal documents and are not intended to be used as such. The information contained in these geospatial data is dynamic and may change over time. The geospatial data are not better than the original sources from which they were derived. The user is responsible to use the geospatial data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The USDA Forest Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these geospatial data. Any products (hardcopy or electronic) utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way, (s)he is obligated to describe the types of modifications they have performed on the hardcopy map. The user specifically agrees not to misrepresent these data sets, nor to imply that changes made were approved by the USDA Forest Service. This disclaimer applies both to individual use of the geospatial data and aggregate use with other data.
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Tags:
susceptibility, multi-criteria framework, model builder, national forest, national insect and disease risk map, nidrm, pathologist, model, usfs, spatial analyst, qmd, agent, disease, risk of mortality, host, entomologist, spatial resolution, ba, arcview, gis, basal area, arcgis, vulnerability, trees per acre, stand density index, forest health, usda forest service, grid, quadratic mean diameter, pest, fhm, sdi, forest health monitoring, tpa, geographic information systems, insect, arcinfo, risk map
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Conservation Biology Institute

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