Abstract
The estimation of area change between two FIA inventories is complicated by the "mapping" of subplots. Subplots can be subdivided or mapped into forest and nonforest conditions, and forest conditions can be further mapped based on distinct changes in reserved status, owner group, forest type, stand-size class, regeneration status, and stand density. The boundaries of these mapped conditions may change from one inventory to the next, resulting in complex geometries when the two sets of boundaries are combined. The SUBP_COND_CHNG_MTRX (CMX) table was added in version 4.0 of the FIADB to "facilitate the tracking of area change" between annual inventories. The AreaChangeReports form (located within downloadable FIADB Microsoft Access databases) uses the CMX table to link remeasurement plots from two successive annual inventories to produce estimates of area change. An example is provided to illustrate shifts in land use over a 5-year remeasurement period. FIADB databases for each of the 48 contiguous states and southeast Alaska, along with built-in reporting tools including the AreaChangeReports form, are available for downloading from the FIADB DataMart (http://apps.fs.fed.us/fiadb-downloads/datamart.html) as Microsoft Access 2007
TM databases.
Parent Publication
Keywords
statistics,
estimation,
sampling,
modeling,
remote sensing,
forest health,
data integrity,
environmental monitoring,
cover estimation,
international forest monitoring
Citation
Miles, Patrick D.; Hansen, Mark H. 2012. Area change reporting using the desktop FIADB. In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. CD-ROM : 79-82.
