GIS & Spatial Statistics
in the FIA
GIS (geographic information systems) and spatial statistics has
been used in many different ways in the FIA. Analyses that are
amenable to GIS analysis include area measurements, suitability
studies, proximity measures, and spatial simulations. For example,
one analysis we have used is to compare the FIA plot data with GIS
coverages of elevation (digital elevation models, or DEMs). We
can then use the relationship we've defined between topography and
forest characteristics to improve our spatial estimation procedures.
Key Concepts in Use
Geostatistics The use of inventory
data in a spatial context for analysis with other spatially referenced
data by use of statistical methods.
Examines the role landscape patterns have on forest composition
Photo Interpreted Maps These images
show the distibution of various landscape characteristcs at the
state level from photointerpreted images.
Remote Sensing The use and interpretation
of imagery by airborne sensors to help in the analysis of forest
Species Importance Maps These
maps are representations of our predictions of species importance
at the state level.
Access to data
Map Maker Online site that allows the retrieval or display
of FIA data.
Downloads Online site that allows download of FIA data
of FIA data.
Spatial Data Center Allows access to FIA data without compromising
the security of the plot locations or land owner privacy.
For a link to GIS coverages of timber mill locations on the
East Coast, please go to the site of the Southern
Research Station's Economics Research Unit.
presented in the spring of 2000. This workshop focused on the how
to use geostatistics with FIA data to get viable products. Start