To determine the vegetation class for each scrub-jay detection, we overlaid detection points on top of the NLCD
raster file and noted the number of detections that fell within juniper-oak woodland and shrub-scrub plains classification.
This article uses Poisson generalized linear models (GLMs) to establish statistical associations between building-related attributes commonly found in parcel data and variables derived from the NLCD
for Boulder County, CO.
In Detroit, the 2009 satellite-derived LST image--corrected for atmospheric effects and spatial variations in emissivity--as well as the SI image from the 2006 NLCD
might be suitable to represent air temperature variability between sites for heat exposure studies in the region or for targeting heat-health interventions.
0 to quantify the percent cover of each of the four NLCD
cover types (urban/developed, forest/shrub, grassland/pasture/ hay, and cropland) within a 0.
2]) MILLDEN Sawmill survey Land cover and land use Tree canopy (%) CANOPY NLCD
, percent canopy Impervious surface (%) ISA NLCD
, percent impervious Developed (%) DEVELOP NLCD
, land cover Farmland (%) FARM NLCD
, land cover Open water (%) WATER NLCD
, land cover Urban land (%) URBAN USGS, urban land Population density (people [mi.
The source dataset was converted from a vector format to a 30-meter resolution raster dataset for comparison to the GIRAS and NLCD
We used robust Poisson models to estimate prevalence ratios (Deddens and Petersen 2008) for the cooccurrence of two dichotomous heat risk-related measures: whether at least half of a subpopulation of a census block group lived in census blocks with no tree canopy reported in the NLCD
and at least half of a subpopulation of a census block group lived in census blocks with at least 50% impervious surface.
release of newer versions of the NLCD
for comparison with 2001 NLCD
), the relative error in these estimates may be smaller relative to the magnitude of changes that have occurred over this longer time period.
Among GAP, NLCD
and NOAA-C-CAP data, the use of NOAA-C-CAP data resulted in least error at all scales of analysis.
Land cover data can be measured from several remotely-sensed data sources; we used aerial photographs and the NLCD
in our study.
The selected methods are applicable to any locale within the United States by analysts with basic GIS and statistical skills using readily obtainable data: Census 2000 demographic data, 2000 TIGER files, and NLCD
In the 2001 NLCD
land cover data, many rural and suburban roads are classified as developed open space.