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NACP Forest Age Maps at 1-km Resolution for Canada (2004) and the U.S.A. (2006)


DatasetNACP Forest Age Maps at 1-km Resolution for Canada (2004) and the U.S.A. (2006)
Release date2012-06-12
ProjectNorth American Carbon Program (NACP)
Time period1950-01-01 to 2006-12-31

Usage Metrics

CountEarliest DateLatest DateData Usage
Citations120152015Publications citing this dataset
Downloads14332012-06-182017-08-1513768 total files downloaded


This data set provides forest age map products at 1-km resolution for Canada and the United States (U.S.A.). These continental forest age maps were compiled from forest inventory data, historical fire data, optical satellite data, and the images from the NASA Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS) project. These input data products have various sources and creation dates as described in the source paper by Pan et al. (2011). Canadian maps were produced with data available through 2004 and U.S.A. maps with data available through 2006. A supplementary map of the standard deviations for age estimates was developed for quantifying uncertainty. Note that the Pan et al. (2011) paper is included as a companion file with this data set and was the source of descriptions in the guide. Forest age, implicitly reflecting the past disturbance legacy, is a simple and direct surrogate for the time since disturbance and may be used in various forest carbon analyses that concern the impact of disturbances. By combining geographic information about forest age with estimated carbon dynamics by forest type, it is possible to conduct a simple but powerful analysis of the net CO2 uptake by forests, and the potential for increasing (or decreasing) this rate as a result of direct human intervention in the disturbance/age status.

Dataset documentation


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Crosscite Citation Formatter
Pan, Y., J.M. Chen, R. Birdsey, K. McCullough, L. He, and F. Deng. 2012. NACP Forest Age Maps at 1-km Resolution for Canada (2004) and the U.S.A. (2006). ORNL DAAC, Oak Ridge, Tennessee, USA.

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Data Files

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Data File (Granule)File SizeDatesLatitudeLongitude
sc_age06_1km.tif 884.1KB 1950-01-01 to 2006-12-31 39.20N to 24.52N81.93W to 110.23W
conus_age06_1km.tif 4.1MB 1950-01-01 to 2006-12-31 46.39N to 19.40N66.25W to 141.33W
psw_age06_1km.tif 264.3KB 1950-01-01 to 2006-12-31 44.50N to 29.98N108.73W to 130.71W
rms_age06_1km.tif 664.8KB 1950-01-01 to 2006-12-31 46.41N to 28.83N98.22W to 125.61W
se_age06_1km.tif 666.7KB 1950-01-01 to 2006-12-31 39.19N to 24.48N76.48W to 88.97W
can_age04_1km.tif 9.1MB 1950-01-01 to 2006-12-31 58.60N to 35.12N43.53W to 179.25E
nl_age06_1km.tif 407.3KB 1950-01-01 to 2006-12-31 48.46N to 40.39N76.83W to 104.09W
rmn_age06_1km.tif 284.0KB 1950-01-01 to 2006-12-31 50.83N to 40.56N102.46W to 120.59W
ca04_usak06_std_1km.tif 44.0MB 1950-01-01 to 2006-12-31 49.93N to 7.71N39.87W to 99.17E
ak_age06_1km.tif 227.4KB 1950-01-01 to 2006-12-31 67.01N to 48.42N126.11W to 163.33E
ca04_usak06_1km.tif 17.3MB 1950-01-01 to 2006-12-31 49.93N to 7.71N39.87W to 99.17E
ne_age06_1km.tif 517.2KB 1950-01-01 to 2006-12-31 46.90N to 37.56N70.94W to 83.26W
pnw_age06_1km.tif 343.5KB 1950-01-01 to 2006-12-31 50.98N to 39.26N108.96W to 133.63W
np_age06_1km.tif 429.8KB 1950-01-01 to 2006-12-31 47.91N to 34.35N76.12W to 117.04W

Companion Files

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Dataset has 2 companion files.

  • NA_Tree_Age.pdf
  • Pan_et_al_bg-8-715-2011.pdf

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