|
AVHRR
Global Land Cover Product
|
|
Available at:
|
http://glcfapp.umiacs.umd.edu:8080/esdi/index.jsp
|
|
Data
reference:
|
University
of Maryland,
Global Land Cover Facility (GLCF)
|
|
Available
data products:
|
|
Products
|
Global land
cover map
|
|
Scale/spatial
resolution:
|
1km, 8km, or
1 degree
|
|
Classification
system:
|
Eleven major
land cover types based on interannual
variations in NDVI
<>These types
were selected primarily to conform with the cover types required as
input to
climate models |
|
Remote
sensing data:
|
AVHRR
(1981-94)
|
|
Interpretation
process:
|
Developed on
a continent-by-continent basis, bottom-up approach
Automated
unsupervised classification procedure
Training
data and phenological metrics that
describe the temporal dynamics of vegetation over an
annual cycle
The metrics
have the potential to be used as input variables to a global land cover
classification
|
|
Projection:
|
Geographic
(Lat/Long) and Interrupted Goode Homolosine
(except for the 1 degree resolution)
|
|
Objective:
|
To develop
methodologies for global land cover classifications that are objective,
reproducible, and
feasible to
implement on data from additional years and
To produce a
global land cover classification at 1 km spatial resolution accessible
to the global
change
research community
|
|
File Format:
|
Binary, BSQ,
Ascii Grid
|
|
Data release
policy:
|
Open access
|
|
Costs:
|
For free
|
|
Validation:
|
The data set
has not been systematically validated.
|
|
Contacts:
|
John Townshend, University of Maryland
(jt59@umail.umd.edu)
|