VEGA-GEOGLAM

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Summary

The arable land mapping method is developed based on multi-year time series of Moderate Resolution Imaging Spectroradiometer (MODIS) data. The method exploits differences between the intra- and interannual changes in the spectral reflectance of arable land and the corresponding changes for other land cover types. It involves a set of satellite data-derived phenological metrics generated using a 6 years long time series of the perpendicular vegetation index (PVI). The approach utilizes the Locally Adaptive Global Mapping Algorithm (LAGMA), which is a supervised classification technique accounting for the spatial variability of intra-classes spectral properties.

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General metadata

TerraNorte Arable Lands product is distributed in a ZIP archive named as following: alrus_[PRJ]_[AABB]_[R][U]_v[X]_[F].zip

Erdas Imagine data files:

alrus_[PRJ]_[AABB]_[R][U]_v[X].img  &  alrus_[PRJ]_[AABB]_[R][U]_v[X].rrd

Binary file:

alrus_[PRJ]_[AABB]_[R][U]_v[X].bin

Product and filename nomenclature:

PRJ	map projection, one of the following: SIN – Sinusoidal, WGS 84 GEO – Geographical(Lat/Lon), WGS 84
AA	start of 6-year interval (2 digits)
BB	end of 6-year interval (2 digits)
R	product spatial resolution
U	map units ("m" for meters and "deg" for degrees)
X	version number
F	file format ("img" for ERDAS and "bin" for BINARY)

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Map details for SIN

	Upper Y 7783653.63766 m
Left X 1111950.51966  m		Right X 11119273.540309 m
	Lower Y 4448033.735025 m

Note: these values are associated with the center of the pixel.

Datum/spheroid	WGS84
Pixel size	231.656358 m
Width (cols)	43200
Height (rows)	14400
Bits	1 bit for IMG 8 bit for BIN

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Map details for Lat/Lon

	Upper Y 65.0
Left X 19.0		Right X 144.5
	Lower Y 41.0

Note: these values are associated with the center of the pixel.

Datum/spheroid	WGS84
Pixel size	0.002 deg
Width (cols)	62750
Height (rows)	12000
Bits	1 bit for IMG 8 bit for BIN