Global soil mask map in the Google Projection system

Submitted by t.hengl on September 15, 2010 - 12:19

Global soil mask map at resolution of 5.6 km representing soil productive areas (defined as areas with LAI >0 in any of the last 10 years). This soil mask map was estimated by using the MODIS long-term series of Leaf Area Index images. The soil mask is simply all areas with LAI>0 at any time since the beginning of the MODIS monitoring project. This filter will remove all deserts, glaciers and areas with absolutely no vegetation at any time in last 10 years.

This shows that, from the total of 7200x3600 pixels in the 0.05 arcdegree world map, 20.4% can be classified as soil areas. This means that the total soil areas are about 104 millions square km. This map has been projected in the Mercator projection system used by Google Maps (also known as  "the Google projection"):

> GDALinfo("soilmask_gm.tif")

rows        4152
columns     7156
bands       1
origin.x        -20037525
origin.y        -7706400
res.x       5600
res.y       5600
ysign       -1
oblique.x   0
oblique.y   0
driver      GTiff
+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0      
       +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs
file        soilmask_gm.tif

Bounding box: Xmin=-20037525, Xmax=20036075, Ymin=-7706400, Ymax=15544800. For more info see also: soilmask. The Google projection is supported by only a limited number of GIS packages. Please consider using the FWTools to project and reproject rasters to and from the Google projection.

Global soil mask map in the Google Projection system
AttachmentSizeHitsLast download
GM.prj467 bytes9192 days 17 hours ago
soilmask_gm.zip322.71 KB3002 days 17 hours ago

In November 2008, an $18 million grant has been obtained from the Bill & Melinda Gates foundation and the Alliance for a Green Revolution in Africa (AGRA) to map most parts in Sub-Sahara Africa, and make all Sub-Saharan Africa data available. From this grant there are also funds for coordinating global efforts and for the establishment of a global consortium. Several institutions have assumed a leading role in this effort and have made substantial financial and in-kind contributions.

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