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1.4 Global Map Dataset 
Outline of the dataset: The Global Map is digital geospatial 
dataset of the whole land area of the globe at a scale of 1 to 
1,000,000 (or in 30 arc seconds resolution) and has eight 
thematic layers, namely, boundaries, drainage, population 
centers, transportation, elevation, land use, land cover, and 
vegetation (percent tree cover). The former four layers are in 
vector format, while the latter four layers are in raster. The data 
are stored in the geographic coordinate with the GRS80 
cllipsoid and the ITRF94 system. All the data are developed on 
the basis of the Global Map Specifications whose latest version 
is 2.1 adopted in 2011. The vector layers are made available 
both in GML and shape file formats, and raster layers are in the 
BIL and TIFF formats. 
    
  
  
  
  
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Figure 2: Eight layers of Global Map 
  
Progress: As of April 1, 2012, the Global Map datasets of 79 
countries/regions have been released. Furthermore, the Global 
Land Cover and Vegetation, created by using MODIS data 
observed in 2003, were released in 2008 as part of Global Map 
Version 1. 
  
    
   
  
   
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Figure 3: Progress of Data Development 
The development of the Global Map Version 1 was terminated 
in 2008 with the release of the Global Map Version 1 datasets 
of more than 70 countries/regions, the Global Land Cover and 
the Global Vegetation. As the Global Map is to be updated 
every five years to monitor the changes of the environment, the 
NMOs have been working to develop the Global Map Version 
2 by 2013. 
Data policy: Although all participating countries share the 
basic policy, i.e., the Global Map data are released free of 
charge for non-commercial purposes, the data policies of Global 
Map datasets differ from country to country as they are 
determined by NMOs that have developed the data. Each 
dataset is subject to copy right protection. The data users 
confirm data policy when they download the data from the 
Internet. 
2. DEVELOPMENT OF GLOBAL MAP DATA 
2.1 Global Map Specifications and Their Revision 
Global Map Specifications: The Global Map Specifications 
define the Global Map itself, including the structure, attributes, 
metadata and format of the dataset, which give common 
understanding of the dataset to the data users and developers. 
The Specifications have been used to develop Global Map 
datasets of many countries after the first release in 2000. 
Revision of the Specifications: Since some parts needed to be 
updated after the development of the Global Map Version 1 
based on the specification Version 1, the Global Map 
Specifications were revised and updated to Version 2 in 2009. 
For the revision, ISCGM Secretariat conducted several surveys 
and held a workshop to collect comments from users and 
NMOs. The main points of the revision were the followings: 
1) Modifications of the Data Dictionary, 
2) Change of vector format from VPF to GML (ISO19136), 
3) Change of file coverage to be provided by countries, and 
4) Change of metadata format to be compliant to ISO19115. 
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