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The Second Administrative Level Boundaries data set project (SALB) has been launched in 2001 in the context of the activities of the UN Geographic Information Working Group (UNGIWG) and has for objective to provide access to a working platform for the collection, management, visualization and sharing of sub national data and information in a seamless way from the national to the global level.

This platform is developed in collaboration with and validated by the National Mapping Agencies (NMA) of each UN Member State and results in a database which contains:

• National Mapping Agencies contact information,

• Coded historic changes starting from 1990 for the 1st sub national level and from 2000 for the 2nd sub national level,
• Seamless GIS maps corresponding to the different situations observed since January 2000.

Copyright of the SALB dataset (codes and digital maps) is vested in the UN. The owner of the data agrees on the use, reproduction, distribution, display, publication and dissemination at no cost to third parties of the SALB dataset, in any manner and in any form whatsoever, subject to the copyright and acknowledgement mentioned in the metadata. It is prohibited to change the contents of the database without consent of the owner. Request for permission should be directed to the following address: SALB@un.org. The SALB dataset is for non-commercial purposes only. 

Due to the difference in the quality of the documents compiled, the digital maps part of the dataset are more adapted for thematic mapping than for precise location or modeling. It is therefore recommended not to use this data at a scale below 1:1'000'000.  

Please consult the project overview page for more information regarding the standards, methods and processes used as well to get an update on the state of progress and future of the project.