Map of the website The contents of the site have been divided into two parts PART 1 Part   1   is   made   of   several   tabs   and   sub-tabs.   Each   of   them   is   dedicated   to   a   specific   theme   related   to   the   building of the GIS and the ecosystem of the Inner Delta of the Niger river,  in the Republic of Mali. INTRODUCTION The authors (p.30) The history of the project (p.31) VEGETATION Methodology used for ground studies and data processing (p.32) The structure of the GIS (part 1): spatial data (p.33) The structure of the GIS (part 2): thematic data( (p.34) Vegetal associations (p.35) Flora (p.36) ECOLOGY Ecological data (p.37) Soils (p.38) The relationship between the flood and vegetal associations (p.39) FLOODING The internal waterway network within the inner Delta (p.40) Floodable areas (p.41) The 3-D model for flooded areas (p.42) Analysis of the model for a 6.60m flood (p.43) Analysis of the model for a 6.21m flood (p.44) Analysis of the model for a 5.97m flood (p.45) Analysis of the model for a 5.10m flood (p.46) Analysis of the model for a 4.40m flood (p.47) Vegetal landscapes and hydrological basins (p.48) Conclusion (p.49) TOWARDS A DIGITAL  ELEVATION MODEL? Methodological suggestions (p.50) Each   theme   includes   a   scientific   summary   and   maps.   The   original   data   and   the   layers   of   spatial information provided by the ARC GIS 9.3 software are available for downloading PART 2 This   second   part   has   been   approached   differently   from   the   first   one;   each   tab   is   dedicated   to   one   theme   and shows   a   detailed   plan.   The   full   contents   for   each   theme   can   be   downloaded   as   a   pdf   document   (text   and   maps)   and an ARC GIS geodatabase (GIS Files) Populations and their territories (p.51) Flooded rice cultures (1952, 1975, 1989, 2015) in relation with soil and flooding (p.52) Pastoral infrastructures and main routes : Leyde (territories), cattle tracks and shelters. (p. 53) Fodder production in relation to animal feeding (p.54) Conclusion (p.55) The   DELMASIG   GIS   uses   a   WGS   84   UTM   zone   30   North.   Distances   are   measured   in   metres   and areas   in   hectares.   As   the   original   photo-interpretation   was   based   on   uncorrected   photo-coverage,   local distorsions of up to 500m may be found when the maps are superimposed with satellite images. Use   of   the   data   is   free,   provided   reference   is   duly   made   to   the   website   https:/   and /or   to   the   specific   documents      used   and   their   authors.   We   recommend   that   users   of   the   databases   report their projects to the following address:                                                                                                           Jérôme MARIE & Pierre HIERNAUX
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