CEM How to generate tiles for leaflet basemap

create new basemap for leaflet

goal: to create leaflet basemap overlay layer

georeference a png image file

 Install QGIS from qgis.org

 Run QGIS 

     Start a new project 
         first icon with a blank paper
         load a map
                Select XYZ Tiles and OpenStreetMap and zoom to region of interest 

     Load a png that needs to be geo-referenced  
         select Layer -> georeferencer
         select open-raster and load the png file

     Mark several map coordinates 
          select 'From Map Canvas' and mark the matching location at the background map(remember to click OK)
             There will be a matching marker on the background map and georeferencer map

     Georeference and Export a tif file
          select georeferencing and exit

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