Added Kojusalas grāvis, current situation since 1970s

Added a road overpass, a synagogue, some start and end dates

Updated start_date of building

Fixed intersecting buildings, united Melngalvju nams as one building, removed unnecessary names.

Updated canal placement

Updated geometry to fix intersecting buildings. Removed generic names. Updated data for St. Peter's Church (from Wikipedia).

Adjusted placement of buildings to fix overlap. Corrected start_date for St. Peter's.

Added data for buildings in cadastral group 001 using open data

Updated deprecated tags for the city canal. Added missing city canal area.