Seismic Fold Db GIS

module to load calculated fold from CSV file to GIS database

1. Dependencies:

   SQLAlchemy>=1.3.22
   GeoAlchemy2>=0.8.4
   

2. CSV format

   • first line is header
   • comma separated
   • columns order: 'Easting', 'Northing', 'Fold', 'Bin Number', 'Row', 'Column'

3. DB engine connection

   • SQLite with spatial extension

     def load_spatialite(dbapi_conn, connection_record):
         dbapi_conn.enable_load_extension(True)
         dbapi_conn.load_extension('/usr/lib/x86_64-linux-gnu/mod_spatialite.so')
     
     db_file = '/some_folder/fold.sqlite'
     engine = create_engine('sqlite:///' + db_file, echo=True)
     

   • PostgreSQL with PostGIS extension

     engine = create_engine('postgresql://user:password@db_host/db_fold')
     

4. Usage:

   engine = create_engine('postgresql://user:password@db_host/db_fold')
   
   fold = FoldDbGis(engine)
   fold.create_table()
   
   # to load fold file to empty db
   fold.load_from_csv(csv_file1)
   
   # to update db with fold file that do not overlap previously loaded data
   fold.load_from_csv(csv_file2)
   
   # to update db with fold file that overlaps with previously loaded data (i.e. two adjacent zippers)
   fold.update_from_csv(csv_file3)