An experimental pythonic 3Di schematisation api. Using this api, we can access, alter en write a 3Di database within python. Within the package gis tools are provided as well. Currently version 0209 of the schematisation is supported. If your 3Di database is not up to date, please use: threedi_modelchecker (0.30) --sqlite path_to_sqlite.sqlite migrate to migrate your database to version 0209.
This package is the continuation of threedi-raster-edits (0.27)
Importing the module:
>>> import threedi_edits as te
Creating a new schematisation:
>>> schema = te.ThreediEdits.from_scratch()
Basic schematisation reading:
>>> schema = te.ThreediEdits(sqlite_path, mode="read") >>> schema = te.ThreediEdits(sqlite_path, mode="memory")
Copying a schematisation:
>>> copied = schema.copy()
Writing a schematisation:
>>> schema.write(sqlite_output_path, rasters=True)
Investigate the data:
>>> cross_section_locations = schema.cross_section_locations >>> channels = schema.channels >>> print(cross_section_locations.first()) # show data of the first cross section location >>> print(schema.tables) # show all tables >>> shapely_geom = schema.channels.first().geometry.shape # retrieve the shapely geometry
Creating the grid:
>>> grid = schema.grid()
>>> cells = grid['cells']
>>> nodes = grid['nodes']
>>> lines = grid['lines']
>>> cells.write("path_to_lines.gpkg") # write cells only
>>> grid.write("path_to_grid.gpkg") # Write lines, cells and nodes
Adding a feature using a template:
>>> from te.globals import SUPPORTED_THREEDI_VERSIONS >>> from te.threedi.constants import get_version >>> templates = get_version(SUPPORTED_THREEDI_VERSIONS[0]).Templates() >>> node = templates.node >>> print(node) # show what you should fill >>> node["initial_waterlevel"] = 1 >>> node["the_geom"] = Point.from_point((1, 1)) >>> new_fid = schema.nodes.add(node)
Adding a feature using items and geometry:
>>> items = {"initial_waterlevel": 0.1, "storage_are": 0.64, "code": "x"}
>>> geometry = te.Point.from_point((1, 1))
>>> new_fid = schema.nodes.add(items=items, geometry=geometry)
Adding a feature using another feature:
>>> feature = other_schema.nodes.first() >>> new_fid = schema.add(feature)
Editing and writing rasters:
>>> schema.rasters # initialize rasters >>> dem = schema.dem >>> new_dem = dem.copy() >>> array = new_dem.array >>> array[0, 0] = 2 >>> new_dem.array = array >>> schema.dem = new_dem
For more examples:
>>> te.get_examples("example_folder")