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Tools for downloading results for 3Di scenarios

Project description


The threedi-scenario-downloader package includes functions in order to automate most used download actions on the 3Di results.

Example methods are:

  • Download raw results.

  • Download logging.

  • Download maximum waterdepth (non-temporal raster).

  • Download waterdepth (temporal raster, supply timestamp for snapshot).

  • Find all scenarios model slug or scenario name.


Start importing the package:

>>> from threedi_scenario_downloader import downloader as dl

Set the API key for authentication to the Lizard API (you can get an API key here: <your portal>

>>> dl.set_api_key("INSERT YOUR API KEY HERE")

Find scenarios based on a model slug (unique model identifier) or scenario name. Returns last 10 matching results unless told otherwise:

>>> scenarios = dl.find_scenarios_by_model_slug("enter your model_uuid", limit=10)


>>> scenarios = dl.find_scenarios_by_name("my_first_scenario", limit=100)

or if you have too many similarly-named scenarios, do a case-sensitive exact search:

>>> scenarios = dl.find_scenarios_by_exact_name("my_first_scenario", limit=100)

Do you want to download the raw 3Di-results (.nc and .h5 files) of a specific scenario? Use the following methods:

>>> dl.download_raw_results("scenario_uuid")
>>> dl.download_grid_administration("scenario_uuid")


>>> dl.download_raw_results("scenario_uuid",pathname="")
>>> dl.download_grid_administration("scenario_uuid",pathname="save_under_different_name.h5")

Downloading (temporal) rasters of specific scenarios can be done using the following methods:

>>> dl.download_maximum_waterdepth_raster("scenario_uuid",projection="EPSG:28992",resolution=10)
#download the full extent of the maximum waterdepth of the given scenario_uuid with a 10 meter resolution in the RD New/Amersfoort projection (EPSG:28992)

>>> dl.download_waterdepth_raster("scenario_uuid",projection="EPSG:28992",resolution=10,time="2019-01-01T02:00")
#download the full extend of the waterdepth at the supplied timestamp given scenario_uuid, on 10 meter resolution in the RD New/Amersfoort projection (EPSG:28992)

The raster download methods creates a task for the API. Depending on the size and resolution it takes some time for the raster to be prepared. These methods will keep on checking if the raster is ready to be downloaded. When a raster is ready to be downloaded a message in the Lizard portal is created as well. If you want to delete these messages (due to bulk downloading for example), use the following method:

>>> dl.clear_inbox()


We can be installed with:

$ pip install threedi-scenario-downloader

Development installation of this project itself

We’re installed with regular pip and virtualenv. Create a virtualenv and call pip:

$ python3 -m venv .
$ bin/pip install -r requirements.txt

In order to get nicely formatted python files without having to spend manual work on it, run the following command periodically:

$ bin/black threedi_scenario_downloader

Run the tests regularly. This also checks with pyflakes, black and it reports coverage. Pure luxury:

$ bin/pytest

The tests used to run on, but we don’t use that service anymore. Also, new releases were automatically added to pypi there. For now, contact Reinout when you need a new release.

If you need a new dependency (like requests), add it in in install_requires. Afterwards, run install again to actuall install your dependency:

$ bin/pip install -r requirements.txt

Changelog of threedi-scenario-downloader

1.2 (2023-06-29)

  • Basic sub-endpoint added.

  • Small fixes.

  • Resolution is now guaranteed.

1.1 (2023-06-13)

  • Added support for sub-endpoints “/api/v4/scenarios/{uuid}/results/damage/” and “/api/v4/scenarios/{uuid}/results/arrival/”

  • Now added the use of keyword arguments for “resolution”, “projection”,”bbox” and “time”.

  • Bugfix with width and height

1.0 (2023-05-15)

  • Changed functions to support the Lizard API v4 (v3 is not supported with this release)

  • Added error statements for faulty API requests

0.16 (2022-09-07)

  • Added find_scenarios_by_exact_name() function that doesn’t do a case insensitive search for names containing the search term (like find_scenarios_by_name() does), but only does an exact match. Handy if there are too many similarly-named scenarios.

0.15 (2021-08-12)

  • Bump bleach to 3.1.4

0.14 (2021-08-12)

  • Added download aggregation NetCDF function

  • Added download logging function

  • Added function descriptions

  • Minor fixes

0.13 (2021-07-22)

  • Added batch functionality to raster download

  • Added resume batch function

0.12 (2020-02-18)

  • Adaptation for improved feedback from Lizard API task endpoint

0.11 (2019-06-03)

  • Updated find_scenarios method. Use ‘name’ argument for exact searches and ‘name__icontains’ for partial searches

0.10 (2019-05-27)

  • Increased download chunk size

  • Added bounds_srs as optional argument to define the spatial reference system the bounds are supplied in

0.9 (2019-05-22)

  • Updated download method using stream

  • Updated urllib3 dependency

0.8 (2019-03-14)

  • Bugfix in downloading total damage rasters

0.7 (2019-02-15)

  • Added temporal rasters with interval

  • Retrieve grouped (static, temporal) download links from scenario

0.6 (2019-02-13)

  • Added method for downloading raw 3Di result

  • Added method for downloading gridadmin

  • Added authentication method for downloading files from Lizard API

0.5 (2019-02-13)

  • Cleanup of docstrings and usage of request parameters

  • Make result-limit changable

  • Added url retrieval methods

  • Added editable result limit on searches

0.2 (2019-01-24)

0.1 (2019-01-23)

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