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Last pushed: 3 months ago
Short Description
Generate flowmaps, videos of uv vector fields. Based on computer models or measured datasets.
Full Description


Flowmap generator

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:alt: Documentation Status

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:alt: Updates

Command line utility to transform model output into a flowmap that can be used for games or gpu-based visualizations.


Scripts that generate flowmaps for specific models:

  • (download model results for DCSM model and transform them to a flowmap)


To use the software you can download the latest version using docker.
If you have docker installed you can download the software using the command:

.. code:: bash

docker pull openearth/flowmap

you can then run all commands in docker, for example

docker run openearth/flowmap --help

You can run the software by typing the command (for now please prepend the flowmap command with /opt/conda/envs/py35/bin.

.. code:: bash


flowmap --help

help per command

flowmap generate --help

generate flowmap (for openearth/painting)

flowmap generate --src_epsg=28992 --dst_epsg=3857

export tables to nc format for faster subgrid calculations

flowmap export --format tables --src_epsg=28992 aw_refi_def_asc.tiff --valid-range -10 10

export id grid (for faster lookups)

flowmap export --format id_grid --src_epsg 28992 aw_ahn_d_asc.tiff

compute subgrid interpolation (for last timestep)

flowmap subgrid aw_refi_def_asc.tiff --src_epsg=28992 --timestep -1

regrid the output to a tiff file can be done with gdal

gdal_grid -zfield subgrid_waterlevel groesbeek_map_waterlevel_last.geojson groesbeek_map_waterlevel_last_idw.tiff -outsize 16069 20071 -a invdistnn:power=3.0:max_points=4:radius=8 -txe 188819.156 196867.156 -tye 426992.399 416956.899

extracting the relevant contour

gdalwarp -q -cutline "D:/11201337 Water op Straat WS Rivierenland/008. Model/B. Results/LeerdamWest/case14/Leerdam_contour.shp" -tr 0.5 0.5 "D:/11201337 Water op Straat WS Rivierenland/008. Model/F. Post Subgrid/Leerdam/from Fedor/wd_v20180131.tif"

In the case of Delft3D you can convert the default nefis output to netCDF using the vs_trim2nc.m matlab script.
There is also direct nefis support in development, but that has not been properly tested.
By default you will want to project to the web mercator projection. Then you can reuse the velocities as pixels/s in an animation.


  • flowmap: animated vectorfield used for interactive particles
  • streamlines: generate geojson of streamlines
  • subgrid: generate subgrid waterdepth


This package was created with Cookiecutter_ and the audreyr/cookiecutter-pypackage_ project template.

.. _Cookiecutter:
.. _audreyr/cookiecutter-pypackage:

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