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Meshes in QGIS 3.6

Mgr. Peter Petrík

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About Lutra Consulting Ltd.

@lutraconsulting

www.lutraconsulting.co.uk/about

QGIS

  • Core & Plugins development
  • Trainings, Support, Migrations
  • Web GIS
  • Mobile GIS
  • MacOS Packaging

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About me and Meshes

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Mathematical Modelling in Physics

Chess

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8 years software development

QGIS core developer

(Mesh Layer, 3D , MDAL, Crayfish)

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MDAL

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MDAL http://www.mdal.xyz

MDAL

GDAL

WMS

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OGR�PostGIS

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MDAL (MIT)

  • Mesh Data Abstraction Library https://github.com/lutraconsulting/MDAL
    • Weather: GRIB, NetCDF
    • Flood Modelling: TUFLOW, FLO-2D, HEC-RAS, BASEMENT, ANUGA, 3DI
  • C++ Library (no QT, boost, …)
    • GDAL, HDF5, NetCDF, TinyXML2
  • C API
    • Extensible for Python, R, …
  • Shipped with QGIS (INTERNAL)
    • Plan to package separately
  • MDAL: Data IO
  • QGIS: Rendering, Styling, Processing

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Mesh Frame

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Mesh Frame

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Meshes

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Mesh Frame

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Mesh Frame …. 3D!

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Mesh Datasets

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Mesh Index

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Data & Time

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Data: Scalars (Contours) vs Vectors

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Time

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Weather

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Weather Data: Wind speed

https://cds.climate.copernicus.eu/ (GRIB/Netcdf)

https://mirador.gsfc.nasa.gov (Netcdf)

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Weather Data

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Weather Data (Pollution)

https://atmosphere.copernicus.eu/catalogue

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Weather Data

https://cds.climate.copernicus.eu

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Flood Modelling

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Flood modelling

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Crayfish

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Crayfish Plugin

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  • Python Only (no C++)
  • Processing: Export Frame/Datasets
  • Animations
  • Plots: Cross and Time

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Future

QGIS

  • Trace Animations in QGIS (similar to Crayfish 2.x)
  • Move processing algs from Crayfish to QGIS
  • Flood animations in 3D (so far only mesh frame support in 3D)
  • Time formatting (similar to Crayfish 2.x)
  • Mesh calculator for cell-centered and mixed datasets

MDAL

  • MDAL packaging as independent library
  • Support for more formats in MDAL
  • Improve error handling and reporting
  • Lazy loading for more formats
  • Write support for binary format(s)

MOBILE

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Q&A

peter.petrik@lutraconsulting.co.uk

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