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Architecture
...
outline
...
The
...
architecture
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outline
...
of
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Delta
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Shell
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is
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shown
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in
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the
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figure
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below.
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As
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can
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be
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seen
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from
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the
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figure,
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Delta
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Shell
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consists
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of
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a
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set
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of
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common
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class
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libraries,
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mainly
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representing
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different
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domains
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and
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software
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standards
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such
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as:
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- geospatial
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- libraries
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- (geometries,
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- features,
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- coverages);
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- hydrographic
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- libraries
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- (hydro
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- regions,
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- hydro
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- networks,
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- drainage
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- basins,
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- hydro
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- areas,
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- hydraulic
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- structures
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- and
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- other
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- hydrographic
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- features);
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- scientific
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- libraries
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- (units,
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- multi-dimensional
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- arrays,
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- variables);
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- storage
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- libraries
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- (NetCDF,
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- SQLite
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- and
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- support
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- for
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- many
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- other
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- file
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- formats
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- such
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- as
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- CSV,
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- WaterML2,
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- Shapefile,
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- file
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- formats
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- supported by GDAL);
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- workflow
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- libraries
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- (simple
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- and
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- composite
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- workflow
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- activities,
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- support
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- for
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- parallel
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- and
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- sequential
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- run
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- modes);
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- scripting
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- support
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- (based
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- on
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- IronPython);
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- general
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- application
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- framework
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- libraries
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- (Application,
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- Gui).
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These
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general
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framework
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class
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libraries
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define
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on
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a
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very
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high
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level
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how
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a
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typical
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console
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or
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graphical
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user
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interface
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application
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is
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constructed.
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They
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also
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define
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how
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different
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parts
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of
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the
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environment
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can
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be
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extended
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by
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means
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of
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plugins.
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This
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includes
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both:
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- non-gui
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- plugins, providing new data types or computational models to the system, and;
- gui plugins, providing components used to visualize different data and model configurations.
The bottom line is that Delta Shell is a flexible framework which can be easily extended by means of plugins or scripts.
Background readings on Delta Shell
Unfortunately, there is currently no complete set of documentation available for the Delta Shell components and interfaces. Additionally, the documentation that is available quickly becomes obsolete as development of Delta Shell progresses further.
Nevertheless, some background papers are available that are recommended for new Delta Shell developers to read before proceeding with any tutorials or exercises:
- Delta Shell, an open modelling environment
G. V. Donchyts, B. Jagers, (iEMSs 2010)
- Functional Coverages
G. V. Donchyts, F. Baart, H.R.A Jagers, A van Dam (OSGeo Journal 10, 2011)
Links to used open-source libraries
Additional information that might be useful concerns readings on the open source libraries that are used by Delta Shell. These readings can be found at their repositories on the Internet:
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- )
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- GeoAPI.NET
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- (
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...
- )
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- NetTopologySuite
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- (
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- )
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- SharpMap
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- (
...
...
- )
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- NHibernate
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- (
...
...
...
- )
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- Mono.Addins
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- (
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...
- )
- PostSharp (http://www.postsharp.net/
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- )
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- protobuf-net
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- (
...
...
- )
- QuickGraph (https://quickgraph.codeplex.com/
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- )
GeoAPI.NET
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and
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NetTopologySuite
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are
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used
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closely
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together
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and
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have
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each
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been
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extended
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by
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Deltares
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to
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develop
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support
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for
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geospatial
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Features
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and
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Coverages.
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SharpMap
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is
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the
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Map
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UI
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component
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used
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by
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Delta
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Shell
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. It has
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been
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extended
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by
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Deltares
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in
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a
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separate
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branch
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that
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can
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be
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found
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at
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the
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SharpMap
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repository
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(
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http://sharpmap.codeplex.com/SourceControl/latest#Branches/0.9.5-DeltaShell
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).
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For
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NetCDF,
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the
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plain
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C
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API
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is
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used
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(for
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optimal
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performance), which is integrated via a .NET ‘wrapper’ in the DelfTools.Utils.NetCDF
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library.
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The
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C#
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wrapper
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classes
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are
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quite
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similar
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to
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but not exactly modelled after the NetCDF Java API.
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