Hydrographic Network UML Diagrams#

Scope#

These diagrams document the software architecture around the hydrographic network concept introduced to unify:

  • the loaded reference network from data.hydrography,

  • the DEM-derived generated network from geographic.river_network,

  • the persisted run features used later by display and comparison layers.

They focus on responsibilities, runtime handoffs, and the difference between canonical concepts and technical preprocessing bundles.

Code map#

  • hydromodpy/spatial/geographic/core/hydrographic_network.py: canonical network classes and naming contract.

  • hydromodpy/spatial/geographic/core/hydrographic_network_comparison.py: comparison result and geometric metrics.

  • hydromodpy/spatial/geographic/core/river_network.py: DEM-derived preprocessing outputs (RiverNetworkProducts).

  • hydromodpy/spatial/geographic/core/derived_features.py: geographic bundle that carries canonical network roles.

  • hydromodpy/workflow/steps/prepare_solver.py and hydromodpy/spatial/geographic/store_ingestion.py: persistence into the catalog.

  • hydromodpy/results/run.py: read facade and comparison accessors.

  • hydromodpy/display/figures/hydrographic_network*.py: standalone and comparison figures.

Class Diagram#

Use this diagram when the main question is: “which class is canonical, which one is technical, and which one is only a comparison result?”

@startuml title Hydrographic Network - Class Responsibilities left to right direction skinparam classAttributeIconSize 0 skinparam wrapWidth 180 class "LoadResult\nhydrography" as HydrographyLoadResult { +fields } class "FieldRecord\nhydrography_streams" as HydrographyFieldRecord { +data +metadata.raster_path +metadata.vector_path } class RiverNetworkProducts { +streams_tif +active_streams_tif +network_shp +summary_json +river_mesh_trace -- +hydrographic_network_generated_shp +hydrographic_network_generated_summary_json } class RiverMeshTrace class HydrographicNetwork { +role +vector_path +raster_path +crs +metrics +metadata +river_mesh_trace -- +from_hydrography_load_result(...) +from_river_network_products(...) } class HydrographicNetworks { +reference +generated +simulated_active } class HydrographicNetworkComparison { +reference_gdf +candidate_gdf +reference_missing_gdf +candidate_extra_gdf +reference_coverage_ratio +candidate_match_ratio +length_f1_ratio +to_metrics_record(...) } class StreamNetworkMetrics { +cell_field_network_distance_metrics(...) } class GeographicDerivedFeatures { +surface_topo +boundaries +rivers +hydrographic_networks } class Run { +available_hydrographic_network_roles() +has_hydrographic_network(role) +hydrographic_network(role) +hydrographic_network_comparison(...) +cell_field_active_mask(...) +cell_field_active_metrics(...) +cell_field_network_overlap_metrics(...) +cell_field_network_distance_metrics(...) +release_flux_network_overlap_metrics(...) +release_flux_network_distance_metrics(...) } HydrographyLoadResult --> HydrographyFieldRecord : contains HydrographyFieldRecord --> HydrographicNetwork : converted into\nrole=\"reference\" RiverNetworkProducts --> HydrographicNetwork : converted into\nrole=\"generated\" RiverNetworkProducts --> RiverMeshTrace : exposes HydrographicNetwork --> RiverMeshTrace : may carry one HydrographicNetworks o-- HydrographicNetwork : bundles GeographicDerivedFeatures o-- RiverNetworkProducts : technical bundle GeographicDerivedFeatures o-- HydrographicNetworks : canonical bundle Run --> HydrographicNetworks : reads persisted roles Run --> HydrographicNetworkComparison : computes Run --> StreamNetworkMetrics : delegates distance metrics HydrographicNetworkComparison --> HydrographicNetwork : compares two networks note bottom of RiverNetworkProducts Legacy-compatible technical output bundle from geographic.river_network preprocessing end note note bottom of HydrographicNetwork Canonical cross-layer concept used by storage, display and comparison end note note bottom of Run User-facing read facade over persisted runs. Comparison is only available when both reference and generated roles exist. end note note bottom of StreamNetworkMetrics Module hydromodpy.results.views (lazy distance metrics). The current distance metric is planar and cell-based; it is not yet the downslope DEM-routing criterion. end note note bottom of StreamNetworkMetrics Module hydromodpy.results.views (lazy distance metrics). The current distance metric is planar and cell-based; it is not yet the downslope DEM-routing criterion. end note @enduml

Runtime Component Diagram#

Use this diagram when the main question is: “where does the network come from, how is it persisted, and who consumes it?”

@startuml title Hydrographic Network - Runtime Components left to right direction skinparam componentStyle rectangle skinparam wrapWidth 180 package "Input and preprocessing" { component "HydrographyManager\nloaded reference input" as HydrographyManager component "LoadResult\nFieldRecord hydrography_streams" as HydrographyLoadResult component "build_river_network_products(...)\nDEM-derived preprocessing" as RiverBuild component "RiverNetworkProducts" as RiverNetworkProducts } package "Canonical geographic layer" { component "HydrographicNetwork\nrole = reference / generated / ..." as HydrographicNetwork component "HydrographicNetworks\nbundle of available roles" as HydrographicNetworks component "GeographicDerivedFeatures" as GeographicDerivedFeatures } package "Persistence and reading" { component "prepare_solver.py\nreference persistence" as ReferencePersistence component "store_ingestion.py\ngenerated persistence" as StoreIngestion database "SimulationCatalog" as SimulationCatalog component "Run facade" as Run } package "Consumers" { component "Standalone figures\nreference / generated" as SingleFigures component "HydrographicNetworkComparison" as Comparison component "Comparison figures\noverlay / missing / extra" as ComparisonFigures component "Comparison exports\nhydrographic_network_metrics.csv" as ComparisonExports } HydrographyManager --> HydrographyLoadResult RiverBuild --> RiverNetworkProducts HydrographyLoadResult --> HydrographicNetwork : from_hydrography_load_result(...) RiverNetworkProducts --> HydrographicNetwork : from_river_network_products(...) HydrographicNetwork --> HydrographicNetworks : stored by role HydrographicNetworks --> GeographicDerivedFeatures GeographicDerivedFeatures --> ReferencePersistence : reference role GeographicDerivedFeatures --> StoreIngestion : generated role ReferencePersistence --> SimulationCatalog StoreIngestion --> SimulationCatalog SimulationCatalog --> Run Run --> SingleFigures Run --> Comparison : when both roles exist Comparison --> ComparisonFigures Comparison --> ComparisonExports note bottom of Run If only one role exists: - standalone figure remains available - comparison API raises explicit error - comparison figures/exports are skipped end note @enduml

End-to-End Sequence Diagram#

Use this diagram when the main question is: “what is the order of operations from loading/generation to comparison?”

@startuml title Hydrographic Network - End-to-End Runtime Sequence autonumber skinparam wrapWidth 180 skinparam maxMessageSize 180 actor User participant "workflow / Project" as Workflow participant "HydrographyManager" as HydroMgr participant "geographic.river_network\npreprocessing" as GeoRiver participant "HydrographicNetwork\nfactory methods" as Factory participant "GeographicDerivedFeatures" as Features participant "SimulationCatalog" as Catalog participant "Run" as Run participant "Comparison / figures" as Compare User -> Workflow : run one simulation / overview / comparison case alt reference network is loaded Workflow -> HydroMgr : load data.hydrography HydroMgr --> Workflow : LoadResult Workflow -> Factory : from_hydrography_load_result(...) Factory --> Workflow : HydrographicNetwork(role=\"reference\") Workflow -> Features : attach reference role Workflow -> Catalog : persist hydrographic_network_reference else no reference source configured Workflow -> Features : keep reference = None end alt generated network is enabled Workflow -> GeoRiver : build_river_network_products(...) GeoRiver --> Workflow : RiverNetworkProducts Workflow -> Factory : from_river_network_products(...) Factory --> Workflow : HydrographicNetwork(role=\"generated\") Workflow -> Features : attach generated role Workflow -> Catalog : persist hydrographic_network_generated else geographic.river_network disabled or empty Workflow -> Features : keep generated = None end User -> Run : available_hydrographic_network_roles() Run -> Catalog : list_geographic_features(...) Catalog --> Run : available canonical roles alt both reference and generated exist User -> Run : hydrographic_network_comparison(...) Run -> Compare : compare_hydrographic_networks(...) Compare --> Run : HydrographicNetworkComparison Run --> User : comparison metrics / figures available else one role is missing User -> Run : hydrographic_network_comparison(...) Run --> User : explicit error: missing role(s) User -> Run : hydrographic_network(existing_role) Run --> User : standalone role still readable end @enduml

Availability Activity Diagram#

Use this diagram when the main question is: “what happens when only one role exists, or when neither role exists?”

@startuml title Hydrographic Network - Availability and Output Branching start :Build / load hydrographic-network inputs; if (reference role available?) then (yes) :Persist / expose\nhydrographic_network_reference; else (no) :reference = absent; endif if (generated role available?) then (yes) :Persist / expose\nhydrographic_network_generated; else (no) :generated = absent; endif if (reference and generated both available?) then (yes) :Enable comparison API; :Expose comparison figures; :Allow hydrographic_network_metrics export; else (no) if (at least one role available?) then (yes) :Expose standalone figure(s)\nfor available role(s); :comparison exports skipped; :comparison API raises explicit\nmissing-role error if called; else (no) :No hydrographic-network\nfigures or comparison outputs; endif endif stop @enduml

Persistence And Run API Sequence Diagram#

Use this diagram when the main question is: “how do the persisted features reach the Run API, and what errors should a developer expect when a role is missing?”

@startuml title Hydrographic Network - Persistence and Run API Sequence autonumber skinparam wrapWidth 180 skinparam maxMessageSize 180 participant "WorkflowContext\nloaded_data + geographic_features" as Ctx participant "prepare_solver.py" as ReferencePersistence participant "store_ingestion.py" as StoreIngestion database "SimulationCatalog" as Catalog participant "Run" as Run participant "Display / comparison caller" as Caller alt loaded reference hydrography exists Ctx -> ReferencePersistence : _persist_reference_hydrographic_feature(...) ReferencePersistence -> Catalog : write_geographic_feature(\n\"hydrographic_network_reference\", gdf) else no loaded reference hydrography ReferencePersistence --> Ctx : skip reference persistence end alt generated geographic network exists Ctx -> StoreIngestion : _ingest_river_network(...) StoreIngestion -> Catalog : write_geographic_feature(\n\"hydrographic_network_generated\", gdf) else no generated geographic network StoreIngestion --> Ctx : skip generated persistence end Caller -> Run : available_hydrographic_network_roles() Run -> Catalog : list_geographic_features(sim_id) Catalog --> Run : canonical feature names present Run --> Caller : [reference? generated? simulated_active?] alt caller asks for one existing role Caller -> Run : hydrographic_network(role) Run -> Catalog : read_geographic_feature(...) Catalog --> Run : GeoDataFrame Run --> Caller : GeoDataFrame else caller asks for one missing role Caller -> Run : hydrographic_network(role) Run --> Caller : KeyError with available roles end alt both reference and generated exist Caller -> Run : hydrographic_network_comparison(...) Run -> Catalog : read reference + generated Run --> Caller : HydrographicNetworkComparison else one role is missing Caller -> Run : hydrographic_network_comparison(...) Run --> Caller : ValueError\nmissing role(s), available roles listed end @enduml

Persistence And Run API Notes#

From a developer point of view, the most important operational split is:

  • prepare_solver.py persists the loaded reference role when data.hydrography produced one usable vector network.

  • store_ingestion.py persists the generated role when the geographic preprocessing produced one usable DEM-derived network.

  • SimulationCatalog stores those features under canonical names only.

  • Run does not guess. It first exposes the stored roles through available_hydrographic_network_roles() and has_hydrographic_network(...), then only enables comparison if both roles are present.

This means the runtime contract is intentionally asymmetric:

  • persistence is tolerant and simply skips missing roles,

  • reading one missing role raises a clear KeyError,

  • comparing two roles when one is absent raises a clear ValueError,

  • figure availability follows the same rule through run.display_capabilities.

Which UML Diagrams Are Worth Maintaining?#

For this topic, the highest-value diagrams are:

  1. A class diagram for the distinction between HydrographicNetwork, HydrographicNetworks, HydrographicNetworkComparison, and RiverNetworkProducts.

  2. A component diagram for the source -> canonical object -> persistence -> consumer chain.

  3. A sequence diagram for the end-to-end runtime path, including the “missing role” branch.

  4. An activity diagram for the availability branches and output gating.

  5. A developer-facing sequence diagram for persistence and Run behavior.

These three diagrams answer the most common maintenance questions:

  • where should a new field live?

  • where should a conversion happen?

  • when should a role be present or absent?

  • who is allowed to compare or display the networks?

Lower-value diagrams for this topic are:

  • state-machine diagrams, because these objects do not have a rich internal lifecycle;

  • deployment diagrams, because there is no interesting multi-node deployment question here;

  • exhaustive inheritance diagrams, because the hydrographic-network stack is composition-oriented rather than inheritance-heavy.

If more detail is needed later, the next useful addition would be one small package-level component diagram focused only on:

  • prepare_solver.py

  • store_ingestion.py

  • Run

  • the display figure registry

  • the comparison export orchestrator

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