NATIONAL FLOWLINE VIEWER

Canada Stream Network Explorer

Canada-wide NHN stream-network exploration using your hydro_web zoom pyramid, overlaid with HYDAT gauges and optional cached FFA / QAQC context.

Open HYDAT screening map

Display

Show NHN zoom-pyramid flowlines Show HYDAT gauges

Flowlines are loaded by current map extent and automatically switch tables by zoom band using hydro_web.flowlines_layer_catalog.

Display

Show NHN zoom-pyramid flowlines Show HYDAT gauges Show topo wash Show true hillshade

Flowlines are loaded by current map extent and automatically switch tables by zoom band using hydro_web.flowlines_layer_catalog. Topo wash = muted grayscale topo overlay. True hillshade = terrain shading raster.

Status

Loading network and gauges…

Current zoom

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Active flowline layer

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Flowline features

Gauge features

Zoom pyramid

Loading layer catalog…

Symbology

Lower Strahler orders

Mid-order channels

Higher-order rivers

Basic gauges

FFA-ready gauges

Intermediate / caution gauges

Poor / flagged gauges

No cached FFA / QAQC context

Selected feature

Click a flowline or gauge to inspect it.

Open station deep dive

Pan and zoom across Canada. Flowlines swap automatically by zoom band.