Tongass Forest Management Tool

Productive Forest build. Upload your pre-classified Productive Forest layer, set retention and scenario knobs, then generate per-watershed results.

Boot Status

Waiting for libraries…

1) Download example data

Choose a dataset

Download selected ZIP

Choose a dataset above, then click Download. The ZIP includes GeoJSON files you can load using Step 2.

2) Upload data

Productive Forest GeoJSON (FeatureCollection)

Required fields: Name, Forest_Type, Area_Type, Acres, VMBF_AC (VMBF_AC can be blank, tool has fallbacks).

Streams (optional, display only)

Only used for display. Does not affect Productive Forest summaries in this streamlined build.

Status

No Productive Forest loaded.

3) Retention and scenario knobs

Old Growth retention target for Productive Forest below 800 ft (by Area Type)

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Rule: High Elevation (Area Type “Elevational”/“Elevation”) counts as ≥800 ft. Everything else counts as <800 ft (streams override).

YG reservation when watershed fails retention test

Reserve YG acres up to the OG shortfall (planning proxy)

Harvest fractions (scenario)

These fractions scale what is available under the rules engine. Default values are conservative for Light Touch and permissive for YG in rotational.

Rotational Forest Young Growth harvest fraction

Rotational Forest Old Growth harvest fraction (gated by retention)

Light Touch Stream Buffer selective harvest fraction (Old Growth)

Light Touch Beach Buffer selective harvest fraction (Old Growth)

Light Touch High Elevation selective harvest fraction (Old Growth)

Light Touch Karst selective harvest fraction (Old Growth)

Volume fallbacks (used only if VMBF_AC is blank)

Old Growth MBF/ac

YG MBF/ac

Override VMBF_AC with the fallbacks above (sensitivity test)

4) Symbology and layers

Hatch patterns show category colors without relying on transparency. Base fill defaults to 0% (hatch only).

Streams (line)

100%

Rotational Forest (hatched)

100%

Top: base fill; bottom: hatch stripes.

Young Growth (hatched)

100%

Opposite hatch direction from Rotational; 50% tighter spacing.

Old Growth (hatched)

100%

Opposite hatch direction from Rotational; 50% tighter spacing.

Light Touch Karst

100%

Light Touch High Elevation

100%

Light Touch Stream Buffer

100%

Light Touch Beach Buffer

100%

Basemap

Layer toggles

Layer order (top layer first)

Use arrows, then Apply.

Legend

Streams

Rotational Forest (hatched)

Young Growth (hatched)

Old Growth (hatched)

Light Touch Karst

Light Touch High Elevation

Light Touch Stream Buffer

Light Touch Beach Buffer

“Below 800 ft” is defined by Area Type not being High Elevation (Elevational/Elevation). Stream rules override elevation.

Legend

Watershed results