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Total eclipse — 12 Aug 2026
Sun is 3.5–6.5° up at az ~285° (WNW). Ridges decide everything.
the model, the maths, the pipeline ↗
Layer
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Eclipse Visibility Index
Clearance (sun − horizon)
Fraction of totality visible
Terrain horizon angle
Totality duration
Sun altitude
Distance to blocking ridge
↔ Relative to pinned reference
blocked by terrain
outside totality
Scale
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Fixed — comparable across the map
Stretch — more contrast,
not comparable
Model knobs
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Clearance required
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°
0.27° = whole solar disk clears. IEEC’s map implies ≈1.0°.
Margin saturates at
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°
Extinction τ
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Corona dimming ∝ e^(−τ·airmass). τ=0 ignores sun altitude.
Heatmap opacity
Basemap
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OpenStreetMap — roads
Satellite — PNOA orthophoto (25 cm)
Topographic — IGN MTN
None — dark
Roads & place labels on top
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Basemap brightness
Compare
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Pin next click as reference
No reference pinned. Pin one, then click anywhere to see how it compares.
Overlays
Top observing spots
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Hillshade
Totality limits + central line
Duration contours
IEEC / Generalitat verdict
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Generalitat observation points
3D terrain (tilts to look into the sun)
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