Sunrise and sunset for your location, based on your ground elevation and the ground blocking the sun.
LocationLakewood NJChange location ▾
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Coordinates, ground height & units
The first is how high the land itself is where you are, which the map fills in. The second is how far above that land you are: 0 standing on it, and raise it only at an upstairs window or on a roof. Both are in feet. Added together they are the height you are watching from, which is what sets how far you can see over the curve of the earth. The second one is small, which is why it starts at nothing: a 33 foot window is worth about 30 seconds.
Adjusted for the ground
Time zone selected from your location. Daylight saving is applied automatically.
Based on your ground level and the ground that can block the sun.
Sunrise Netz
Sunset Shkiya
Compare with sea level and height correction
Sunrise Netz
Sunset Shkiya
The change column compares each time with sea level. A plus means later; a minus means earlier.
Reading the ground around this location.
What this is, and what it is not
- Sea level is the ordinary number. Sea level, sun's centre 50 minutes of arc below the geometric horizon, which is 16 for the sun's own radius and 34 for refraction. This is what a printed luach gives and what every zmanim library gives by default.
- Height correction adds your elevation. Standing higher lets you see over the curve of the earth, so the sun sets later. This is the same adjustment KosherJava makes when a location carries an elevation.
- Adjusted for the ground is the main result. It walks the ground outward along every bearing the sun could set on, allows for the curve of the earth and for refraction along that ray, and takes the highest thing in the way. The sun disappears behind that, not behind the sea.
- Whether any of this should move a zman is a question for a posek, not for a calculator. Whether shkia follows the visible horizon or mishor is a real machlokes, and almost every printed luach uses sea level. This tool shows you the sky; it does not tell you which one counts.
- The air is the limit, not the map. The 34 minutes of arc of refraction is a convention: real temperature and pressure move sunset by minutes, which is more than most terrain corrections. The elevation map is bare earth at roughly 100 to 300 feet, so trees, buildings and anything close to you are not in it, and a near obstruction is exactly what it resolves worst.
- The spot that blocks the sun is usually closer than you expect, and that is the earth curving away rather than a mistake. The drop grows as the square of the distance: under 3.3 ft at 1.9 mi, 197 ft at 18.6 mi, 794 ft at 37.3 mi. So from Lakewood a 144 ft rise 1.9 mi out stands 46 ft above eye level, while a 213 ft hill 18.6 mi out is already 79 ft below it. To beat that near rise, ground 18.6 mi away would have to reach 722 ft, and at 37.3 mi it would need 1749 ft. The whole state tops out at 1804 ft, 80.8 mi off. Checked at three different map resolutions, in case the far ground was simply being sampled too coarsely to show its peaks: the answer did not move.
- Skyline here means the outline of the ground around you, bearing by bearing: for each compass direction, how high the highest land in that direction stands above or below your own eye. Zero is level with you. Three degrees up is a hill the sun has to set into; half a degree down is open ground you can see over. It is the same thing you would trace with your finger along the horizon if you turned slowly on the spot.