Miami (demonstration)

The crushed-shell path that keeps moving

DemonstrationEdit the plan

When the corner that goes green is open for leaving things out

Each month read on its 30th, or the last day of a shorter month · 2026
Something left out here, through the year. The corner that goes green cannot be read for leaving things out in any month yet. 0 months open, 0 shut, 12 unanswered.JanFebMarAprMayJunJulAugSepOctNovDec0months open
  • Works
  • Tight
  • No
  • Unanswered

Rings run from midnight at the centre to 11 pm at the edge. Schematic: A shape of the facts, not a picture of a particular date or a measured outline. Each month is its 30th, or the last day of a shorter month, not a promise about the other days.

The corner that goes green cannot be read for leaving things out in any month yet.

  • All year: cannot be answered, because ultraviolet dose has not been recorded here.
The same year as a table
MonthOpenUsable hoursWhat decides it
January 30——Ultraviolet dose closes it
February 28——Ultraviolet dose closes it
March 30——Ultraviolet dose closes it
April 30——Ultraviolet dose closes it
May 30——Ultraviolet dose closes it
June 30——Ultraviolet dose closes it
July 30——Ultraviolet dose closes it
August 30——Ultraviolet dose closes it
September 30——Ultraviolet dose closes it
October 30——Ultraviolet dose closes it
November 30——Ultraviolet dose closes it
December 30——Ultraviolet dose closes it

The corner that goes green for Something left out here. October 30, 2026 at 3:59 AM, America/New_York. Now on this date. Confidence low. Cause: How long it stays wet is what stops it.

Furniture, cushions, a rug, a finish. What this place does to it over a year.

Something left out here

The corner that goes green does not work for leaving things out over a year here, and how long it stays wet is why.

“No” means the model does not support this use under the conditions being read. The controlling limits are listed below.

  • Past the limit How long it stays wet is about 21h — 9h over (at most 12h)Estimate: Worked out, but at least one input was assumed rather than measured.

    Soaked here, things stay wet into the next day for 9 months of the year. That, not rainfall, is what destroys what you leave out.

    Repeated wetting with slow drying is what actually destroys outdoor things, far more than rainfall totals.

  • Past the limit Hours of surface heat is about 8h — 3h over (at most 5h)Estimate: Worked out, but at least one input was assumed rather than measured.

    The surface here passes 113°F for about 8 hours, peaking near 137°F. That is the number that matters for bare feet, paws and anything resting on it.

    Heat cycling opens joints, lifts finishes and warps boards.

  • Close to the limit Ultraviolet dose is 1.2 MJ/m2/day — 0 MJ/m2/day over (at most 1.1 MJ/m2/day)Worked out: Computed from the geometry, the sun and the weather you gave it.

    This spot takes a hard ultraviolet dose. Fading and finish breakdown are the first things you will see, long before anything structural.

    Ultraviolet dose is cumulative and does not care whether anyone is sitting there.

What would change this. This would change if how long it stays wet were measured and came out differently. The figure is an estimate, not a tape.

Confidence low (43%). Treat this as a starting hypothesis, not an answer.

What this answer was built from
Use
Something left out here
Place
The corner that goes green
Weather
Hot and humid, long cooling season (scenario shape) (from a published source)
Method
Twelve representative days across the year, read at the month that punishes hardest

What next here

Testing a change

3 of 8 milestones. One thing is still in the way of privacy, sightlines and screening advice.

  1. Getting an honest answer3 of 4 done
    • Placed on the earth — done. The sun is in the right part of the sky for this address.
    • A spot to read — done. 1 spot is being read.
    • What stands in the way — done. 3 things are drawn, so the shade is worked out rather than assumed.
    • Who can see in — not done. Privacy is the most common reason a terrace goes unused, and it cannot be answered without knowing which windows look at it.
  2. Testing a changeyou are here0 of 2 done
    • A change tested — not done. Testing a change before buying it is the cheapest part of the whole exercise.
    • A forecast checked — not done. A forecast nobody goes back and checks is a guess with a date on it.
  3. Proving it well enough to spend money0 of 2 done
    • Corrected against reality — not done. After a couple of rechecks the model can be corrected against this specific garden.
    • Photographed — not done. A photograph is what turns a drawing somebody sketched into a drawing somebody can check.
  1. Mark the windows that look at this spot

    Being overlooked is one of the most common reasons a good terrace goes unused, and it is the one reading here that cannot be inferred from anything else.

    a tap per windowneeded for privacy, sightlines and screening advice
  2. Get this place to Annotated

    A photographic check on the mapped sightlines and geometry. That makes privacy estimates more credible, but does not replace measured dimensions. Right now: Sightlines drawn from mapped observers remain provisional until their positions and heights are checked. The drawn heights have not been verified against the actual place. What is missing: Photographs of the actual place: None annotated. A photograph is how a drawn height gets checked against a real one. Photographs that know where they were taken from: No photograph has a position and a bearing, so what is marked on them cannot become a measurement. Who can see in: Nobody marked. Privacy is a question about who sees in from where, and the product will not invent one.

    3 things left
  3. Test a change before you buy anything

    The plan is good enough to ask what a screen, a tree or a canopy would actually do here — including the ones that turn out to be a waste of money.

    a few minutes, nothing bought
3 more things worth doing here
  1. Add a second spot and compare the two

    One spot gives a verdict; two give a reason. Most of what is worth learning here is why one corner works at six and the other never does.

    one tap, then read across
  2. See how this spot changes through the year

    A terrace that works in July can be unusable in September for reasons that have nothing to do with temperature. The same geometry read in four seasons is the cheapest insight here.

    a read, nothing to enter
  3. Photograph the spot and mark what is in shot

    A photograph is what separates a drawing you sketched from a drawing somebody else can check. It is also how heights get corrected without a ladder.

    one photograph

How well this place is described

Mapped
  1. Quick
  2. Mapped
  3. Annotated
  4. Measured

Shade, sky view and daily light are computed from the geometry on this plan. Unmeasured dimensions remain estimates, not verified measurements.

Sightlines drawn from mapped observers remain provisional until their positions and heights are checked. The drawn heights have not been verified against the actual place.

To reach Annotated

  • Photographs of the actual place: None annotated. A photograph is how a drawn height gets checked against a real one.
  • Photographs that know where they were taken from: No photograph has a position and a bearing, so what is marked on them cannot become a measurement.
  • Who can see in: Nobody marked. Privacy is a question about who sees in from where, and the product will not invent one.

What that buys: A photographic check on the mapped sightlines and geometry. That makes privacy estimates more credible, but does not replace measured dimensions.

Everything that was checked
  • Quick A place on the earth: Miami (demonstration), with a time zone, which is what makes an hour an hour.
  • Quick Somewhere to read: 1 spot marked. A reading is a height at a place, and moving it moves the answer.
  • Mapped The things in the way: 3 objects drawn. The house counts, and so does the neighbour's.
  • Mapped What is underfoot: 1 of 1 readings sit on a mapped surface.
  • Mapped Where the property ends: Drawn, so the product can tell you when the cheapest fix stands on someone else's land.
  • Annotated Photographs of the actual place: None annotated. A photograph is how a drawn height gets checked against a real one.
  • Annotated Photographs that know where they were taken from: No photograph has a position and a bearing, so what is marked on them cannot become a measurement.
  • Annotated Who can see in: Nobody marked. Privacy is a question about who sees in from where, and the product will not invent one.
  • Measured Heights off a tape: 0 of 3 objects are measured. The remaining 3 are this product's own inference, so no figure here is a survey figure yet.
  • Measured Something checked against the day: Nothing has been checked against a real afternoon. The model is unopposed, which is not the same as being right.

What to measure next

Ranked by how far the answer moves, not by a checklist
  1. 1Who can actually see inSit in the chair

    Sit where you actually sit and look around. Mark the one window or path you can see a person from. Until one exists, privacy is a question we are not answering rather than one that is fine.

    This is not a refinement. Nothing can answer this question until somebody marks it.

    Currently assuming: nobody is overlooking this. Tested across one confirmed observer changes the whole privacy answer.

  2. 2What you are looking atSit in the chair

    Mark the direction of the view worth keeping. No view has been marked yet, so nothing weighs what the view is worth, and a screen that blocks it looks free.

    This is not a refinement. Nothing can answer this question until somebody marks it.

    Currently assuming: no view is being protected. Tested across one corridor changes what screening is worth doing.

Drawn
Worked out
Shell pathPalms along the path28 ftThe house15 ft 1 inBoundary wall6 ft 3 inThe cornerthat goes green9121518N16 ft
BuildingNot yours (dashed edge)CanopySun’s path today (schematic)Can see inProposed

To scale · to the measurements given: Drawn to scale from the measurements given. Not a survey. It is not a survey.

Reading at

3:59 AM·October

The sun is down.

October 30 · The corner that goes green Schematic: A shape of the facts, not a picture of a particular date or a measured outline.

The sun reaches the corner that goes green at 7:29 AM. The corner that goes green loses the sun at 8:06 AM because of the Boundary wall. The corner that goes green comes back into the sun at 9:16 AM, once the Boundary wall is no longer in the way. The corner that goes green loses the sun at 4:51 PM because of the Boundary wall. The corner that goes green comes back into the sun at 5:42 PM, once the Boundary wall is no longer in the way. The corner that goes green loses the sun at 6:39 PM.

The same day as a table
The same day hour by hour, in text.
HourSunVerdictConfidenceSun position
12:00 AMdark——
3:00 AMdark——
6:00 AMdark——
8:00 AMin sun——6° up, bearing 109°
9:00 AMshaded by Boundary wall——19° up, bearing 116°
10:00 AMin sun——30° up, bearing 126°
11:00 AMin sun——40° up, bearing 139°
12:00 PMin sun——47° up, bearing 157°
1:00 PMin sun——50° up, bearing 178°
2:00 PMin sun——48° up, bearing 200°
3:00 PMin sun——41° up, bearing 219°
4:00 PMin sun——32° up, bearing 232°
5:00 PMshaded by Boundary wall——20° up, bearing 242°
6:00 PMin sun——8° up, bearing 250°
9:00 PMdark——
When the sun arrives and leaves, to the minute.
WhenWhat happens
7:29 AMThe sun reaches the corner that goes green at 7:29 AM.
8:06 AMThe corner that goes green loses the sun at 8:06 AM because of the Boundary wall.
9:16 AMThe corner that goes green comes back into the sun at 9:16 AM, once the Boundary wall is no longer in the way.
4:51 PMThe corner that goes green loses the sun at 4:51 PM because of the Boundary wall.
5:42 PMThe corner that goes green comes back into the sun at 5:42 PM, once the Boundary wall is no longer in the way.
6:39 PMThe corner that goes green loses the sun at 6:39 PM.

Direct sun at the corner that goes green, month by month

Schematic · computed: Computed from this place's own plan and climate, then drawn as a shape rather than to scale.

The corner that goes green gets the most direct sun in February, about 12 hours on the 30th, or the last day of a shorter month, and the least in December, about 2 hours.

  • Sun reaches the spot (solid)
  • Sun up, something in the way (lined)
  • Sun down (empty)
The grid, in a table
Hours of direct sun at The corner that goes green on the 30th, or the last day of a shorter month, and when.
MonthDirect sunWhen
January7 h10:00 AM–4:00 PM, 6:00 PM–7:00 PM
February12 h7:00 AM–7:00 PM
March12 h8:00 AM–8:00 PM
April12 h8:00 AM–8:00 PM
May12 h9:00 AM–9:00 PM
June12 h9:00 AM–9:00 PM
July12 h9:00 AM–9:00 PM
August12 h8:00 AM–8:00 PM
September12 h8:00 AM–8:00 PM
October9 h8:00 AM–9:00 AM, 10:00 AM–5:00 PM, 6:00 PM–7:00 PM
November4 h11:00 AM–3:00 PM
December2 h12:00 PM–2:00 PM
The sun’s path on the plan, October 30, in a table
Where the sun is at each hour it is up.
HourComes fromHeight
8:00 AME (109°)6° up
9:00 AMSE (116°)19° up
10:00 AMSE (126°)30° up
11:00 AMSE (139°)40° up
12:00 PMSE (157°)47° up
1:00 PMS (178°)50° up
2:00 PMS (200°)48° up
3:00 PMSW (219°)41° up
4:00 PMSW (232°)32° up
5:00 PMSW (242°)20° up
6:00 PMW (250°)8° up

What the place is doing at 3:59am in October

Hot and humid, long cooling season (scenario shape).

What it feels like

Estimate: Worked out, but at least one input was assumed rather than measured.cool

53°F

Felt temperature

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

The air is 62.0°F. It feels about 9 degrees cooler than the air, near 53°F.

What is doing it

What makes this reading 53°FA running total. It starts at 58°F with every named influence removed, then each influence is added in turn.58°Fshaded air−4°FHow much s…−1°FAir moveme…53°Fwhat it is

Take every named influence away and this reads 58°F. How much sky is overhead takes off 4°F, Air movement takes off 1°F. That lands at 53°F.

How this was worked out
Air
62.0°F from Hot and humid, long cooling season (scenario shape), scenario (from a published source)
Radiant
44.3°F mean radiant temperature
Method
Six-directional radiation integration, then ASHRAE operative temperature (from a published source)

Direct sun

Worked out: Computed from the geometry, the sun and the weather you gave it.after dark

0 W/m²

Beam reaching this point

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

The sun is down.

How this was worked out
Sun
below the horizon
Traced
0% of the beam reaches this point

Glare

Worked out: Computed from the geometry, the sun and the weather you gave it.none

0

On the 0–100 reporting scale: 0 is none of it, 100 the top of the scale. Not a measurement.

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

Nothing bright is in the line of sight at this hour.

How this was worked out
Facing
214deg (assumed, not measured)
Assumed
Which way the seat faces has not been set, so glare is estimated from the open direction. (assumed, not measured)

Privacy exposure

Unanswered: Something this depends on has not been given, so nothing is being guessed.

No observer has been placed yet. Privacy is a question about who can see in from where, and until one is marked there is nothing to answer.

Wind

Estimate: Worked out, but at least one input was assumed rather than measured.still

0 mph

Wind at the seat

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

Boundary wall is taking about 43% of the wind off this spot.

What is doing it

  • Boundary wall

    −0.3 mph
How this was worked out
Reference
5.5 mph at 10 m from Hot and humid, long cooling season (scenario shape), scenario (from a published source)
At seat height
0.7 mph before shelter
Shelter
43% removed by what stands upwind

View

Unanswered: Something this depends on has not been given, so nothing is being guessed.

No view worth keeping has been marked, so there is nothing to weigh a screen against yet.

Surface heat

Estimate: Worked out, but at least one input was assumed rather than measured.comfortable

62°F

Surface temperature

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

The surface is running about 62°F.

How this was worked out
Surface
Shell path
Method
Absorbed shortwave against air temperature, flattened by air movement (from a published source)

Wetness

Estimate: Worked out, but at least one input was assumed rather than measured.dries-fast

1 × the open

Drying time against the open

The bar is the 0–100 reporting scale, mapped from the reading above: 0 is none of it, 100 the top of the scale.

Still air here; moving air does a surprising amount of the drying.

How this was worked out
Drying rate
0.000 in/hour here
Method
Penman combination equation on the radiation and air actually reaching this spot (from a published source)

Light after dark

Unanswered: Something this depends on has not been given, so nothing is being guessed.

No exterior or window light has been placed yet, so what changes after dark is unanswered.

Ask something else about this place

Everything on the plan, in text
ThingReadingStandingNote
Palms along the path28 ftYou said so: You told us this, and it beats what the model worked out.55 per cent solid, and seasonal.
The house15 ft 1 inYou said so: You told us this, and it beats what the model worked out.100 per cent solid.
Boundary wall6 ft 3 inYou said so: You told us this, and it beats what the model worked out.100 per cent solid.