Description
Compute wrapped longitude span, latitude span, and Z span.
A bounding box groups lower axis bounds followed by upper axis bounds. Longitude can cross the antimeridian under a specific convention, so numeric ordering and coordinate span need to be interpreted separately from actual geometry enclosure.
Compute wrapped longitude span, latitude span, and Z span.
When to use this tool
Use Bbox Six Value Axis Budget when you need a bounding-box dimension, order, or span diagnostic.
How to use the tool and how it works
- Enter bbox. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read longitudeSpan, latitudeSpan, verticalSpan, crossesAntimeridian. Inspect crossesAntimeridian before interpreting the associated values.
Require six values ordered west, south, minimum Z, east, north, maximum Z; validate longitude and latitude ranges plus north at least south and maximum Z at least minimum Z. Compute wrapped longitude span, latitude span, and Z span.1
An antimeridian-crossing box can have east below west. Ordering and span checks do not verify geometry enclosure.2
| Input field | Meaning and units | Accepted input |
|---|---|---|
| bbox | Bbox | Required. Array of finite number; maximum items 256. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| longitudeSpan | Longitude Span | Required. Finite number. |
| latitudeSpan | Latitude Span | Required. Finite number. |
| verticalSpan | Maximum Z minus minimum Z; units and vertical reference are not independently established. | Required. Finite number. |
| crossesAntimeridian | Crosses Antimeridian | Required. Boolean. |
{
"input": {
"bbox": [
170,
-10,
0,
-170,
20,
100
]
},
"output": {
"longitudeSpan": 20,
"latitudeSpan": 30,
"verticalSpan": 100,
"crossesAntimeridian": true
}
}Limitations and assumptions
- East below west selects antimeridian crossing. Equal west/east yields zero span; -180 to 180 yields 360, while 180 to -180 yields zero. The box is not checked against any geometry.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Compute bounds from the actual geometry with the intended seam policy. Validate dimensionality, coordinate ranges, and enclosure separately before using a box for spatial filtering.
References
Similar or alternative tools
- Bbox Longitude Wrap Interpretation Token
Mark crossing when east is below west and compute width as east minus west plus 360 only for that case.
- Bbox Coordinate Pair Order Check
Split it into minimum and maximum halves, compare corresponding axes, and optionally permit first-axis reversal for antimeridian crossing.