Hillshade Altitude Angle Default 45 Checker

Compare valid illumination altitude with illustrative 45-degree convention, not an implementation-wide default.

Description

Hillshade Altitude Angle Default 45 Checker: return matches illustrative default45.

Hillshade altitude specifies the simulated light's angle above the horizon. A familiar default is a convention, not a requirement.

This tool returns matches illustrative default45. Use the stated units and model convention when interpreting these fields.

When to use this tool

Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.

Check the supported input and output contract against an existing calculation or observation.
Use the complete example to confirm units, selector spelling and result interpretation.

How to use the tool and how it works

Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
Run the tool. Correct input errors before interpreting an output.
Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.

Accept angles from zero to ninety degrees and compare exactly with 45.^[1]

Input field	Meaning and units	Accepted input
altitudeDegrees	Altitude degrees. Degrees.	Finite number; from 0 to 90 inclusive

Output field	Interpretation
result	Object containing the following named result fields.
result.matchesIllustrativeDefault45	Matches illustrative default45 flag under the exact conditions described above.

json

{
  "input": {
    "altitudeDegrees": 45
  },
  "output": {
    "result": {
      "matchesIllustrativeDefault45": true
    }
  }
}

Limitations and assumptions

The result does not assess terrain visibility, choose optimal lighting or generate hillshade.
Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.

Alternative or Complementary methods

Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.

References

Tool behavior and example: Hillshade Altitude Angle Default 45 Checker — tool.io

Similar or alternative tools

Hillshade Azimuth Angle Input Validator
Validate finite hillshade azimuth in [0,360) degrees clockwise from north; invalid finite angles return false.
photo scale altitude focal
Approximate vertical aerial-photo scale denominator H/f when altitude above ground and focal length use the same units.