Description
groundArea = cellWidth*cellHeight*horizontalScale*verticalScale.
Spatial and grain-size summaries depend on area, bin width, scale and boundary conventions. Area-weighted coverage differs from pixel counts, while density per transformed grain-size unit differs from a raw bin fraction.
groundArea = cellWidth*cellHeight*horizontalScale*verticalScale.
When to use this tool
Use Raster Cell Ground Area Factor when checking a supplied spatial, grain-bin or ground-support quantity.
How to use the tool and how it works
- Enter cellWidth, cellHeight, horizontalScale, verticalScale. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read groundArea. Use the output convention below.
Require nonnegative cellWidth and cellHeight and positive horizontalScale and verticalScale. groundArea = cellWidth*cellHeight*horizontalScale*verticalScale.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| cellWidth | Cell Width | Required. Finite number; minimum 0. |
| cellHeight | Cell Height | Required. Finite number; minimum 0. |
| horizontalScale | Horizontal Scale | Required. Finite number; strictly above 0. |
| verticalScale | Vertical Scale | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| groundArea | Ground Area | Required. Finite number. |
{
"input": {
"cellWidth": 2,
"cellHeight": 3,
"horizontalScale": 10,
"verticalScale": 10
},
"output": {
"groundArea": 600
}
}Limitations and assumptions
- Each scale is ground length per source length on its axis. This rectangular planar conversion does not compute geographic pixel area, projection distortion or rotated/sheared cell 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
Use suitable mapping, grain-size and sampling methods for complete spatial distributions and geological interpretation.
References
Similar or alternative tools
- Public Voucher Locality Grid Mask
Compute cellEast = floor((east-originEast)/gridSize) and the corresponding north index.
- Insect Wing Aspect Factor
Return aspectFactor = span²/wingArea.