A simple tool for surveyors.
Given a UTM easting (E), northing (N) and height (H), this app computes the grid/point scale factor, elevation/height factor and combined scale factor values.
The following formulas are used:
Grid scale factor (GSF) = k0 + (E-E0)^2 / (2 * r0^2)
Elevation factor (EF) = R / (R + H + N)
Combined scale factor = GSF * EF
Where:
k0 = Grid scale factor at central meridian (defaults to 0.9996)
E0 = False Easting (defaults to 500000)
r0 = Geometric mean radius of curvature scaled to the grid (defaults to 6375767.131)
R = Mean radius of earth (defaults to 6365314.378)
N = Height of ellipsoid above geoid (defaults to 0.0)
The defaults are chosen so that the results agree with the following document:
The defaults can be changed by selecting the menu and choosing "Settings".
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| 熱門國家 | 系統支援 | 版本 | 費用 | APP評分 | 上架日期 | 更新日期 |
|---|---|---|---|---|---|---|
| 未知 | Android Google Play | v1.0.0 App下載 | 免費 | 1970-01-01 | 2015-03-13 | |
| 未知 | Android Google Play | 2.0 App下載 | AUD$0.99 | 1970-01-01 | 2015-04-22 |
