Download Point scale factor apk free for Android smartphone

10 Dec
Point scale factor

Posted by BinaryEarth in Tools | Dec. 10, 2014 | 0 Comments

Apk file size: 0 bytes

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

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".

BinaryEarth part of our Tools and have average installs from 500 to 1000. Last Update Dec. 10, 2014. Google play rating is 86.6667. Current verison is None. Actual size 0 bytes.

Download point-scale-factor.apk 0 bytes


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