VIA Technologies EPIA SN-Series Specifications download pdf (Page 60)

FASTER Planning Software

The ellipsoidal Earth is used throughout the UTM projection system, but the

reference ellipsoid changes with the particular region of the Earth. A list of reference

ellipsoids (datum) is presented in Table 4.

Datum

Equatorial

Radius [m]

(a)

Polar Radius

[m] (b)

Flattening

(a-b)/a

Use

NAD83/WGS84

6378137

6356752.3142

1/298.257223563

Global

GRS 80

6378137

6356752.3141

1/298.257222101

WGS72

6378135

6356750.5

1/298.26

NASA, DOD

International

(1924)

6378388

6356911.9

1/297

Global

Clarke 1866

6378206.4

6356583.8

1/294.98

North

America

Table 4: Datum

The mathematical formulation to convert geographical coordinates to UTM and vice

versa are presented in Appendix 1 showing how GEOtoUTM.m and UTMtoGEO.m

scripts work. In the following picture the polygon drawn in Figure 39 is plotted using

UTM coordinates.

Figure 41:Ridolfi-area.kmz converted in UTM coordinates

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 143 144

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VIA Technologies EPIA SN-Series Specifications Page 60

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