VIA Technologies EPIA SN-Series Specifications download pdf (Page 59)

FASTER Planning Software

One of the advantages of the UTM projection is that geographic location are given in

x and y coordinates in meters, using the meridian halfway between the two bounding

meridians as the central meridian, and reducing its scale to 0.996 of true scale (point 4 of

the previous list). This reduction was chosen to minimize scale variation in a given zone

and the amount of distortion is held below 1/1000 inside each zone. Distortion of scale

increases in each UTM zones as the boundaries between two zones are reached. To define

a position in the UTM system three value must be specified: UTM zone and easting and

nothing coordinate pair.

The easting is the projected distance of the position from the central meridian, while

the northing is the projected distance of the point the equator. I order to avoid negative

numbers, to the central meridian of each zone is given a false easting value of 5*10

In the northern hemisphere, positions are measured northward from the equator,

which has an initial northing value of 0 m and a maximum northing value of

approximately 9.328*10

m at the 84

parallel. In the southern hemisphere, northings

decrease going southward from the equator, which has a false northing of 10

m so that no

point within the zone has a negative value. As an example the Forlì Ridolfi Airport is

located at [44°11‟42‟‟ N, 12°04‟11‟‟ E] in geographical coordinates which corresponds to

[33T, 265835.35, 4897707.58] in UTM coordinates.

Figure 40: UTM System [Ref. (27)]

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 143 144

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VIA Technologies EPIA SN-Series Specifications Page 59