Spectra-precision Survey Pro v3.80 Recon GPS User Manual User Manual download pdf (Page 17)

GPS Coordinates

Fig. 3: Transverse Mercator Mapping Plane

A side view of the cylinder shows the effect of scale

distortion.

Mapping Plane

K=0.9996

K=1.0 K=1.0

Central Meridian

K>1.0

K<1.0

Distance on Ellipsoid

Distance on Map

•

Universal Transverse Mercator

Projection

The scale factor at the central

meridian (CM) is 0.9996. The

scale factor is 1.0 approximately

170-km east and west of the CM.

The scale factor is less than one

between the CM and the point of

tangency. The scale factor is

greater than one beyond the point

of tangency. Therefore, at the

central meridian, a geodetic

distance of 100m scales into a

mapping plane distance of

99.96m.

•

TDS Localization Stereographic Projection

The scale factor at the start location (usually the first

GPS base station in a project) is calculated for

ground distances at the base height. The scale factor

increases more or less uniformly in all directions as

you move away from the base. The scale factor does

not change appreciable within the range of RTK

GPS, so this map projection is an excellent way to

model simple flat earth ground level

coordinate systems.

Ellipsoid

Terrain

Mapping

Plane

Fig. 4: Localization Stereographic Mapping

Plane

A side view of the ellipsoid and

stereographic mapping plane show the

scale calculated for ground distances at

the base height.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 94 95

Comments to this Manuals

No comments

Spectra-precision Survey Pro v3.80 Recon GPS User Manual User Manual Page 17

Comments to this Manuals

Related products and manuals for Software Spectra-precision Survey Pro v3.80 Recon GPS User Manual