Spectra-precision Survey Pro v3.80 Recon GPS User Manual User Manual download pdf (Page 26)

GPS User’s Manual

Projection Mode Summary

Horizontal

Ground - TDS Localization

•

Local coordinates are at ground level, based on the project height.

•

Distances shot with EDM are at ground scale, so are 1:1 with

coordinates solved by the projection.

•

Default map projection and datum are automatically initialized

with RTK base setup.

Mapping Plane

•

Local coordinates are on a conformal map projection grid.

•

Distances shot with EDM are usually scaled by the combined

scale factor to distances on the map projection grid.

•

User selects map projection zone.

Vertical

Localization (+Geoid)

•

Vertical coordinate is orthometric elevation.

•

User must solve transformation from ellipsoid heights to

elevations. This is done with Localization on control points, or

using a geoid model, or a combination of both.

Ellipsoid Heights

•

Vertical coordinate is ellipsoid height.

•

This mode requires no transformation setup. Use this mode when

vertical coordinates do not need to be elevations.

If you are using

Ground- TDS Localization

for your horizontal

projection mode, and you are not using a geoid model, Survey Pro is

ready to start the RTK survey upon opening the new job. No

projection setup is necessary, so you should move ahead to the next

section on Configuring Receivers.

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Spectra-precision Survey Pro v3.80 Recon GPS User Manual User Manual Page 26