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Terms & Concepts
whatever coordinate system is set in the project settings).
This is why it is important to set the transformation of your
project correctly as determined by the published control
the user is related to. With the database set to ITRF2008,
future adjustments of a reference frame (such as NAD83)
can be handled by the software automatically once the new
transformation parameters are uploaded to
J-Field
.
Projections
Projections allow surveyors to visualize flat grid coordinates
on the curved surface of the Earth. By projecting points on
the ellipsoid onto a grid surface, surveyors can use plane
trigonometry with geodetic positions. J-Field is preloaded
with projections from around the world and also allows
the user to enter his or her own custom, Low Distortion
Projection. Furthermore, J-Field can develop a projection
through the localization process for coordinates with an
unknown coordinate system.
Localization
Localizations in J-Field can accomplish two tasks. By
observing points in a defined coordinate system,
J-Field
can
determine the location of the reference station relative to
the defined coordinates. In an unknown system (a system
of coordinates that are not geo-referenced, such as from
a total station survey), J-Field can create a projection from
points observed on the ground. In this case, it is important
that the reference station coordinates already be related to
a known coordinate system.
Auto Naming and Sequencing
Point Names will auto increment based on the Naming
Template that is defined for each ShapeTag. When
collecting lines and curves, ShapeTags can be changed
manually to define a new shape; or can be auto sequenced
(automatically switch to another shape) by creating a
sequencing scenario and making it active. This feature is
helpful in application like collecting cross sections.
Collect and Stake
The workflow for “Collect” is shown on the Collect screen
and its “Help” explanation. For the Stakeout workflow also
read the “Stakeout” document.
Setup, Profiles and Projects
Parameters related to satellite tracking, mode of operation
(Rover, Base, Standalone), communications, favorite Codes
and ShapeTag and similar are saved with “Setup” profiles. You
can save and recall many “Setup” profiles according to your
projects needs. While Reservoir of Codes and ShapeTags
are stored as global values, favorite Codes and ShapeTags
are saved with Setup profiles. If you recall another Setup
profile, you will recall Favorite Codes and ShapeTags with
it. Geometries (points, lines, and curves), their ShapeTags,
Codes, attributes , pages and coordinate systems are saved
with “Projects”.
Beware of this distinction and use them as it fits your job
requirements. In Collect and Stake screens, pay attention
to Projects and Setup boxes in Collect and Stake screens
to make sure they are selected as you intend. Please refer
the charts in next pages to see which items are saved with
“Projects” and which items with “Setup” profiles.
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Страница 17: ...www javad com 17 Introduction ...
Страница 39: ...www javad com 39 Collect Screens ...
Страница 59: ...www javad com 59 Stake Out Points ...
Страница 91: ...www javad com 91 Stake Out Alignments ...
Страница 93: ...www javad com 93 Using ShapeTags and Codes Data Structure ...
Страница 105: ...www javad com 105 Using ShapeTags and Codes ...
Страница 149: ...www javad com 149 Localization ...
Страница 165: ...www javad com 165 Appendix B NGS AntCal Appendix B NGS AntCal Data http www ngs noaa gov ANTCAL Antennas jsp manu Javad ...
Страница 166: ...www javad com 166 Appendix B NGS AntCal Appendix B NGS AntCal Data http www ngs noaa gov ANTCAL ...