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TPC supports LandXML CgPoints.
These correlate directly with TPC's survey points.
Importing
When you select LandXML Parcels for import, TPC creates a traverse for each parcel and sets the following parameters for the new traverse.
•Inserts the point into the survey, ensuring that it has a unique point label inside the survey
•Assigns supported LandXML attributes (state, role, etc). These correlate directly with LandXML data values and will be included in any LandXML export of survey points
•Includes geodetic data
•Includes least squares data
Import Details
If you turn on the [x] Details option when you import LandXML CgPoints, TPC will add information about the points imported like in the following sample:
[ Reading CgPoints... ]
1
Attributes: PCOR
Y=1145.998 X=-626.278 Z=0.00
Exporting
Survey Points that are exported to LandXML, are exported as CgPoints, including geodetic and least squares data.
Editing Points
When you import a LandXML CgPoint into TPC, or when you create your own survey point, you can right-click that point in the Points Manager and choose Point Properties to edit the LandXML specific data for that point.
Codes vs Attributes
LandXML's CgPoint codes correlate with TPC's survey point attributes.
Geodetic Data
When TPC imports a CgPoint with geodetic data, it assigns what TPC calls Geodetic Preference to that point. This means that the coordinates for the point will be computed from the geodetic position using the CRS of the survey.
Surface Points
When TPC imports a LandXML surface, it prepends DTM to the point label. So point 1 becomes DTM1 and so on. These surface points are currently added to the survey points, so the DTM prefix helps identify the imported surface points.
TPC also creates a source traverse and appends the surface points to it. TPC uses source traverses to know which topo points go with which surface.
When you write a LandXML file, TPC looks at each surface to see if it was imported from a LandXML or CAD file. If it was, TPC doesn't include the surface points in the CgPoints section of the LandXML file. Instead, each surface TPC writes to a LandXML file defines it's own points.
Related Topics
LandXML
Importing Data
Exporting Data
Editions
Professional
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