VCS

Zusammenfassung

Provides information about the vertical coordinate system (VCS) component of a SpatialReference object.

Diskussion

Spatial references are comprised of a coordinate system and storage and processing parameters (tolerances and resolution settings). A VCS may also be included, containing information about the Z (or vertical) coordinates. For example, a point has a Z value of 100.0, but without knowing it's VCS information we are left with the following questions:

  • 100.0 from what? What is at 0.0?
  • 100.0 in what units? Meters, feet, miles?
  • 100.0 in which direction from 0.0?

Eigenschaften

EigenschaftErläuterungDatentyp
datumName
(Lesen und schreiben)

The name of the vertical coordinate system's datum.

String
direction
(Lesen und schreiben)

The positive direction of the z coordinates; 1 is upward, -1 is downwards(in the direction of gravity).

Integer
factoryCode
(Lesen und schreiben)

The factory code or WKID of the vertical coordinate system.

Integer
linearUnitName
(Lesen und schreiben)

The name of the linear units.

String
metersPerUnit
(Lesen und schreiben)

The meters per linear unit.

Double
name
(Lesen und schreiben)

The name of the vertical coordinate system.

String
verticalShift
(Lesen und schreiben)

The vertical shift of the vertical coordinate system.

Double

Codebeispiel

import arcpy

# Create a Spatial Reference (Europe Equidistant Conic) with a VCS (EVRF_2007)
sr = arcpy.SpatialReference(102031, 5621)

# Use the SpatialReference as input to a tool
out = arcpy.management.CreateFeatureDataset(outgdb, "euro_fds", sr)

# Describe the output to confirm the VCS factoryCode
sr = arcpy.Describe(out[0]).spatialReference
print(sr.VCS.factoryCode)  # prints 5621