VCS

Résumé

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

Discussion

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?

Propriétés

Propriété	Explication	Type de données
datumName (Lecture/écriture)	The name of the vertical coordinate system's datum.	String
direction (Lecture/écriture)	The positive direction of the z coordinates; 1 is upwards, -1 is downwards (in the direction of gravity).	Integer
factoryCode (Lecture/écriture)	The factory code of the vertical coordinate system.	Integer
linearUnitName (Lecture/écriture)	The name of the linear units.	String
name (Lecture/écriture)	The name of the vertical coordinate system.	String
verticalShift (Lecture/écriture)	The vertical shift of the vertical coordinate system.	Double

Exemple de code

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