Zusammenfassung
The VCS class provides information about the vertical coordinate system component of a SpatialReference object.
Diskussion
Spatial references are comprised of a coordinate system and storage and processing parameters (tolerances and resolution settings). A vertical coordinate system 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 its vertical coordinate system information, you may have 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
| Eigenschaft | Erläuterung | Datentyp |
| 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 vertical coordinate system (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 vertical coordinate system factoryCode
sr = arcpy.Describe(out[0]).spatialReference
print(sr.VCS.factoryCode) # prints 5621