ListSpatialReferences

Résumé

Returns a list of available spatial reference names for use as an argument to the SpatialReference class.

Syntaxe

ListSpatialReferences ({wild_card}, {spatial_reference_type})

Paramètre	Explication	Type de données
wild_card	Limits the spatial references listed by a simple wildcard check. The check is not case sensitive. For example, arcpy.ListSpatialReferences("*Eckert*") would list Eckert I, Eckert II, and so forth.	String
spatial_reference_type	Limits the spatial references listed by type. GCS —Lists only geographic coordinate systems. PCS —Lists only projected coordinate systems. ALL —Lists both projected and geographic coordinate systems. This is the default. (La valeur par défaut est All)	String

Valeur renvoyée

Type de données

Explication

String

A list of spatial references that match the wildcard and spatial reference type. Each item in the list includes qualifying information, separated with forward slashes, to help you limit your search or better understand the purpose of the spatial reference. For example, 'Projected Coordinate Systems/World/Sinusoidal (world)' might be in the list. You can see from the path that this spatial reference is Sinusoidal, is a projected coordinate system, and is intended to be used at a global extent. Here is another example: 'Projected Coordinate Systems/UTM/South America/Corrego Alegre UTM Zone 25S'. This is a UTM spatial reference for a UTM zone in South America.

Exemple de code

ListSpatialReferences example 1

List all geographic spatial references.

import arcpy

# Get the list of spatial references and print it.
srs = arcpy.ListSpatialReferences(spatial_reference_type="GCS")
for sr_name in srs:
    print sr_name

ListSpatialReferences example 2

Print the central meridians and names of UTM zones in New Zealand.

import arcpy

# Get the list of spatial references
srs = arcpy.ListSpatialReferences("*utm/new zealand*")

# Create a SpatialReference object for each one and print the
# central meridian
for sr_string in srs:
    sr_object = arcpy.SpatialReference(sr_string)
    print "{0.centralMeridian}   {0.name}".format(sr_object)