ArcMap

ListSpatialReferences

Zusammenfassung

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

Syntax

ListSpatialReferences ({wild_card}, {spatial_reference_type})
ParameterErklärungDatentyp
wild_card

Limits the results returned. If a value is not specified, all values are returned. The wildcard is not case sensitive.

SymbolDescriptionExample

*

Represents zero or more characters.

Te* finds Tennessee and Texas.

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.

(Der Standardwert ist All)

String

Rückgabewert

DatentypErklärung
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.

Another example is 'Projected Coordinate Systems/UTM/South America/Corrego Alegre UTM Zone 25S'. This is a UTM spatial reference for a UTM zone in South America.

Codebeispiel

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)

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