Add Geometry Attributes

Title  Add Geometry Attributes

Summary


Usage


Syntax

Parameter Explanation
Input_Features

New attribute fields will be added to the input features to store properties such as length, area, or x-, y-, z-, and m-coordinates.

Geometry_Properties

Determines the geometry or shape properties that will be calculated into new attribute fields.

  • AREA—Adds an attribute to store the area of each polygon feature.
  • AREA_GEODESIC—Adds an attribute to store the geodesic area of each polygon feature.
  • CENTROID—Adds attributes to store the centroid coordinates of each feature.
  • CENTROID_INSIDE—Adds attributes to store the coordinates of a central point inside or on each feature.
  • EXTENT—Adds attributes to store the extent coordinates of each feature.
  • LENGTH—Adds an attribute to store the length of each line feature.
  • LENGTH_GEODESIC—Adds an attribute to store the geodesic length of each line feature.
  • LENGTH_3D—Adds an attribute to store the 3D length of each line feature.
  • LINE_BEARING—Adds an attribute to store the start-to-end bearing of each line feature. Values range from 0 to 360, with 0 meaning north, 90 east, 180 south, 270 west, and so on.
  • LINE_START_MID_END—Adds attributes to store the coordinates of the start, mid, and end points of each feature.
  • PART_COUNT—Adds an attribute to store the number of parts comprising each feature.
  • PERIMETER_LENGTH—Adds an attribute to store the length of the perimeter or border of each polygon feature.
  • PERIMETER_LENGTH_GEODESIC—Adds an attribute to store the geodesic length of the perimeter or border of each polygon feature.
  • POINT_COUNT—Adds an attribute to store the number of points or vertices comprising each feature.
  • POINT_X_Y_Z_M—Adds attributes to store the x-, y-, z-, and m-coordinates of each point feature.
Length_Unit (Optional)

The unit in which to calculate length.

  • FEET_US—Length in feet (United States)
  • METERS—Length in meters
  • KILOMETERS—Length in kilometers
  • MILES_US—Length in miles (United States)
  • NAUTICAL_MILES—Length in nautical miles (United States)
  • YARDS—Length in yards (United States)
Area_Unit (Optional)

The unit in which to calculate area.

  • ACRES—Area in acres
  • HECTARES—Area in hectares
  • SQUARE_MILES_US—Area in square miles (United States)
  • SQUARE_KILOMETERS—Area in square kilometers
  • SQUARE_METERS—Area in square meters
  • SQUARE_FEET_US—Area in square feet (United States)
  • SQUARE_YARDS—Area in square yards (United States)
  • SQUARE_NAUTICAL_MILES—Area in square nautical miles (United States)
Coordinate_System (Optional)

The coordinate system in which the coordinates, length, and area will be calculated. The coordinate system of the input features is used by default.

Code Samples

AddGeometryAttributes example (Python window)

The following Python window script demonstrates how to use the AddGeometryAttributes tool.


import arcpy
arcpy.env.workspace = r"C:\data\City.gdb"
arcpy.AddGeometryAttributes_management("roads", "LENGTH;LINE_START_MID_END")

AddGeometryAttributes example (stand-alone script)

Get the extent rectangle of each line feature and build a 10 x 10 grid within that extent.


# Name: GridCreation.py

# import system modules
import arcpy

# Set environment settings
arcpy.env.workspace = r"C:\data\City.gdb"
arcpy.env.outputCoordinateSystem = arcpy.Describe("roads").spatialReference

# Set local variables
in_features = "roads"
properties = "EXTENT"
length_unit = ""
area_unit = ""
coordinate_system = ""

# Generate the extent coordinates using Add Geometry Properties tool
arcpy.AddGeometryAttributes_management(in_features, properties, length_unit,
                                                              area_unit,
                                                              coordinate_system)

# Use Search Cursor to walk through each feature and generate grids
with arcpy.da.SearchCursor(in_features, ["OID@", "EXT_MIN_X", "EXT_MIN_Y",
                                           "EXT_MAX_X", "EXT_MAX_Y"]) as sCur:
    for row in sCur:
        minX, minY, maxX, maxY = row[1], row[2], row[3], row[4]
        arcpy.CreateFishnet_management("fishnet_{0}".format(row[0]),
                    number_rows = 10,
                    number_columns = 10,
                    template = "{0} {1} {2} {3}".format(minX, maxX, minY, maxY),
                    origin_coord = "{0} {1}".format(minX, minY),
                    y_axis_coord = "{0} {1}".format(minX, maxY),
                    corner_coord = "{0} {1}".format(maxX, maxY),
                    geometry_type = "POLYGON",
                    labels = "NO_LABELS")

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