## Summary

Adds new attribute fields to the input features representing the spatial or geometric characteristics and location of each feature, such as length or area and x-, y-, z-, and m-coordinates.

## Usage

One or many attribute fields will be added to the input features depending on the options specified in the Geometry Properties parameter. If the fields already exist in the input features, the values in those fields will be overwritten. Use the following table to determine what fields will be added for each geometry property:

Geometry property Added field(s) AREA

POLY_AREA: The area of the polygon.

AREA_GEODESIC

AREA_GEO: The geodesic area of the polygon.

CENTROID

CENTROID_X: The x-coordinate of the centroid point.

CENTROID_Y: The y-coordinate of the centroid point.

CENTROID_Z: The z-coordinate of the centroid point. This field is only added if the input features are z-enabled.

CENTROID_M: The m-coordinate of the centroid point. This field is only added if the input features are m-enabled.

CENTROID_INSIDE

INSIDE_X: The x-coordinate of a central point inside or on the input feature.

INSIDE_Y: The y-coordinate of a central point inside or on the input feature.

INSIDE_Z: The z-coordinate of a central point inside or on the input feature. This field is only added if the input features are z-enabled.

INSIDE_M: The m-coordinate of a central point inside or on the input feature. This field is only added if the input features are m-enabled.

EXTENT

EXT_MIN_X: The minimum x-coordinate of the feature.

EXT_MIN_Y: The minimum y-coordinate of the feature.

EXT_MAX_X: The maximum x-coordinate of the feature.

EXT_MAX_Y: The maximum y-coordinate of the feature.

LENGTH

LENGTH: The length of the line.

LENGTH_GEODESIC

LENGTH_GEO: The geodesic length of the line.

LENGTH_3D

LENGTH_3D: The 3D length of the line.

LINE_BEARING

BEARING: The start-to-end bearing of the line. Values range from 0 to 360, with 0 meaning north, 90 east, 180 south, 270 west, and so on.

LINE_START_MID_END

START_X: The x-coordinate of the first point of the line or polygon border.

START_Y: The y-coordinate of the first point of the line or polygon border.

START_Z: The z-coordinate of the first point of the line or polygon border. This field is only added if the input features are z-enabled.

START_M: The m-coordinate of the first point of the line or polygon border. This field is only added if the input features are m-enabled.

MID_X: The x-coordinate of the point halfway along the length of the line or polygon border.

MID_Y: The y-coordinate of the point halfway along the length of the line or polygon border.

MID_Z: The z-coordinate of the point halfway along the length of the line or polygon border. This field is only added if the input features are z-enabled.

MID_M: The m-coordinate of the point halfway along the length of the line or polygon border. This field is only added if the input features are m-enabled.

END_X: The x-coordinate of the last point of the line or polygon border.

END_Y: The y-coordinate of the last point of the line or polygon border.

END_Z: The z-coordinate of the last point of the line or polygon border. This field is only added if the input features are z-enabled.

END_M: The m-coordinate of the last point of the line or polygon border. This field is only added if the input features are m-enabled.

PART_COUNT

PART_COUNT: The number of parts comprising the feature.

PERIMETER_LENGTH

PERIMETER: The length of the polygon perimeter or border.

PERIMETER_LENGTH_GEODESIC

PERIM_GEO: The geodesic length of the polygon perimeter or border.

POINT_COUNT

PNT_COUNT: The number of points comprising the feature.

POINT_X_Y_Z_M

POINT_X: The x-coordinate of the point.

POINT_Y: The y-coordinate of the point.

POINT_Z: The z-coordinate of the point. This field is only added if the input features are z-enabled.

POINT_M: The m-coordinate of the point. This field is only added if the input features are m-enabled.

If a coordinate system is specified, the length and area calculations will be in the units of that coordinate system unless different units are selected in the Length Unit and Area Unit parameters.

The attribute fields added by this tool are just like any fields that you can add to a feature layer. You can overwrite the field values, or delete or rename the fields. The values in these fields are not automatically recalculated after edits. If you edit the features, you'll need to run this tool again to update the field values.

If the input features have a selection, only the selected features will have values calculated in the added fields; all other features will have null values.

This tool works with point, multipoint, polyline, polygon, and annotation feature classes. Annotation is treated as a polygon feature class.

##### Caution:

This tool modifies the input data. See Tools that modify or update the input data for more information and strategies to avoid undesired data changes.

## Syntax

arcpy.management.AddGeometryAttributes(Input_Features, Geometry_Properties, {Length_Unit}, {Area_Unit}, {Coordinate_System})

Parameter | Explanation | Data Type |

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. | Feature Layer |

Geometry_Properties [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.
| String |

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)
| String |

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)
| String |

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. | Coordinate System |

#### Derived Output

Name | Explanation | Data Type |

Modified_Input_Features | The updated input features. | Feature Layer |

## Code sample

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")
```

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")
```

## Environments

## Licensing information

- Basic: Yes
- Standard: Yes
- Advanced: Yes