#CALCULATE GEOMETRY X ARCPY LICENSE#

MBG_Diameter-The diameter of the resulting circle.

For Circle, the new field and measurement are:.

MBG_Orientation-The orientation of the imagined line connecting the antipodal pairs.

MBG_APodY2-The y coordinate of the second point of the antipodal pairs.

MBG_APodX2-The x coordinate of the second point of the antipodal pairs.

MBG_APodY1-The y coordinate of the first point of the antipodal pairs.

MBG_APodX1-The x coordinate of the first point of the antipodal pairs.

(It may be found between more than one pair of vertices, but the first found will be used.)

MBG_Length-The longest distance between any two vertices of the convex hull these vertices are called antipodal pairs or antipodal points.

MBG_Width-The shortest distance between any two vertices of the convex hull.

For Convex hull, the new fields and measurements are:.

For Envelope, the new fields and measurements are:.MBG_Orientation-The orientation of the longer side of the resulting rectangle.MBG_Length-The length of the longer side of the resulting rectangle.MBG_Width-The length of the shorter side of the resulting rectangle.For Rectangle by area and Rectangle by width, the new fields and measurements are:.The prefix, MBG_, indicates minimum bounding geometry field. The width, length, and diameter values are in feature units the orientation angles are in decimal degrees clockwise from north. The attributes of the input features used as the group field or fields will be maintained in the output feature class.Įach geometry type can be characterized by one or more unique measurements these measurements can optionally be added to the output as new fields as described below. An output polygon feature will be created for each group the resulting polygons may overlap. Using List, each set of input features with the same field values in the specified group field(s) will be treated as a group.The attributes of the input features will not be maintained in the output feature class. Using All, one output polygon feature will be created for all input features.A new field, ORIG_FID, will be added to the output feature class and set to the input feature IDs. The attributes of the input features will be maintained in the output feature class. An output polygon feature will be created for each input feature the resulting polygons may overlap. Using None, none of the input features will be grouped.The Group Option parameter ( group_option parameter in Python) will affect the output polygons and attributes in the following ways: Use the Make XY Event Layer geoprocessing tool on the two coordinate fields to create a point event layer based on the centroid coordinates.The output polygon features and their attributes will vary depending on the specified geometry type and grouping choices. Use the Calculate Geometry function to store the X and Y coordinates of the poyline centroids in the Double fields you just created.Įxport the attribute table to a new table. Here's how you would do it:Īdd two new Double fields to your polyline shapefile attribute table. If you don't have access to the Feature To Point tool, you can calculate the centroid of a line 'manually' in the attribute table.

#CALCULATE GEOMETRY X ARCPY LICENSE#

However, this tool is only available with the ArcGIS Desktop Advanced license (formerly ArcInfo). The easiest method to find the centroid of a line is to use the Feature To Point geoprocessing tool, where your polyline shapefile are the in_features, your output points are the out_features. Note that you need to be using the Python parser in field calculator for this to work. !Shape!.positionAlongLine(0.5,True).firstPoint.X.To find the midpoints for lines and add their coordinates to the attribute table, you could do Field Calculator on the following statement: To find the midpoint, you would just need to do positionAlongLine(0.5,True). This will return a PointGeometry object with exactly one point at a specified distance from the starting end of the line, or a fraction of the distance between the start and end.

The Polyline class has a new method called 'positionAlongLine' in ArcGIS 10.1. You can use Field Calculator to determine this location, as I explained in this answer. UPDATE: Just saw that the question was changed to ask for the midpoint of a polyline, rather than a centroid.

Calculate geometry x arcpy