topic Re: ArcPy Circle Function in ArcGIS Pro Questions

ArcPy Circle Function

YahyaMasri — Thu, 30 May 2024 18:33:37 GMT

I am trying to create inset maps using ArcPy and I want them to be circles, but I don't know how to create a circular function the same way a rectangle function was up on the GraphicElement Documentation.

This is the code for a rectangle that was on the documentation:

def MakeRec_LL(llx, lly, w, h):

xyRecList = [[llx, lly], [llx, lly+h], [llx+w,lly+h], [llx+w,lly], [llx,lly]]

xyRecList = [[1,1],[1, 2], [2.75, 2], [2.75, 1], [1, 1]]

array = arcpy.Array([arcpy.Point(*coords) for coords in xyRecList])

rec = arcpy.Polygon(array)

return rec

p = arcpy.mp.ArcGISProject('CURRENT')

#Create a layout

lyt = p.createLayout(6, 3, 'INCH', 'New Layout with Rectangles')

Does anyone know how to replicate this process, but for circles instead?

Re: ArcPy Circle Function

RhettZufelt — Thu, 30 May 2024 19:15:28 GMT

Not sure about layouts, but You can use the arcpy.analysis.buffer function to create circular polygons using a point and radius.

Re: ArcPy Circle Function

DanPatterson — Thu, 30 May 2024 20:20:50 GMT

def _circle(radius=100, clockwise=True, theta=1, xc=0.0, yc=0.0): """Produce a circle/ellipse depending on parameters. Requires -------- `radius` : number in projected units `clockwise` : boolean True for clockwise (outer rings), False for counter-clockwise (for inner rings) `theta` : number Angle spacing. If theta=1, angles between -180 to 180, are returned in 1 degree increments. The endpoint is excluded. Returns: ------- list of coordinates for the circle/ellipse Notes: ------ You can also use np.linspace if you want to specify point numbers. np.linspace(start, stop, num=50, endpoint=True, retstep=False) np.linspace(-180, 180, num=720, endpoint=True, retstep=False) """ import numpy as np if clockwise: angles = np.deg2rad(np.arange(180.0, -180.0-theta, step=-theta)) else: angles = np.deg2rad(np.arange(-180.0, 180.0+theta, step=theta)) x_s = radius*np.cos(angles) # X values y_s = radius*np.sin(angles) * scale # Y values pnts = np.c_[x_s, y_s] pnts = pnts + [xc, yc] return pnts

Then feed the points into

array = arcpy.Array([arcpy.Point(*coords) for coords in pnts]) rec = arcpy.Polygon(array) # or Polyline