topic Re: buffer lines and points at same time in ModelBuilder Questions

buffer lines and points at same time

GinaBrewer-Mills — Thu, 09 Jul 2020 17:21:30 GMT

Does anyone know if there is a way to say use "Select By Attributes" on both a point and line feature with the same attribute, then buffer that selection with a graphic buffer?

I am basically trying to select some points and lines together and create a bounding box around them. Then I need to retrieve the bounding box coordinates.

Thanks for any help or advice

Re: buffer lines and points at same time

DanPatterson — Thu, 09 Jul 2020 18:01:06 GMT

Use Envelope in

Minimum Bounding Geometry—Data Management toolbox | Documentation

on both the points and poly* features to get both their extents,

then use

Append—Data Management toolbox | Documentation

on both the Envelop files and finally

do a Minimum bounding Geometry Envelope on the resultant.

Add Geometry Attributes—Data Management toolbox | Documentation

to that file to get the extent coordinates

Re: buffer lines and points at same time

GinaBrewer-Mills — Thu, 09 Jul 2020 20:30:46 GMT

Thanks Dan I will give it a shot!

Re: buffer lines and points at same time

DanPatterson — Sun, 12 Dec 2021 08:55:49 GMT

Gina Brewer-Mills‌

I would be remiss if I didn't provide a numpy lesson

import numpy as np
from numpy.lib.recfunctions import structured_to_unstructured as stu
from arcpy.da import FeatureClassToNumPyArray
f0 = r"C:\Git_Dan\npgeom\Project_npg\npgeom.gdb\Polygons2"
f1 = r"C:\Git_Dan\npgeom\Project_npg\tests.gdb\sq"
a0 = stu(FeatureClassToNumPyArray(f0, ["SHAPE@X", "SHAPE@Y"], explode_to_points=True))
a1 = stu(FeatureClassToNumPyArray(f1, ["SHAPE@X", "SHAPE@Y"], explode_to_points=True))
a01 = np.concatenate((a0, a1), axis=0)
min_xy = np.min(a01, axis=0)
max_xy = np.max(a01, axis=0)

min_xy, max_xy
(array([ 300000.0,  5000000.0]), array([ 300025.0,  5000018.0]))‍‍‍‍‍‍‍‍‍‍‍‍‍