topic Re: Create multiple points with mouse click in Python Questions

Create multiple points with mouse click

PacoAlverez — Sat, 11 Dec 2021 07:40:29 GMT

I would like to be able to click multiple locations and create points where i click and populate each points x, y. i have the current code but only creates one point, so i needs help.

current code.

#import modules  
import arcpy  

arcpy.env.qualifiedFieldNames = False
An = "AnimalSightings" #target point feature class Animal Sightings

mxd = arcpy.mapping.MapDocument("CURRENT")  
df = arcpy.mapping.ListDataFrames(mxd)[0]  
dfsr = df.spatialReference  
fcsr = arcpy.Describe(An).spatialReference  
if dfsr.name == fcsr.name:  
    """Now do your work"""  

point = arcpy.GetParameterAsText(0)  #click

  
for prow in arcpy.da.SearchCursor(point,'SHAPE@XY'):        
    x,y = prow[0]      
del prow  


row_value = [x,y,(x,y)]  
with arcpy.da.InsertCursor(An,('POINT_X', 'POINT_Y','SHAPE@XY')) as cursor:
    cursor.insertRow(row_value)

Re: Create multiple points with mouse click

WesMiller — Fri, 24 Jul 2015 17:36:30 GMT

You first need to nest every thing under your if statement you'll be able to tell by the indentation

Then move line 19 below line 24 and nest everything 19 - 24 under the for statement. del prow should be aligned with the for statement be careful and watch your indentation it's important in python

Re: Create multiple points with mouse click

PacoAlverez — Sat, 11 Dec 2021 07:40:31 GMT

Like so?

#import modules  
import arcpy  

arcpy.env.qualifiedFieldNames = False
An = "AnimalSightings" #target point feature class Animal Sightings

mxd = arcpy.mapping.MapDocument("CURRENT")  
df = arcpy.mapping.ListDataFrames(mxd)[0]  
dfsr = df.spatialReference  
fcsr = arcpy.Describe(An).spatialReference  
if dfsr.name == fcsr.name:  
    """Now do your work"""  

point = arcpy.GetParameterAsText(0)  #click
pointCount = int(arcpy.GetCount_management(point).getOutput(0))

if  pointCount >= 1:
    for prow in arcpy.da.SearchCursor(point,'SHAPE@XY'):        
        x,y = prow[0]      
     

    row_value = [x,y,(x,y)]  
    with arcpy.da.InsertCursor(An,('POINT_X', 'POINT_Y','SHAPE@XY')) as cursor:
        cursor.insertRow(row_value)
del prow

Re: Create multiple points with mouse click

WesMiller — Sat, 11 Dec 2021 07:40:34 GMT

Try to use the code below as a guide.

if sr == sr:
    point = arcpy.GetParameterAsText(0)
    for prow in SC:
        x,y
        row_value =
        with arcpy.da.insertCursor:
            cursor.insertRow()
    delprow

Re: Create multiple points with mouse click

WesMiller — Sat, 25 Jul 2015 14:39:08 GMT

Were you able to get your code formatted correctly?

Re: Create multiple points with mouse click

PacoAlverez — Mon, 27 Jul 2015 14:48:07 GMT

sorry, i was out for the weekend.

I was not able to get the code to allow me to create multiple points.

i a not sure what if sr ==sr: is doing other then comparing two values.

Re: Create multiple points with mouse click

CCWeedcontrol — Mon, 27 Jul 2015 16:05:30 GMT

sorry, i was out for the weekend.

I was not able to get the code to allow me to create multiple points.

i a not sure what if sr ==sr: is doing other then comparing two values.

Re: Create multiple points with mouse click

DarrenWiens2 — Sat, 11 Dec 2021 07:40:37 GMT

I'm not sure if you've got this figured out by now, but here is generally how you can add multiple points from a feature set to a feature class:

import arcpy

point = arcpy.GetParameterAsText(0) # the feature set (or in-memory fc)

pointFC = r'C:/junk/points.shp' # the on-disk fc

insCursor = arcpy.da.InsertCursor(pointFC,'SHAPE@XY') # create insert cursor

with arcpy.da.SearchCursor(point,'SHAPE@XY') as cursor: # loop through feature set
    for row in cursor:
        insCursor.insertRow(row) # insert row

del insCursor # delete insert cursor

Of course, you could just as easily run the Append tool rather than using cursors, but I assume you have a specific reason for going into this detail.

Re: Create multiple points with mouse click

PacoAlverez — Sat, 11 Dec 2021 07:40:39 GMT

interesting. so if i wanted to populate the POINT_X and POINT_Y how would i do that.

I am having no luck, i am getting error:

Traceback (most recent call last):

File "C:\GIS\Python\AddPoint\AddPoint_4.py", line 23, in <module>

row[0] = centroid.x

NameError: name 'centroid' is not defined

#import modules  
import arcpy  

arcpy.env.qualifiedFieldNames = False
pointFC = "AnimalSightings" #target point feature class Animal Sightings

mxd = arcpy.mapping.MapDocument("CURRENT")  
df = arcpy.mapping.ListDataFrames(mxd)[0]  
dfsr = df.spatialReference  
fcsr = arcpy.Describe(pointFC).spatialReference  
if dfsr.name == fcsr.name:  
    """Now do your work"""  

point = arcpy.GetParameterAsText(0)  #click
for prow in arcpy.da.SearchCursor(point,'SHAPE@XY'):        
        x,y = prow[0]
del prow        

insCursor = arcpy.da.InsertCursor(pointFC,('POINT_X','POINT_Y','SHAPE@XY')) # create insert cursor  

with arcpy.da.SearchCursor(point,('POINT_X','POINT_Y','SHAPE@XY')) as cursor: # loop through feature set  
    for row in cursor:
        row[0] = centroid.x
        row[1] = centroid.y
        insCursor.insertRow(row) # insert row  
  
del insCursor # delete insert cursor

Re: Create multiple points with mouse click

DarrenWiens2 — Sat, 11 Dec 2021 07:40:42 GMT

NameError: name 'centroid' is not defined

^ means there is no variable yet defined as "centroid". This "centroid" thing you are looking for is a property of a PointGeometry. A PointGeometry's centroid is a Point, which has properties 'X' and 'Y'.

Using SHAPE@XY:

This returns an x,y tuple, not a geometry object. You can create a Point from this tuple like so:

point = arcpy.Point(row[2][0],row[2][1])
print point.X
print point.Y

Using SHAPE@:

This returns the geometry itself, so if you are reading points, row[2] will be a point object.

Re: Create multiple points with mouse click

PacoAlverez — Sat, 11 Dec 2021 07:40:45 GMT

Darren i am still confused on how to incorporate what you suggested into my code.

this is what i currently have.

#import modules  
import arcpy  

arcpy.env.qualifiedFieldNames = False
pointFC = "Animal Sightings" #target point feature class Animal Sightings

mxd = arcpy.mapping.MapDocument("CURRENT")  
df = arcpy.mapping.ListDataFrames(mxd)[0]  
dfsr = df.spatialReference  
fcsr = arcpy.Describe(pointFC).spatialReference  
if dfsr.name == fcsr.name:  
    """Now do your work"""  

point = arcpy.GetParameterAsText(0)  #click
for prow in arcpy.da.SearchCursor(point,'SHAPE@XY'):        
        x,y = prow[0]
del prow        
         
point1 = arcpy.Point(x, y)        
ptGeometry = arcpy.PointGeometry(point1)      
           
insCursor = arcpy.da.InsertCursor(pointFC,('POINT_X','POINT_Y','SHAPE@XY')) # create insert cursor  

with arcpy.da.SearchCursor(point,('POINT_X','POINT_Y','SHAPE@XY')) as cursor: # loop through feature set  
    for row in cursor: 
        POINT_X = row[0]  
        POINT_Y = row[1] 
        insCursor.insertRow(row) # insert row  
  
del insCursor # delete insert cursor

Re: Create multiple points with mouse click

DarrenWiens2 — Sat, 11 Dec 2021 07:40:48 GMT

It's tough to help without knowing how it doesn't work - is there an error?

Your current example assigns values to variables POINT_X and POINT_Y which are never used. However, since your InsertCursor and SearchCursor happen to use the exact same fields, you should be able to use the entire row from the SearchCursor to insert into the InsertCursor.

insCursor = arcpy.da.InsertCursor(pointFC,('POINT_X','POINT_Y','SHAPE@XY')) # create insert cursor    
  
with arcpy.da.SearchCursor(point,('POINT_X','POINT_Y','SHAPE@XY')) as cursor: # loop through feature set    
    for row in cursor:
        insCursor.insertRow(row) # insert row

Try this. If it doesn't work, reply with error message or explanation how it fails to work.

Re: Create multiple points with mouse click

PacoAlverez — Wed, 29 Jul 2015 17:44:37 GMT

currently the code runs fine with no error, but the POINT_X & POINT_Y doesn't get populate in the attribute table of the point or points that get created. I would like to create points by using the mouse click and update the x,y of those points that i used the mouse click to create.

I am using the last code i attached.

thanks Darren.

Re: Create multiple points with mouse click

DarrenWiens2 — Wed, 29 Jul 2015 18:01:08 GMT

for prow in arcpy.da.SearchCursor(point,'SHAPE@XY'):          
        x,y = prow[0]  
del prow

^ this reads all your rows, one at a time, overwriting the values of x and y each time. So, in the end, you are left with one single pair of coordinates. A SearchCursor is like a for loop that cycles through all records and then stops. If you want to do something for each record in "point", you need to do it within the SearchCursor.