topic Re: code python for azimuth and quadrant in Python Questions

code python for azimuth and quadrant

jarbaslima55dias — Wed, 07 Jun 2023 19:38:54 GMT

I am using the following script in ArcGIS 10.3 to calculate Quadrant (in the format angle/NE/SE/SW/NW) from azimuth.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

def quadrant(NorthAzimuth):

if ((NorthAzimuth>=0) & (NorthAzimuth<90)):

quad = 'N '+str(NorthAzimuth)+' E'

elif ((NorthAzimuth>=90) & (NorthAzimuth<180)):

quad = 'S '+str(180-NorthAzimuth)+' E'

elif ((NorthAzimuth>=180) & (NorthAzimuth<270)):

quad = 'S '+str(NorthAzimuth-180)+' W'

else:

quad = 'N '+str(360-NorthAzimuth)+' W'

return quad

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

The box Show Codeblock is cheked. This script is copied in the box Pre-logic Script Code. In the box below - "Quadrant = " is typed quadrant (!NorthAzimuth!).

My polyline shape file contains the followings fields: Start_X (double), Start_Y (double), End_X (double), End_Y (Double), Compriment (double) - polyline lenght, and NorthAzimu (double) - azimuth in degrees.

I already replace the term NorthAzimuth of script with NorthAzimu, but without sucess.

The script always returns an error message.

Please, where is the error?

Re: code python for azimuth and quadrant

DanPatterson — Wed, 07 Jun 2023 23:21:03 GMT

format the code would be useful

Code formatting ... the Community Version - Esri Community

as would the error message and a screengrab of the calculate field dialog

Re: code python for azimuth and quadrant

DanPatterson — Wed, 07 Jun 2023 23:39:02 GMT

You should also see this thread and solution

Solved: Python script/expression for field calculator for ... - Esri Community

Re: code python for azimuth and quadrant

jarbaslima55dias — Wed, 14 Jun 2023 20:29:11 GMT

Sorry, I still didn't get the expected results

Re: code python for azimuth and quadrant

DanPatterson — Wed, 14 Jun 2023 23:00:18 GMT

your code still isn't formatted properly in window1.jpg. Why not copy and format the code you are using here, using Wednesday's link.

A screen grab of it won't solve code formatting issues

Re: code python for azimuth and quadrant

jarbaslima55dias — Thu, 15 Jun 2023 18:33:05 GMT

Hello DanPatterson

Fields: NorthAzimu (Double), Quadrant (Text), Start_X (Double), Start_Y (Double), End_X (Double), End_Y (Double)

Box Pre -logic script code:

def quadrant(NorthAzimu):
if ((NorthAzimu>=0) & (NorthAzimu<90)):
quad = 'N '+str(NorthAzimu)+' E'
elif ((NorthAzimu>=90) & (NorthAzimu<180)):
quad = 'S '+str(180-NorthAzimu)+' E'
elif ((NorthAzimu>=180) & (NorthAzimu<270)):
quad = 'S '+str(NorthAzimu-180)+' W'
else: quad = 'N '+str(360-NorthAzimu)+' W'
return quad

Box Quadrant =

quadrant (!NorthAzimuth!)

Thank You

Re: code python for azimuth and quadrant

DanPatterson — Thu, 15 Jun 2023 22:16:58 GMT

def quadrant(NorthAzimu): if ((NorthAzimu >= 0) & (NorthAzimu < 90)): quad = 'N ' + str(NorthAzimu) + ' E' elif ((NorthAzimu >= 90) & (NorthAzimu < 180)): quad = 'S ' + str(180 - NorthAzimu) + ' E' elif ((NorthAzimu >= 180) & (NorthAzimu < 270)): quad = 'S ' + str(NorthAzimu - 180) + ' W' else: quad = 'N ' +s tr(360 - NorthAzimu) + ' W' return quad

is how it should be formatted

Re: code python for azimuth and quadrant

jarbaslima55dias — Mon, 19 Jun 2023 18:32:09 GMT

Hello Dan

Sorry my insistence but I still get error with tthe scipt. The code was copied exactly was sent in the window "quadrant = " . The box Show Codeblock was not checked. If the box is checked I also get error.

Please see box1.jpg

Thank You

Re: code python for azimuth and quadrant

DanPatterson — Mon, 19 Jun 2023 21:18:23 GMT

show code block

paste my copy of the code and check to see if it is ok

Quadrant (Text) is the field name, you currently are using a lower case

quadrant =

Re: code python for azimuth and quadrant

jarbaslima55dias — Tue, 20 Jun 2023 14:11:48 GMT

Hello Dan

thank you for the code, it worked correctly. But I made a small change to include Azimuth =0 or Azimuth=90 or Azimuth=180 or Azimuth=270 or Amimuth = 360. In this case, should I include 'str' in the line Quad= 'N'?

Thank You for help

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

def Quadrant(NorthAzimu):
if (NorthAzimu = 0):
Quad = 'N'
elif (NorthAzimu = 90):
Quad = 'E'
elif (NorthAzimu = 180):
Quad = 'S'
elif (NorthAzimu = 270):
Quad = 'W'
elif (NorthAzimu = 360):
Quad = 'N'
elif ((NorthAzimu > 0) & (NorthAzimu < 90)):
Quad = str(NorthAzimu) + 'NE'
elif ((NorthAzimu > 90) & (NorthAzimu < 180)):
Quad = str(180 - NorthAzimu) + 'SE'
elif ((NorthAzimu > 180) & (NorthAzimu < 270)):
Quad = str(NorthAzimu - 180) + ' SW'
else:
Quad = str(360 - NorthAzimu) + ' NW'
return Quad

Re: code python for azimuth and quadrant

DanPatterson — Tue, 20 Jun 2023 16:08:56 GMT

N is already a string

You only use 'str' to convert numbers to text

Re: code python for azimuth and quadrant

DanPatterson — Sat, 24 Jun 2023 22:58:07 GMT

Answered?

Re: code python for azimuth and quadrant

jarbaslima55dias — Mon, 26 Jun 2023 19:20:31 GMT

Hello Dan

I am using the last code you sent:

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

def Quadrant(NorthAzimu):
if ((NorthAzimu >= 0) & (NorthAzimu < 90)):
Quad = str(NorthAzimu) + 'NE'
elif ((NorthAzimu >= 90) & (NorthAzimu < 180)):
Quad = str(180 - NorthAzimu) + 'SE'
elif ((NorthAzimu >= 180) & (NorthAzimu < 270)):
Quad = str(NorthAzimu - 180) + ' SW'
else:
Quad = str(360 - NorthAzimu) + ' NW'
return Quad

>>>>>>>>>>>>>>>>>>>>>>

In this other code (with slight modification of your code) there is a small error:

Thank You

Re: code python for azimuth and quadrant

DanPatterson — Mon, 26 Jun 2023 21:13:05 GMT

Your code lacks formatting...

again... Code formatting ... the Community Version - Esri Community

and in python, condition checking for equality, like

NorthAzimu = 0 # -- is wrong

NorthAzimu == 0 # --this is right