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code python for azimuth and quadrant

jarbaslima55dias

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?

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danretired

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

jarbaslima55dias

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:

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

Thank You

danretired

Answered?

danretired

N is already a string

You only use 'str' to convert numbers to text

jarbaslima55dias

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

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

danretired

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 =

jarbaslima55dias

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

box1.jpg

danretired

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

jarbaslima55dias

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