Questions tagged [python-parser]

For questions about ArcGIS Python Parser for labelling expressions and field calculations

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Using Python nested if statement for labels in ArcMap?

I am trying to use python to write a label expression that will display a specific set of labels based on nested if statments. The expression should result in a 4 line label if the value is greater ...
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0answers
228 views

Auto-Refresh Field that has been Calculated with Python in ArcGIS Pro

Is there a way to get a calculated field to auto-refresh? For example, I have an expiration date field with dates filled in. I have another field that I will use to show the number of days left till ...
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27 views

Calculating values for new field using values from another field as values in dictionary?

I am using the ArcMap application of ArcGIS Desktop 10.5. Im trying to use field calculator to return a max value between other fields in the feature based upon a condition. I am not new to python, ...
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1answer
55 views

Calculating fields (multiple) with different conditions for each field using ArcGIS Pro

I have a population dataset where I want to reclassify the age groups and include gender. I have the field "gender", 1 for men and 2 for women, and the field "age". One row for each person in the ...
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0answers
45 views

Reclassifying string variable in ArcGIS Field Calculator with Python Parser?

I am trying to calculate a roadway pedestrian restriction based on its functional class, using if/else logic in Python. Every time I enter this, it only turns up 'No'. The categories are strings, and ...
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63 views

If Then Statement, Python Label expression, ArcGIS Pro

I'm trying to create a Python label expression in ArcGIS Pro for a parcel layer where I only want to label the parcel when a street number in the Address field is present.If a street number is not ...
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1answer
526 views

Converting Text Field to Numeric in ArcGIS Pro?

I'm trying to convert text to numeric, but am unable to in ArcGIS Pro. Is there a Python function? I tried int(!FieldName!) but I think NULL values are messing it up?
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0answers
58 views

Using IF-Statements in Calculate Field Code Block inside an Iteration

I have created a model in ArcGIS 10.2 that iterates through some feature classes in order to add a field 'Zmin10' (double) and calculate the field value based on a variable (called "Minimum") to which ...
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0answers
41 views

Is there a way to use the project layout if using a plug in that creates batch maps through QGIS?

There is a plugin for biological records which creates batch maps for each taxon but it bypasses the premade project layout with a legend, picture of a logo and the copyright for each of them. Is ...
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0answers
62 views

Using python parser of ArcGIS field calculator to calculate field using information from subsequent row?

When using the field calculator, how do I get data from the subsequent row in python? Let's say I want to add a new field called head_diff. I want to take the current row's value for head, minus ...
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0answers
38 views

Limit the number of lines in a stacked label using python parser in ArcMap labels

I am labeling names of places by stacking the labels at each space using the python code below. This makes some incoherent labels for text with many spaces and short or abbreviated words. def ...
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61 views

Select points by continuous numbers

I have GPS points driven over the same road back and forth then clipped to a section of that road. My points are overlapping and need to identify the points going one way or one run down the road in ...
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1answer
146 views

Error updating firstChild.data when updating WebCapabilities

I'm trying to update the WebCapabilties to allow uploads for a service definition. I've followed the instructions from ESRI's website, but when I try to set the keyValue.nextSibling.firstChild.data ...
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20 views

Calculating difference between value of each row using ArcMap Field Calculator

Logic: Compute the difference between the angle for each subsequent geometry in the attribute table def GetAngleDif(angle): dif = angle.a - angle.b return dif ERROR 000539: Error running ...
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39 views

Using Calculate Field in ArcGIS Pro

I have several field in an attribute table that have value, I am wanting to using the 'Calculate Field' GP tool to select the values and replace them with zero. Anyone have any ideas on the Python ...
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1answer
39 views

Iterating over table to create chainages using Python in ModelBuilder

I routinely have to do the following workflow: Map GPS points;- Create lines based on those GPS points; Split the lines at a set interval distance (every 50m, every 100m etc.) Add from / to fields ...
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0answers
31 views

Updating Date Field based on date value ONLY from another field using ArcGIS Field Calculator

In ArcMap 10.4 I have the following code in Pre-Logic Script Code Section in Field Calculator with python option selected and show code block: from datetime import datetime def myfunction(date_text):...
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39 views

Adding minimum point Z of polygon using ArcGIS Field Calculator?

In the middle of a ModelBuilder tool I created, I have a Z enabled feature with multiple polygons. I want to add on a specific field of this feature, the lowest Z value of each polygon. I know this ...
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68 views

Converting Python to Arcade in ArcGIS Online?

The following python expression can trim street addresses for labeling in ArcMap. I need to convert the expression to Arcade so I can retain the same labeling scheme when pushing my feature layer ...
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0answers
107 views

Changing date format for labels in ArcGis Pro with label expression?

I am trying to use an expression to convert my date field to a simple %d,%b,%Y format. Right now it is in "%Y%m%d %H:%M:%S %z" How do I do it properly using Python to do this in ArcGIS Pro? Q&...
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46 views

Calculating field after arcpy.Append_management()?

I have some AutoCAD layers (f.e. Cad1, Cad2) and I want to export them into feature class in a geodatabase (f.e. feature_class). Also I want to calculate field in "feature_class" for objects from CAD. ...
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0answers
59 views

Calculating Raster Percentile Values in ModelBuilder

I want to calculate the 75th percentile value of a raster dataset (floating, 32Bit) and use this value as an input to a set null expression. I have multiple rasters to perform this on so I need to ...
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0answers
37 views

Add the lengths of columns with the same id in arcmap

I have a polyline dataset that contains a unique feature (manhole) and the lines segmented by outflows from it. I need to get the distance from the manhole to each break on the line. So in the MH ...
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2answers
256 views

Creating label with number circle and field “1v” in ArcMap?

How to create a label which combines a circle number and field "1v" in ArcMap? For example: I need, a line the labels. My code label expression is: Function FindLabel ( [TOTAL_VIV] ) FindLabel = "&...