Latest Contributions by DuncanHornby

‎11-22-2025

@JesseWickizer You have earned yourself another beer! Should be a good party at yours tonight. 😀 Tinkering around with the default values produced the desired patch, nice! Nothing wrong with verbose code , it makes it understandable in my opinion and that's a good thing. I have created a simple video of ArcPro blowing up when going into edit mode for a layer with this cartographic effect active. I think it is well worth you getting your developers to watch this as it proper cripples the PC! Click on it to enlarge. Watch how memory is instantly consumed to the max when you go into edit mode. This is a file geodatabase feature class containing exactly 1 line which I select and do nothing more than enter edit vertices mode. I have been able to replicate this on two different machines.

‎11-21-2025

Your reformatting is not right, you have collapsed all the indentation so its impossible to determine your loop structures which ultimate dictates logic of your code. Please improve.

‎11-21-2025

You don't say how you are using arcpro. I have found the rotate edit tool can blow up arcpro when I'm accessing arcpro via a remote desktop connection. It appears to be specific to that machine and makes me wonder if it is a graphic driver issue. As Jennifer above says, we need way more detail to help.

‎11-21-2025

I've just tested this on 3.6 and it works fine for me. I had added to a layout a map frame then a legend. Under the properties on the legend I ticked on the only show features in extent option. I activate the map frame drag it to some area with nothing and the legend updates removing the layers. Try upgrading your version of ArcPro?

‎11-20-2025

I like @BarryNorthey quick method, but more can be asked about your problem. For a start the longest straight line within a polygon is often referred to as the fetch. Do a search on that on this forum/GIS SE and you will discover that your question has been asked many times. Now do you want your fetch to have a specific property like it must pass through the polygon centroid? I had asked a similar question 15 years ago on GIS SE, the Q/A is here. Have you searched the ESRI Code sharing site, there is an old ArcMap tool that does the job here you should be able to adapt it for ArcPro?

‎11-20-2025

How are you running ArcPro through a remote desktop connection or one of those virtual terminals like citrix? Or simply directly from your PC? Have you the latest graphic drivers installed? Without further information it will be difficult to resolve this as I can't tell if it is duff data, duff data source connection , duff pc or some weird connection that you are using? May be edit your question and replace your static image with a short video to show the problem?

‎11-20-2025

Thanks Jesse, you have earned yourself a 🍺! I guessed this was a cartographic problem that could be solved with an effect, I was clearly on the right track but barking up the wrong tree! So it was the dash effect I needed to tweak. I would not have known it was a conversion from metres > Inches > Points > Display Scale. So I think your solution will be valuable to others. I should warn other users don't try to edit a geometry whilst this affect is applied, ArcPro blows up, it consumed all the RAM (all 32GB) and brought the PC to a standstill... Another consequence is that the symbol in the contents pane takes on a dashed appearance. Not unreasonable as that is the symbol one has created and in my case I don't need to show it so was not a problem. But if you need to add the layer symbol to a legend in a layout you'll need to consider this.

‎11-14-2025

Yes. I sell a toolbox RivEX where all the tools are embedded into the toolbox. It works well and simplifies distribution. The only thing external is the help file, license file, shared modules and some sample data. I have come across an annoying quirk and I think it specific to VSCode. When you associate an IDE, in my case VSCode, with the arcpro it can open your code in VSCode and you have the full editing functionality of VSCode. This works about 95% of the time and when you close VSCode all your edits are transferred back into the embedded script. Nice! But... 5% of the time when you shut down VSCode it complete nukes your code and you loose everything! So imagine you are not working from a backup and all that new coding you've done is also lost! I've taught myself to select all the code and copy it, then close VSCode, then check the toolbox!

‎11-14-2025

@HannesZiegler Great to see this in the help file, I think this will be really useful for developers, I know I'll start using it! Just a quick clarification, the help page for AddMessage() has been updated, does that mean the JSON structure does not work in AddError() and AddWarning() as neither of those pages appear to have be updated with this useful functionality? In my initial idea I was using AddError() as I am most likely to want people to jump out to an error code in an online manual.

‎11-12-2025

OK what would be genuine examples of the two input parameters? oldzip = arcpy.GetParameterAsText(0) workspace_folder = arcpy.GetParameterAsText(1) Also setting parameter zero to be a File AND a Shapefile AND a Folder makes no sense to me, should it not simply be File with your filter set? Properties > Parameter 0: Data Type > File > Filter File (zip; shp) Properties > Parameter 0: Data Type > Shapefile Properties > Parameter 0: Data Type > Folder

‎11-12-2025

OK when you run it does it print your "old zip files deleted message" but nothing happens?

‎11-12-2025

Yes its not free. I'm also the author behind the tool. You now have that decision to make; spend hours of your time teaching yourself trace networks or linear referencing (which is a good thing and expands your knowledge of GIS), rely on free support from this community platform or just spend £100\£200 pounds depending if you are academic or not and have a suite of tools tailored to your needs requiring probably no more than an hour of reading the help file to get yourself up and running. If you think RivEX could help I recommend you download the demo version, have a play and get a sense of what its capable of doing.

‎11-12-2025

You could use RivEX a tool for processing data specifically along river networks. The basic work flow in RivEX would be: prepare the river network> snap your point data to the network and deal with any un-snapped data> link sites. I provide many examples of workflows in the help file, your task matches this example. The link site tool not only tells you the distance but gives you a polyline to visualise the route and use in further spatial analysis.

‎11-12-2025

Hi @RTPL_AU , Thank you for your innovative approach, certainly ticks the box of crafty! I feel there must be some symbol effect that would achieve what I'm looking for. The suppress effect sort of does it but relies on you individually setting vertices as control points (ain't going to happen!) and cut sounds exactly what I want but the help file is so poorly documented with no examples I can't get it to work the way I want. So either I'm messing it up or it can't do it, hence me reaching out to the user community. I hope others such as you offer further advice.

‎11-11-2025

Hi Community, I want to try and utilise the cartographic effects that ArcPro 3.5 has to symbolise my data without having to alter the underlying geometry. To set the scene, here is my data. The purple cross section lines are compose of two vertices and they always intersect the black point on the blue line, but note there is no vertex at that location. I show one line selected in edit mode to prove this. I want to use one of the many cool symbol effects that ArcPro has to create a two colour line, say going from red to blue changing colour at that black point, something like below. Now one approach, because I know no better, is to actually split the line at the black point and colour up individually, but I don't want to do that, I want my line whole, composed of only two vertices intersecting the black point. Encoded into each line is the percentage along the line the black point is, its always from left to right. Having spent hours looking at the help file, which is poorly documented and I even tried the new AI assistant I have been unable to achieve the effect I desire. I've explored the cut effect and the suppress effect. The suppress effect requires control points but I don't want additional vertices in the lines. The cut effect seems to alter the appearance as one zooms in/out and its units (pt) I cannot seem to associate with the black points position even though I have turned on symbol property connection. I thought this would be a relatively simple symbology effect but I have failed completely to achieve it! May be I am barking up the wrong tree with my choice of symbol effect? Or this is an effect that is not supported? May be there is some other crafty way of doing this? Can anyone help? Tagging carto guru : @JohnNelsonEsri

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My Ideas

Latest Contributions by DuncanHornby

Re: How to use the symbol layer cut effect?

Re: Python Script for Layer Annotation

Re: Version 3.5 "move" tool fails after a few moves

Re: Legend will display all layers even when deactivated

Re: ArcGIS Pro tool or workflow to create a single straight polyline of the long axis of polygons

Re: Cannot get tools to open in model builder consistently

Re: How to use the symbol layer cut effect?

Re: Script tool: embed the source code vs. using a file

Re: Enable arcpy messaging to include hyperlinks in the message

Re: ArcPro Script Tool parameter for a variety of file types

Re: ArcPro Script Tool parameter for a variety of file types

Re: Calculate distance from A to B along a stream

Re: Calculate distance from A to B along a stream

Re: How to use the symbol layer cut effect?

How to use the symbol layer cut effect?

Re: Wayback imagery and wayback metadata do not ta...

Re: Wayback imagery and wayback metadata do not ta...

Wayback imagery and wayback metadata do not tally,...

Add the ability to clear all selections on all map...

Add start and end symbology to vertices and nodes ...

ArcGIS Arcade

Coordinate Reference Systems