Latest Contributions by DarrenWiens2

I believe the out-of-the-box ArcGIS tool for this is Euclidean Allocation. ... View more

Try saving as a .tif, which doesn't have the same naming restrictions. That way, you may be able to determine whether it's a problem with your file name (doesn't look like it), in-line variable substitution (maybe?), or something else entirely (probably?). ... View more

I would start by identifying ridgelines and sampling those pixels as potential observation points. You can get at ridgelines by finding pixels where flow accumulation = 0. ... View more

You must (?) enclose your field names in brackets (as you did long before) in the label expression FindLabel function : def FindLabel ( [stand_code], [Avg_TPA_Pine], [Avg_TPA_Cyp], [Avg_TPA_Hdwd] ): ... View more

'in_memory' isn't a table, it's a workspace. The table output from Create Table is 'in_memory\submittedLongLat%time%', which is the desired input for the next tools. ... View more

'in_memory' is the input 'out_path' parameter. ... View more

Have you tried stretching it all out linearly, not using precondtions? So, Create Table, then Calculate Field, then Calculate Field, and finally Make XY Event Layer. I use Python rather than ModelBuilder - perhaps the linear model is exactly equivalent to using preconditions, but I've never had much luck getting them to work as I want. I don't think 'in_memory' is the culprit. As long as you're not running out of memory, it should function more or less like a FGDB feature class. Does it work if you save the file to disk? ... View more

That is how you would set the workspace environment. If you just want to get the workspace environment, switch the equation: >>> path = arcpy.env.workspace >>> print path # workspace location Some other peripheral ideas would be to reference the script location: >>> import sys >>> print sys.argv[0] # script location ... or the current mxd location: >>> print arcpy.mapping.MapDocument("CURRENT").filePath # current mxd location ... View more

My understanding of list comprehensions (which is limited) is that it becomes a list comprehension when it meets the following pattern: [return elements of some sort for something in some iterable if some condition] # all in an outgoing list I'm not sure at which point Python decides that this is a list comprehension, or if that's even important. List comprehensions are a convenient way to build lists (although I find them confusing and really don't use them at all). ... View more

I'm assuming Join is accomplishing the same thing, is that correct? Join doesn't do anything except cycle through a list, interleaving it with the thing (like a space). It's really the list comprehension that does the magic in creating the list. How does Python know to end a loop? I'm probably glazing over some subtleties, but you can think of Python "for" loops as "for each" loops. They cycle through through all the things, then quit. ... View more

Dan's one-line example actually has a whole bunch of things going on. fld = " ".join([str(i) for i in [a,b,c,d,e] if i]) ... can be rewritten: myList = [] for i in [a,b,c,d,e]:   if i:     myList.append(str(i)) " ".join(myList) Not sure if that helps or not, just a different way to read it. ... View more

I can't find your nothing post in your prolific blog. How does IS differ from EXISTS? ... View more

The operative part is if i In short: if i: # checks if i 'exists'   do something ... View more

Ah, I figured line 602 was your importToolbox script line. Nevermind. Best of luck. ... View more

Neil Ayres​, the code does exactly what you suggest, renaming a known projection, essentially creating a "custom" projection. The equivalent using Define would be to create a custom projection beforehand and define to that. Six one way, half dozen the other (although actual performance may differ). ... View more