Latest Contributions by DanPatterson

Anna Studwell‌ Spyder is currently 4.1.3 with 4.1.4 due out "soon" to address a "jedi", "python-language-server" issue. You could update now, but then you might have some issues and since you are trying to set up a protocol for a class I would wait to update yours. Spyder 4.* is really a great move from the 3.x suite and well suited for students. Also... I am on ArcGIS Pro 2.6 beta 1, so that will be coming out before classes, around the user conference time period. My recommendation would be to wait until you see 4.1.4 being the Spyder version to update to before you upgrade spyder. Also, "follow" me on GeoNet so you can message me with other questions. Dan Patterson  is the new "me", this post is by the old me when I was still teaching. ... View more

Classify LAS By Height—Help | Documentation  can you elaborate? is this the tool you are referring to? or another one from the toolset? Change LAS Class Codes—Help | Documentation  ... View more

web mercator isn't a suitable projection for measures of area FAQ: Why are my map, distance and area measurements wrong when using WGS 1984 Web Mercator?  ... View more

What happens if you remove subset_selection and leave it empty? SUBSET_SELECTION —The resulting selection is combined with the existing selection. Only records that are common to both remain selected. ... View more

Julia Brodsky‌ lines 32-33 and in my last post.  You are setting "lyr" visible multiple times potentially (lyr2 in m.list... ) My question was... do you mean to set lyr2 visible?  in other words, did you drop the 2  ... View more

Disperse Markers—ArcGIS Pro | Documentation  You need a feature layer, you have a featureclass ... View more

try putting counter += 1 after the cursor.updateRow line ... View more

Anna lee‌ ,.. you can specify a distance threshold, it is one of the options  BUT it won't do road distance, you would require the Network Analyst extension to do that ... View more

Bert Kraan‌  Don't see one for 'dummies' but this is the documentation that I refer to Getting Started | ArcGIS for Developers  Arcade Function Reference | ArcGIS for Developers  ... View more

amongst many options, you can use Select Layer By Location—Data Management toolbox | Documentation available in arcmap and Pro various intersection tools etcetra are available depending on what you want the to do with the data ... View more

The behaviour changed, I suspect because of the need to ensure the checks I indicated. I suggested ways to find out what the paths are, but I suspect most people appreciate not having long paths wrapping around the oval. The behaviour is the same in Beta ... View more

that capability is a function of the python ide.  It may not be implemented in the included python window because of the overhead needed to implement it.  Jupyter notebooks within pro implement a form of it Notebooks in ArcGIS Pro—ArcPy Get Started | Documentation  and other ide's (like Spyder) do so as well ... View more

You can close this thread out then...  ... View more

This is effectively a "circle through three points".  Either the circle solution or a "best-fit" solution. Assuming that the 3 points are on the same line, you can convert the data so that the x-variable is distance and the y-variable is your z. Your distances would be 0 (ie the start point), distance to sag point, distance to end point. Your z values become y. Solve for the equation and generate other points as needed. The equation would be degenerate if the line was completely straight. Assumptions: This would work best if the sag point were in the middle of the span. The length of cable relative to the distance between end points should be "uniform" so that the cable behaves in a similar fashion along its total length. (sloppy install with over or under tension will result in different deflections per unit length) If there is significant elevation differences between the start and end points, the location of the sag point may shift significantly to the lower elevation end and the circle assumption would be void. In those cases, you would have to consider a best-fit circle or ellipse through the points rather than a circle itself. Best fit ellipses could be used, but "usually" at least 5 points are needed but code exists to handle situations like yours, but the effort is large. There is little point in working on this with 3 dimensions given that the span should form a straight line with the sag point somewhere along the line.  Translation and rotation to and from the initial coordinate system is covered by standard affine equations. Final note.  Before you begin on this venture, it would be useful to examine some of your transformed data to get an initial estimate of sag location and value relative to span length and span elevation difference. ... View more