Latest Contributions by ChrisDonohue__GISP

Some preliminary questions to help get a better understanding of the issue and what resources are available on your end: Are you using a Geometric Network,  a specialized geodatabase (like one of the ESRI utility specific solutions), or a standard line feature class(es). What software are you using and what version? A preliminary suggestion: The first thing that comes to mind is to use the Summary Statistics tool based on an ID that represents the segments between the tee and meter.  Specifically, when running the tool, the Case Field would be the field that represents this line ID,  After you get the results, one could manually calculate the percentages of each component, find the highest percentage for each line to then derive the predominant segment type. You'll have to play around with the settings to find the combination that matches your data and desired output, but I believe this will get you most if not all the way unless you have a specialized database (see above questions)  Summary Statistics—Help | ArcGIS for Desktop Chris Donohue, GISP ... View more

I have it on ArcGIS 10.2.1 and it is a separate Extension.  It doesn't come automatically with an Advanced license. ArcGIS Help (10.2, 10.2.1, and 10.2.2)  The newer ESRI Help, unfortunately, seems to automatically assume everyone has the latest and greatest in software, so you have to take what you find with a grain of salt. Chris Donohue, GISP ... View more

Can you elaborate on what you are currently viewing that makes the image different than what you expect/desire?  Is your current image totally different than what you posted?  Is it close but slightly different?  There are several places where things can go awry with imagery, so post more details. Chris Donohue, GISP ... View more

And I may have been overly optomistic for the 1% value.  Maybe 0.1% would be more realistic...  Joe Borgione  Chris Donohue, GISP ... View more

To add to what Dan and Joe suggested, try the following to troubleshoot your network, as it seems disconnected: Oftentimes street data seems fine visually, but has very small disconnects. These disconnects can be small enough to not be visible, which makes finding them a challenge.  The is a common challenge with Network Analysis. For a quick check of where things have gone awry, one can use Network Analyst to run a Service Area using a very large value for Default Breaks in the Analysis Settings (so it will try to cover your whole network) and with Generate Lines checked on in the Generate Lines tab.  Then look at the output lines and see where they are not covering your street network. In terms of more detailed finding and fixing of disconnects, run Topology on your street lines.  The key topoligical Rule to implement is Must Not Have Dangles.  Note, however, that there are many valid Dangles in street networks (example:  dead end streets), so this will entail quite a bit of data review. Chris Donohue, GISP Network Analysis = 1% Analysis + 99% Data Cleanup ... View more

There are several things that could be causing this. Some things to check: Check to see if the original Geotiff you downloaded already has a coordinate system assigned to it.  If it does not, you want to use the Define Projection Tool.  If it does and it is in a different coordinate system than you want, use the Project Tool.  I usually find that GeoTIffs come with a coordinate system already assigned, so my initial guess is that you want to use the Project Tool.  When to use the Define Projection tool and the Project tool? | Support Services Blog  When running the Clip, check the Environments settings on the tool (click on Environments button and then expand the many topics).  It may be that it is defaulting to a different setting(s) than desired.  Setting geoprocessing environments—Help | ArcGIS for Desktop    Also, it may be beneficial to use a Snap Raster.  This is set while in the Environments settings. How the Snap Raster environment setting works—Help | ArcGIS for Desktop  If none of these work, report back on what you found out.   while the above are the more common issues, there are also several other things that could of gone awry.  For example, Tiffs often come with a header line in the raster itself that acts as a world file, so even though a separate world file (.tfw) is not visible, it still using the "built-in" one.  But that is less common. Chris Donohue, GISP ... View more

Not to get too far off subject, but Python will handle forward and back slashes.  But forward slashes are easier to implement.   Also, from an ESRI blog: Notice that in calling the clip tool, we used forward slashes (/). Back slashes () and forward slashes work equally well in ArcGIS on ALL platforms, so you don’t need to worry about switching back and forth when you change to Windows. You can even use back slashes on Linux and Solaris. The problem is that in Python, back slashes are a special character, so to use them, you have to treat them differently than most other characters. - You can escape them: “\some\path” - You can use raw strings: r”somepath”         - You can use unicode strings: u”somepath” If you stick to forward slashes on all platforms, you improve the look of your code and reduce the effort it takes to type it. Source:  Tips and tricks – Unix, Python, and Geoprocessing | ArcGIS Blog  Chris Donohue, GISP ... View more

To expand on  Dan's suggestion, here's how to format the code in GeoNet (a process which is not obvious).  Since spacing is important for Python, getting the code formatted can aid in troubleshooting by GeoNet responders.  I know you stated you tried the syntax highlighter, but just wanted to be sure the complete instructions were available. Posting code with Syntax Highlighting on GeoNet  Chris Donohue, GISP ... View more

One thing that works is to add a Get Count and then set a Precondition for the function that you want to trigger to keep it from operating if the Get Count condition is not true.  Note that this is not real obvious on how to make this work. As an example, in this case the Model is set up to copy 5 feature classes from one Feature Dataset to another as long as the feature class contains at least one record.  So in this example, ParcelSet3 has no records (I deleted them all before running this), so was not copied. Get Count—Help | ArcGIS for Desktop  Another possibility would be to do some branching with For If loops in Python and then use those as to make script tools to incorporate into to your model.  ArcGIS Help (10.2, 10.2.1, and 10.2.2) - If you are stuck at "If" - Modelbuilder Or if you are good at Python, skip Modelbuilder and do the whole thing in Python.  As a shortcut, one can dump out the Modelbuilder stuff you already have as Python snippets to help get started. Chris Donohue, GISP ... View more

I don't have an automated solution, so if someone posts one I would be interested in hearing about it.  Here at the City I work for my group has 4 GIS folks who edit the thirty-odd layers we have with manually-generated Unique ID's, so this issue has come up quite a bit. We often have two or more people working on Versions of the same layer and on top of that some of us have more than one Version of that layer also (example:  several subdivision projects being entered). What we have settled for is a plain old Tracking "spreadsheet" table in Word where users note each "range" of unique ID's they are taking for each Unique ID for each feature class in each of their Version(s) so we don't inadvertantly duplicate unique IDs. One potential solution we have looked at is to use system-generated Global ID's.  However, we have several non-GIS systems tied to SDE that don't find Global ID's appetizing, so have stuck for now with our own unique IDs.  Also, be aware that dumping out feature classes with a Global ID to a File Geodatabase will cause the Global IDs in the FGDB to be different than what they were in SDE, so one has to keep that in mind. GlobalID | Definition - Esri Support GIS Dictionary  Chris Donohue, GISP ... View more

I don't know ArcObjects, but can throw out some ideas from the user side of versioned editing to see if that rings a bell and correlates with an ArcObject process/method. In SDE, there is a Version Changes command and tool.  Maybe the ArcObjects part of this is exposed so it can be implemented?  Using the Version Changes command—ArcGIS Help | ArcGIS for Desktop  Edits to Versioned data is tracked by Delta tables.  If you can access the Add and Delete tables and they have records, then the version was edited.  Maybe there is an ArcObjects way to query them? Chris Donohue, GISP ... View more

Just a thought - try setting a snap raster in the Environments settings to be your raster.  On one hand it seems like you are using the same raster over and over, so it should not matter since it typically is used when there are two or more rasters with differing properties; but then again sometimes this stuff gets finicky.  It's probably worth a try. Snap Raster (Environment setting)—Help | ArcGIS for Desktop  Chris Donohue, GISP ... View more

Can you elaborate more on a few more aspects of your project to help GeoNet responders provide useful ideas: What version of the software do you have?  Are you using ArcGIS Desktop, Pro, other? How is your data arranged?  Is it point data?  Line data? Will you need to do statistical analysis to create the clusters? Python is very commonly used with ArcGIS; can you comment further in regards to "even if it involves usage of python"? One general comment - Network Analyst is typically used for routing, not for mapping per se.  That said, people do find new and interesting uses for this extension from time to time.  Do you have a Network Dataset already developed and a Network Analyst process underway? Chris Donohue, GISP ... View more

Besides what Joe suggested, one can also do the "old-fashioned" trick of making a polygon feature class to use as a mask, then adding polygons to that feature class that cover up the areas that you don't want to be visible.  When the last bits are covered, move the layer to the top in the Table of Contents and change both the border color and fill to white (or whatever color is your background color).  This will effectively make the stuff you don't want seen disappear. Chris Donohue, GISP ... View more