Latest Contributions by ChrisDonohue__GISP

This part I don't know - I have not used HEC-GeoHMS myself. My only guess would be that maybe HEC-GeoHMS is missing one of the COM modules?  However, that is just a guess. Chris Donohue, GISP ... View more

Apparently the legislation was changed over the last few months, as several organizations released statements approving of the Act over the last few days. Esri Supports the Geospatial Data Act  AAG Announces Support for Geospatial Data Act of 2017 http://www.aag.org/galleries/default-file/AAG_Announces_Support_for_Geospatial_Data_Act_of_2017.pdf  Chris Donohue, GISP ... View more

To tag onto what Xander Bakker suggested, also change the filenames or folders so that there are no dashes in any of them.  Sometimes the system blows up because of the dashes, but then provides an error unrelated to this issue.  I don't know why it happens this way, but that is just the way it turns out sometimes, and getting rid of the dashes fixes the other issues. Also, try shortening the grid and tiff filenames.  It may be that it is choking on a "too long" filename.  For whatever reason, the process sometimes seems to apply the most restrictive condition to files that normally don't have those restrictions (in this case that would be the GRID filename limitations).  It's worth a try.... Esri Grid format The name of an Esri Grid format raster has more specific restrictions: The maximum number of characters is 13. It cannot have spaces. It cannot use special characters other than underscore ( "_" ). For tools that output a Grid Stack, the stack name cannot have more than 9 characters. The total length of the name for a Grid and its path cannot be more than 128 characters. Source:  Output raster formats and names—ArcGIS Help | ArcGIS Desktop  Chris Donohue, GISP ... View more

Besides what  Xander Bakker suggested, run topology to ensure your linework is truly connected.  I mention this as much linework that represents roads, streets, pedestrian paths and such comes from CAD, which does not always snap the linework together so the lines touch.  Tiny gaps, which are not readily visible, will stop a Network analysis cold.  This is a very common issue. I would suggest loading your data into a Feature Dataset in a File Geodatabase and then run Topology to ensure the linework is truly connected.  Use the rule "Must Not Have Dangles".  Note that this will trigger on valid situations, like dead ends, so you will have to review the results and make a determination for each case that shows up. Another alternative is to employ this Add-in created by GeoNet Member Tim Witt, which automates the Topology process. Topology Check Python AddIn (6/30/17)  Chris Donohue, GISP "Network Analysis = 1% Analysis + 99% Data Cleanup" ... View more

I'd use a workspace besides the Default C:\Usename\Documents\ArcGIS\Default.gdb one.  Instead, make your own File Geodatabase and store it on a short file path.  Don't ask me why, but for whatever reason using the Default geodatabase seems to lead to issues at times when working with raster data. As for places where Minus may go awry, let me tag one of the raster experts: Dan_Patterson  Chris Donohue, GISP ... View more

For starters, is the feature class "2016_Merge" in a Feature Dataset within a File Geodatabase?  I'm guessing it is not based on the filename, which starts with a number (which would not be allowed).  If your feature class is not in a Feature Dataset in a File Geodatabase, I would suggest placing it there and then creating the topology.  Then validate, start an editing session on it, then open the Error Checker.  Give that a try and see if it resolves the issue. Designing a geodatabase topology—Help | ArcGIS for Desktop  Creating a topology—Help | ArcGIS for Desktop  Chris Donohue, GISP ... View more

The goal of DGGS is to enable rapid assembly of spatial data without the difficulties of working with projected coordinate reference systems. It does sound at first like it is almost too good to be true.  Does this mean we can get lazy and forget about pcs?  It will be interesting to see the specific implementation/standard of this and how it pans out. Chris Donohue, GISP ... View more

Tagging https://community.esri.com/community/gis/imagery-and-remote-sensing  for greater exposure Chris Donohue, GISP ... View more

There is also a way to do this with Topology.  Look at the first answer in this thread for the method that involves using the Topology Rule "Must Not Intersect": arcgis 10.1 - Adding vertices to existing lines where they intersect using ArcPy? - Geographic Information Systems Stack…  Chris Donohue, GISP ... View more

One one to do this is with Planarize.  In ArcGIS Desktop this tool is found on the Advanced Editing Toolbar.  I don't know offhand if ArcGIS Pro has it. Splitting lines at intersections with Planarize Lines—Help | ArcGIS for Desktop  EDIT: Found it. Planarize polyline features—ArcGIS Pro | ArcGIS Desktop  Chris Donohue, GISP ... View more

Some ideas are listed below.  Note - I don't know how Network Analyst does with ArcGIS Pro, but the following work with Network Analyst in ArcGIS Desktop 1.  One "quick and dirty" way to check connectivity is by running a Service Area: Use a very large distance, one that far exceeds the distance to your farthest point. On the Generate Lines tab, check on Generate Lines Then Solve for the Service Area.  Check the resulting polygon and the generated lines.  If the polygon does not cover the whole dataset, there are issues.  Use the generated lines to help pinpoint breaks. Example of street dataset with a line break.  Note the green lines generated from running a Service Area end and do not follow the road that continues in the upper left. 2.  As for what may be causing this besides breaks in connectivity, It may that a Restriction is in play.  For example, see if OneWay is set where it should not be. Chris Donohue, GISP ... View more

What version of ArcGIS are you using?  Also, how is the data stored?  File Geodatabase, Personal Geodatabase, Enterprise Geodatabase, shapefiles, other? Chris Donohue, GISP ... View more

Tagging https://community.esri.com/community/developers/gis-developers/python  Chris Donohue, GISP ... View more

It is possible there is a lock on the geodatabase from previous viewing/ Modelbuilder runs.  As one example, if there is a instance of ArcCatalog pointing at data, that can lock it. One workaround to clear any locks is to run the Compact geoprocessing tool.  This tool explicitly clears locks as part of its processing.  (Note that we are not choosing to run this tool because there are specific concerns about fragmented data related to the reported issue; instead, because we want the beneficial side effect) Compact—Data Management toolbox | ArcGIS Desktop  Chris Donohue, GISP ... View more