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It may be that the settings you have chosen are different than what ESRI has for their network dataset. I have not used ESRI's service, but I wonder if the settings are exposed? That way you could compare them to yours. It could be as simple as different choices for Impedance or Turn Restrictions. Another potential factor is the data itself. It may be that the data is different. For example, you may have more modern information, where the ESRI data may be missing streets. Chris Donohue, GISP
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06-14-2018
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I found this, but have not tried it myself: Manage history If you open the project at a later time to continue your work, all of your geoprocessing history will be available for review. You can easily reopen and run any of the tools in the history by double-clicking the entry. If you do not want the geoprocessing history maintained with a project, you can remove it. To remove individual tools, right-click an entry and select Remove. Single or multiple selected history entries can also be removed using the Remove button. Source: Geoprocessing history—ArcGIS Pro | ArcGIS Desktop There is some Python that works for ArcGIS Desktop that possibly may work for ArcGIS Pro. They don't explicitly mention ArcGIS Pro as one of the software packages when they list them at the bottom of this article, so it would take some experimenting. How To: Delete geoprocessing history from a geodatabase Chris Donohue, GISP
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06-08-2018
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A general observation - when folks find they need to use iterators with conditions, that often is the point they end up going to Python scripting instead of Modelbuilder. That said, there are some options in Modelbuilder to do what you are looking for. But Modelbuilder is limited in this regard. It will depend in part on how complex a condition is that you want to trigger the end of the run and whether the data is structured to support this. Some possibilities: Use a While Iterator (likely part of a "model within a model strategy" as mentioned by Joe Borgione ) While—Help | ArcGIS for Desktop Use a Stop "Model-only tool". This can be useful if one does not want to do the "model within a model strategy" Stop—Help | ArcGIS for Desktop It may be possible to write a short bit of Python code to do the check for when to stop, then import that into Modelbuilder as a script tool and then add it to the Model. A quick tour of creating tools with Python—Help | ArcGIS for Desktop There are Iterator properties that can be set at the Model-level that may do what you want. In the Model itself, click on "Model" in the top menu, then "Model properties...", then in the window that pops up the "Iteration" tab. There are several possibilities here. This may also be useful in conjunction with a script tool that checks for the condition, then sets a variable false when that happens. Chris Donohue, GISP
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06-08-2018
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The folks on here who do Remote Sensing work can probably chime in with specifics, but yes there are imagery resources out there that one can download for use in change detection. The first one that comes to mind for me is Landsat, but there are many others. One key limiting factor, though, will be which part of the world you are interested in and for what time intervals. The further back in time one goes the less data is available. Also, obviously you will need to evaluate each imagery platform available to see if the sensor data you can get matches what you intend to do. For example, does the sensor have enough resolution and does it capture the part of the spectrum you need. Landsat Data Access | Landsat Missions Tagging: Imagery and Remote Sensing Chris Donohue, GISP
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06-08-2018
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There are several strategies to do this. Here's a couple that can work if the data is in two or more feature classes (shapefiles): Select by Location Using Select By Location—Help | ArcGIS for Desktop When using this process, look at the various "spatial selection options... " that can be chosen in the tool. Buffer the river polylines by a distance, then Select by Location using the buffer as the basis to select lines. Buffer—Help | ArcGIS for Desktop Also, can you expand on how the data is organized? Are you working with all the lines in one feature class or more than one? I.e there is just a rivers shapefile or instead there is a rivers shapefile and say a roads shapefile. Chris Donohue, GISP
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06-07-2018
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Just a quick workflow idea that could be tried if you have access to Spatial Analyst or 3D Analyst. Untested, but I think this could work. It would need to be fleshed out with the specific processes (this is just the basic process). Convert the polygons to lines Combine into one feature class (if not already) Add an integer field called "Elevation" Populate one line with zero and the other with 100 Convert the lines to a surface (raster) Contour the surface, specifying an elevation of 50. This will essentially produce the result you are seeking. Convert to vector, then Convert the lines back to polygons. Chris Donohue, GISP
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05-31-2018
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There's probably a refined way to do this, but I can think of an immediate workaround that may suffice barring an elegant solution that can be provided. What one can do is place three copies of the feature class in the Table of Contents, then use a Definition Query to limit each feature class to one set of conditions, then apply the appropriate color ramp for each. Display a subset of features in a layer—ArcGIS Pro | ArcGIS Desktop Chris Donohue, GISP
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05-29-2018
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To aid in finding a solution can you provide some more context: Which GIS software are you using when this occurs? ArcGIS Desktop? ArcGIS Pro? Something else? Which process is being employed to export to Excel? Table to Excel (Conversion) Geoprocessing Tool? Direct export? Third-party tool (like XTools)? Other? What format is the source data in that is being exported? Geodatabase? Shapefile? Coverage? Excel Table? .dbf? Another format? Before export, was the data Joined to another data layer? Does the error message come up in the software that it is being exported out of or in Excel? Is there any other information with the error message besides "Error 221"? For example, is it presented as an error box and if so, does it have a title? Does any data actually get exported? If so, how does what did get exported compare to the original? Chris Donohue, GISP
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05-25-2018
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One workflow would be this: 1. Run Merge on the two shapefiles. Merge—Help | ArcGIS Desktop 2. Run Dissolve on the result of the Merge. Dissolve—Help | ArcGIS for Desktop 3. Then field calculate the lengths (Calculate Geometry) to update them (as you are using shapefiles, which don't auto-update like feature classes in a geodatabase). Assumptions: 1. The shapefiles are coincident in that the river segments that do overlap are in the same location. If they are not, for example say they were collected at different accuracy's and are off by a foot from each other, this process will not work. However, If they are off, there are processes to try to fix that. If so, post that and we can suggest a few. 2. The shapefiles only are of polluted features - ie they do not contain segments of unpolluted features. If they do contain unpolluted segments, a pre-processing step will be needed to thin down the shapefiles to just the polluted segments before running this process. Chris Donohue, GISP
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05-25-2018
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If you have access to it, Network Analyst is the way to go. Of course, that can easier be said than be done, as its a less-commonly used Extension, and if it is not available in your organization one will have to weigh buying it. Also, using it can be interesting, as there is a learning curve to it and the data preparation can get pretty intense. But if you have it and a network dataset already set up, it is an easy process to run a Service Area and then extract the roads that can be traversed for 1.5 miles from your fire station point. Another option if you see that the cost and/or work in doing the data prep is too prohibitive is to consider hiring a consultant to do it for you. (Both Joe Borgione and I used to do this when we were in the Private Sector). Chris Donohue, GISP
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05-24-2018
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Can you elaborate on your question? For example: Is the goal is to find how far from a Fire Department point one could travel on roads 1.5 miles? If so, one could use the Network Analyst Extension to run a Service Area. Service area analysis—Help | ArcGIS Desktop Is the goal to find all roads within 1.5 miles of the Fire Department "as the crow flies"? If so, one could run a 1.5 mile Buffer of the Fire Department point, then use the output of that process to Clip the road layer. Buffer—Help | ArcGIS for Desktop Clip—Help | ArcGIS for Desktop Chris Donohue, GISP
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05-24-2018
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Polygons are much easier than working with street data.... Chris Donohue, GISP
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05-21-2018
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That's not bad. Better than the first two ideas I posted. Chris Donohue, GISP
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05-21-2018
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Some ideas of the top of my head. Neither will totally solve the challenge, but may spur ideas: 1. Contact the County Assessors office for the Right-of-Way (ROW) polygons and then use the Merge geoprocessing tool to combine them with the Urban Renewal polygons. Then Select ones that belong together while in an editing session and use the editing Merge to then come up with one large polygon for each set of urban areas. This may entail some Cutting of the ROW parts to match the urban areas. 2. If the ROW polygons are not available, find some overall large polygon feature class that extends beyond the Urban Renewal polygons and use the Erase geoprocessing tool to come up with the difference. Then Merge the Erased feature class with the Urban Renewal polygons. In editing mode cut the added Erase polygons where need be, then in editing mode use the editing Merge to join them together. Alternately, it may work to use Eliminate for this last part. Eliminate—Data Management toolbox | ArcGIS Desktop 3. Just a guess - I bet there is a raster way to do this. Or with Bounding Boxes. This guy might know: Dan Patterson Chris Donohue, GISP
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05-21-2018
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Here's a workflow that probably would work: 1. Do a Spatial Join to add the parcel identification to the buildings layer. Spatial Join—Help | ArcGIS Desktop 2. Use the shape.area field (or whatever area field is in the database you are using) to find the largest building in each parcel. Save these features as a separate feature class. (There's probably an automated way to find the largest building polygon for each similar parcel ID when there are multiple buildings, but at the moment that process is eluding me) 3. Run Feature to Point with the Point Location (optional) setting set to Centroid on the largest buildings found in step 2. Run the tool again with the the Inside option to see if that works better for your data. Feature To Point—Data Management toolbox | ArcGIS Desktop 4. Make a copy of the parcel address point feature class. Run Snap on the copy of the parcel address point features (not the original, as this tool will permanently modify the features). Snap—Help | ArcGIS Desktop Chris Donohue, GISP
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05-21-2018
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