# Questions tagged [geometric-network]

A geometric network is a set of connected edges and junctions (nodes) along with connectivity rules that are used to represent and model the behavior of a common network infrastructure in the real world. Geodatabase feature classes are used as the data sources to define the geometric network. You define the roles that various features will play in the geometric network and rules for how resources flow through the geometric network.

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### Using Trace Network Selection in standalone script in ArcGIS Pro

I am trying to create a script that allows me to to set various starting points on a network. Then perform an upstream trace and export the selected lines to a new feature class. No matter what I try ...
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### Creating centre line of odd shaped polygon in QGIS

I'm trying to calculate a center line of an odd shaped polygon. When I've used the Polygon Tool 'Centerlines' with the setting 'All' is doesn't create center lines for all of the polygon, only part of ...
1 vote
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### ArcGIS Trace Geometric Network - Get/add sequence number for lines

I'm using ArcGIS 10.2.2 python 2.7 We have large electric grid dataset, and we want to know which OHL or Cable is first to leave from transformer(Flag) which is second and so on.... arcpy....
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### Limitations of geometric networks in ArcMap (Cost Calculation)

I am working with a point dataset and a street network within a geographic region. This region is divided in sub-divisions for which I want to calculate single networks within their area. Every single ...
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1 vote
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### Setting up a rule to connect two points that intersect two connected, but separate line features

I am a relatively junior user of QGIS (currently using QGIS 3.18.1-Zürich). In the picture below is a scenario where I would like the intersected points between a stream (each separate stream line ...
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### How to join polygon centroid points with lines to form network - ArcGIS Pro

I'm working in ArcGIS Pro with a hex grid covering a large ocean area. I need to find the shortest route from the centre points of the cells to points on the coast avoiding land. Is there a way of ...
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### Trying to identify the first upstream point from each point in a feature class (geometric network)

I'm new to geometric networks, but someone suggested it on a different question and it seems like it might have the capability I'm looking for. I see that within a geometric network you can trace ...
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### Adding multiple sources to geometric network using ArcMap

I am using ArcMap. I would like to identify all points that are on a river within 10km downstream of a starting point. I have multiple starting points and would like to do this from each of them. I ...
1 vote
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### Using ModelBuilder to update feature line length

I maintain a network of lines (geometric network) in an enterprise geodatabase and would like to automate the updating of a field after I complete my editing. The goal is to run the script nightly on ...
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1 vote
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### Using Trace geometric network in ArcPy script runs out of memory

I have written a short script to trace a geometric network representing rivers and creeks upstream from a number (10000~) of road intersections that are potential blockers to migrating fish. What we ...
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### Getting geometry network data from File Geodatabase

I have a GDB file with the power distribution utility data set. I was able to get data (File Geodatabase Feature Class) from the GDB file by using QGIS's OpenFileGDB. The remaining information which I ...
1 vote
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### Attribute network features (lines) with data from their endpoint

Goal To prioritize water lines in a network based on the building they service Detail I have a shapefile of water lines in a region. The lines are split at their vertices and form a network (more or ...
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### pgr_createTopology does not create vertices at every end of the lines of a street network

I am using pgRouting with a street network. I added lines to the network that represent straight lines from destination points I am interested to the nearest street using ST_ShortestLine(). Now I ran ...
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### GIS network tracing - water network

I have been trying to find out if it is possible to trace through a water network that will consist of line features representing water mains. Tools exist in both QGIS and ArcGIS to help with this and ...
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### Copying feature datasets weekly from EGDB to EGDB (geometric networks included)

I've been trying find a way to copy a few select feature datasets from our main production Enterprise geodatabase environment to a second Enterprise geodatabase. These datasets include geometric ...
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1 vote
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### Finding the LineString Corresponding to a Certain Road in a Roads Database

I am using tiger line road data to find roads that runs through certain points. I know what road is immediately next to the point by the road name and road type. What I currently do is grab all the ...
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1 vote
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### Trace upstream/downstream for multiple pairs of points in ArcMap

I have two point layers, one is set of origin points and one is a set of destination points, each with 608 points. Object IDs match the origins to the destinations. The points are all snapped to the ...
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### Check geometries of line

I am working with hydraulic network. I have a pipes network. I am trying to check it's geometries. I have searched many related documents, I know topolygon tool and check geometries, but it only ...
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1 vote
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### ArcPy for loops increase duration with each iteration

I am running an ArcPy script with IDLE 2.7 For each line in a geometric network, it traces the path to a fixed location from that input line. For each input line, it does this trace with all other ...
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### Using more than a single layer as barriers in arcpy.TraceGeometricNetwork_management()

I am working on script that iterates through trace flags and traces upstream. For each trace flag, I have selected features from multiple layers in the geometric network that I want to act as ...
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### Spatial Adjustment of Many Points in Geometric Network

I have been receiving surveyed water valve data and editing our point feature class accordingly. The current procedure is to use the attribute transfer mapping tool and click from source layer to ...
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### Slow SDE Performance After Append - Geometric Network

I had an odd thing happen today, I do almost daily appends to our fiber network (fiber, splices, etc) and usually, it goes smoothly and with no complications. For some reason, I had an Append stall ...
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### Batch network tracing?

I have a large (3,000+) set of drainage polygons that I derived from the ArcHydro Stormwater Processing workflow. I would like to aggregate them based on the geometric network elements they contribute ...
1 vote
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### Fixing Discontinuous Stream Networks using ArcMap

I am currently working on a project in ArcMap 10.6.1 involving urban sewershed delineation, however, I am stuck with a discontinuous stream network. I took a LiDAR DEM from NOAA and subjected it to ...
349 views

### Identify layers in an .mxd that are network elements feature types

I need to create new feature classes from all layers in an .mxd, and also create a new .lyr file for each of the newly created feature classes that retains the symbology of the original map layer. The ...
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1 vote
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### Create Geometric Network Geodatabase Failed

I recently attempted to run the Create Geometric Network Geodatabase tool which is part of a water outage template download and process offered via the ArcGIS Solutions Deployment Tool within ArcGIS ...
1 vote
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### ArcGIS: Extract portion of a geometric network that exists 30 mi downstream of intersection with another layer

I have flow lines for streams. I've made them into a geometric network. The streams intersect with a rail network. I want to find all of the points of intersection and then get all of the flow lines ...
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### Automatic creation of polygons

How do you automatically create adjacent polygons in QGIS whose size depends on an attribute of another layer? I have a layer with community areas and the corresponding number of inhabitants and ...
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### What is "Current Status" (IMMCurrentStatus) in ArcFM Downstream Trace?

I'm trying to develop a custom downstream trace Addin for ArcGIS using .net (C#) Miner.Interop.Framework Assembly. I'm using TraceDownstream Method from the ArcFM Desktop Developer Guide and ...
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### Pipes do not connect to each other - geometric network

I have created a geometric network in ArcGIS for Desktop. Some of the pipes are not logically connecting to each other even though they appear to geometrically intersect. Can anyone tell me how to ...
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### Geometric networks (networkx) in PyQGIS

I'm working with code from the Disconnected Islands plugin in QGIS x64 and Python 3. Normally, the plugin uses networkx to create a geometric network and ends by writing the FID of features with no ...
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### Disconnected features in Python, QGIS

I'm working with code from the Disconnected Islands plugin in QGIS x64 and Python. Normally, the plugin ends by writing the FID of features to a CSV and their corresponding network group ID. Instead, ...
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### Using Geometric Network toolbar?

I've been using the Geometric Network tools for quite sometime now to trace electric distribution networks for my job and all of a sudden when try to trace the circuits and connected features from ...
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### Added lines to an existing feature class and geometric network are not included in a geometric network trace

I have a stream layer for a watershed. These streams are topologically correct where each line's geometry stores the correct flow direction and each end connects to the start of the next downstream ...
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### Creating Hydro Hierarchy in ArcGIS Desktop? [closed]

We recently ran at work into this model created by ESRI for the rivers in the US: https://maps.esri.com/rc/radial/index.html Code: https://github.com/richiecarmichael/Esri-Hydro-Hierarchy In order ...
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### Calculating Distance from Outlet to Dam(s) using ArcGIS Desktop?

I am trying to carry out what should be a relatively simple analysis of river network fragmentation by dams. Similar questions have been asked as: Obtaining length of river upstream of points up to ...
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### Arcpy code to loop trace geometric network give out of memory error

I have a distribution of points on a geometric network. I have code to select a point, run an upstream trace on the network, select intersecting polygon features, sum some attributes from those ...
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1 vote
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### Adding new field to feature class?

I'm using one of the esri model sewer system geodatabases. It includes empty feature classes and a geometric network. i need to add a field to one of the pre-made feature classes, but it won't let me....
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### ArcGIS Trace Geometric Network Tool Trace using Find Common Ancestors gives error

I have a geometric network stored in an ArcGIS 10.5 geodatabase. These lines represent all the river paths in a watershed. The lines associated with this network have the required flow direction ...
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### Drawing a map using time as metric instead of distance in QGIS

I am used to drawing maps in QGIS and overlaying on top them a road network map showing the distance between places, its a useful way of showing information about roads. But I am aware that its not ...
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### Storm water Geometric Network Tracing Catch Basins

I am using ArcGis 10.3 and am trying to trace a geometric network from a catch basin to a catch basin lead to a mainline ultimately to a storm pond. Flow direction is set correctly using digitized ...
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### PostGIS recursive query in order to find the longest connected subnetwork in my line network

Let's said that I have this line network: The goal is to find the longest connected subnetwork. So I want to find all the line's ID that are connected to the line with the ID = 1 because I know that ...
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### How to create "roof line" for a general polygon area?

I have a polygon with an arbitrary shape ( assume that it is well-formed with no self intersection, no duplicated points etc), and I need to subdivide the polygon into sub-polygons like how one would ...
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### Count features on geometric network between two points

What geoprocessing tool or process will let me count the point features on a geometric network between a specified start and end point?
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### Why are multipart features not allowed in Geometric Networks?

I'm beginning to familiarize myself with Geometric Networks in ArcGIS Desktop, and according to About Verify Network tools and commands, multi-part features are not allowed, but they do not explain ...
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### Create a Geometric Network - Error

I'm trying to create a geometric network in a FILE GEODATABASE, but I get: Error: Cannot create geometric network. The selected feature dataset does not contain any feature classes which can ...
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### Cluster Points on spatial network in R/QGIS

I am searching for a method for clustering spatial points along spatial lines. The points are connected to the lines. I tried nearest neighbour clustering and gProject/gInterpolate from the rgeos ...
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### Creating Adjacency Matrix using SpatialLinesDataFrame and SpatialPointsDataFrame in R?

I am trying to create an adjacency matrix of power plants that are connected via power lines. The plant data is point data (~8000 observations) with longitude and latitude measurements. The line data ...
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### Link the edges and the nodes with a relationship class table in a geometric network

I have a bus network in arcgis composed by: The Bus stops (points) The Bus lines (multilines) A relashionship table who link the stops and the line So the relationship (Many-to-Many) contains a ...
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