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Questions tagged [trace]

in this context applies to digitizing tools for tracing lines

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2answers
43 views

Selecting/tracing part of line feature using QGIS?

I have a shapefile which comprises a number of lines, each representing a bus route. I'm wanting to create a new bus route which is the same as an existing line to a certain point, but then branches ...
1
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1answer
23 views

Tracing Intermittently Working in QGIS

I'm trying to cut/create polygons in QGIS 3.2.1 using snapping/tracing, but it only works intermittently - it will follow an existing vector line quite happily for a short distance, then drop it, then ...
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1answer
18 views

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 ...
-1
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1answer
56 views

Find minimum downstream flow distance from each polygon to any polygon in other feature class

The Problem: I have two polygons feature classes, let's call them "SourceAreas" and "DangerAreas". For each SourceArea, I need to know if water could flow to any DangerArea and if so, what is the ...
9
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1answer
2k views

Seeking AutoTrace/Trace Tool in QGIS 3?

Have made the move to QGIS 3 but am having trouble locating the AutoTrace/Trace tool. I have enabled advanced digitizing tools where the magnet button sat in QGIS 2.18 but it is not there in QGIS 3. ...
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2answers
58 views

Tracing or snapping to polygon border for measure tool

I am trying to do a simple measure of the length of seperate sides of a polygon depending on which other polygons it borders (in the image: the dark blue borders of the green polygon to the white area ...
1
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2answers
468 views

Line tracing on scanned map in QGIS

I want to extract contour from scanned map, but that map is scattered very much, so it is impossible to extract automatically. So I make line shapefile and try to use tracing tool but I cannot do ...
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0answers
114 views

Line detection on binary image in QGIS

I am beginner of QGIS. The purpose of using QGIS is making contour line and 3d visualization. I practice to make contour with DEM and it is not hard, but in my work, I have to treat contour line on ...
2
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0answers
228 views

Troubleshooting pythonw.exe has stopped working with Trace Geometric Network?

I have not yet pulled this down to a code snippet that has just enough in it to reproduce the error below that I am getting when I run my code in IDLE. pythonw.exe has stopped working Windows is ...
2
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0answers
82 views

Using group layer created by Trace Geometric Network to copy out selected features in ArcPy without ModelBuilder? [duplicate]

This question comes out of my efforts to try and use the answer by @KHibma to Performing water valve isolation trace using ArcPy? I am trying to use the geoprocessing package linked to in that answer,...
3
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1answer
249 views

Performing water valve isolation trace using ArcPy?

The utility that I am working with for a couple of weeks has access to the ArcFM Water Valve Isolation tool which enables them to point from ArcMap at a location on their SDE Geometric Network and be ...
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2answers
1k views

How do I get a .csv file of thousands of GPS coordinates along a stretch of a highway? (GPS Trace?)

I need a large amount of [latitude, longitude] data points along Texas' I-35 from Hillsboro to Salado. Essentially need a GPS Trace with minimum ~1,000 points.
2
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1answer
93 views

How to use QgsMapCanvasTracer/QgsTracer in custom tool?

I've made a custom tool for digitizing polygons in qgis, similar to build in Add Feature tool but with some modifications. I need to integrate tracing into that tool also, but I haven't figured out ...
1
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1answer
114 views

Geometric Network trace in ArcGIS: trace downstream with loops included

I am looking for a way to make a “trace downstream” in a geometric network in ArcGIS where loops are included too. With the trace-operation “trace downstream”, the loops are not included. I know ...
0
votes
1answer
100 views

Any way to create polygons with brush-like tool?

I’m making a hiking map for a small range of mountains. I’d like to show surface coverage, including a few broad categories of vegetation type, rock, sand, etc. I’d like to do this as vector data. I ...
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0answers
95 views

Trace Upstream, recording the total length or number of segments at each flag

I am somewhat new with geometric networks in ArcGIS, and I am trying to find a way to automatically record the the total number of poly line segments or total length using the trace upstream function ...
1
vote
1answer
232 views

Using FnodeTnode Tracing Extension in MapInfo?

I have downloaded FnodeTnode Tracer plugin from Pitney Bowes plugins repository website. It was just the MBX file that I have to regester it into my MIPRO and did it. I have water distribution ...
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0answers
104 views

How to build Geometric network in MapInfo?

I have sample dataset of Water network. I wanted to make it geometrically connected network. I was trying to trace the network end to end, I have used "FnodeTnode tracing" plugin, but I was not lucky ...
2
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1answer
95 views

Filter edges in a geometric network trace?

I need to trace a geometric network of sewer pipes, but I'm only interested in storm pipes. More specifically storm pipes that connect directly to a starting flag, and not those downstream/upstream of ...
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2answers
111 views

Unable to create geometric network on NHDFlowline - invalid enabled field type

I need to create a geometric network in order to perform a downstream trace on a NHDFlowline data in my ArcGIS. I have two flowline layers on one of them I am able to create a geometric network and ...
2
votes
1answer
293 views

Creating route (by hand) over a road shape in QGIS?

Is it possible to create a route placing some waypoints by hand? I mean, I don't want the program (QGIS) to link consecutive points with a simple line. I want it to link the points following the road ...
2
votes
1answer
79 views

flag problem in network trace in arcmap

i want to trace using a weight filter but we i have the case, that 2 edges are overlapping and they share the same 2 junctions. Now if you want to set a flag, you won't be asked if you want to select ...
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0answers
262 views

Is it possible to trace basemap features?

I'm looking for an easier way to digitize. Does anyone know if it's possible to trace basemap features (OSM/stamen/etc) in QGIS (2.12)? For example, as opposed to creating various vertexes along a ...
1
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1answer
373 views

Finding distance up geometric network?

I have successfully been using the trace upstream in ArcGIS with 10,000+ points as flags to find what polygons are upstream (using a select of the polygons than intersect the upstream trace). Now I ...
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2answers
90 views

Grid tracing not wanted when using Trace tool for editing in ArcGIS for Desktop?

So I am using the trace tool to complete polygons. The problem I am running into is that the trace tool will run along my grid lines. This is easily avoided if the polygon is easily distinguishable ...
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2answers
1k views

Implementing Trace Geometric Network into Model Builder

I would like to use Trace Geometric Network in model builder with the option to have a model parameter for the flags (like the flags I add from Utility Network Analyst Toolbar) and return the results ...
2
votes
0answers
966 views

Accessing results of trace geometric network tool in Python AddIn? [closed]

I'm attempting to write a python addin to ArcGIS that will carry out numerous traces on a geometric network using user specified flags/barriers. The first trace works fine and I'm able to access the ...
2
votes
1answer
503 views

Is it possible to set the layer which the trace tool traces?

Let's say I have at least 3 Layers. I want to reshape a polygon of layer 1, tracing a polygon from layer 2. This is no problem if you have only those 2 layers. But now I need layer 3 (or 3 to 10) ...
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4answers
513 views

Using weight in geometric network to Find Path Upstream

I have a problem about using weights in geometric network in ArcGIS Desktop 10.2. In the example below, I have a simple network with a source & some junctions. I'm trying to use the Find Path ...
2
votes
1answer
504 views

Geometric Network Downstream River Tracing?

I'm using ArcGIS 10.2 Desktop and I need to trace downstream on a river network from a Discharge point to another point where the river intersects polygons of interest. The distance from each ...
1
vote
1answer
1k views

Trace tool being very erratic in ArcMap? [closed]

Right now I am working on a project where I have a road network, and I have a layer with points on a bus route. I am trying to trace these points along the road network to create bus routes. It was ...
1
vote
2answers
723 views

How to add barriers and flag to geometric network through code

I'm developing an ArcMap add-in that will run a trace against a water main that the user has selected using the selection tool. The geometric network is already defined and I can run the trace by ...
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2answers
673 views

Snapping polygons while reshaping edges?

I have two Polygons, A and B, in two shapefiles. Is there any automatic way to reshape the edge of Polygon A according to the edge of Polygon B?
2
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1answer
103 views

Find connected features by type in utility network?

I have a storm drain geodatabase with digitized direction flow. I am trying to find catch basins (upstream) that drain to other catchbasins (downstream) as opposed to a junction structure or an ...
1
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1answer
128 views

ArcMap trace the creation/modification/deletion events by windows user for all changes (not only the latest change)

I want to check whether there is a way to trace all the creation, modification and deletion events in the editing session. What I aware now is how to get the latest updated information of an object in ...
5
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1answer
451 views

editor tracking updated in attribute table, but not in sql server database

When I enable editor tracking and make modification on an object, I can find the edit user and edit time, but I cannot find the data updated in the sql server database. Is it because of the versioning?...
1
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1answer
52 views

ArcMap trace the creation/moving/deletion events by windows user

I want to check whether there is a way to trace the creation, moving and deletion in the editing session by windows currently logged in user. What I only know now is how to trace the creation/moving/...
3
votes
2answers
4k views

Creating new lines along specifically selected existing lines using QGIS?

I have tried to find a solution for this everywhere, with no result... My problem is that I want to be able to manually draw a line that automatically snaps to a line (creating an exact copy of the ...
4
votes
3answers
2k views

Measure feature by tracing

I'm trying to measure how far along a river polyline a feature is using the measurement tool in ArcGIS. Is it possible to trace the polyline (in a similar method to the trace tool in an edit session) ...
0
votes
1answer
329 views

Certain points cause Trace Geometric Network tool to crash

Using ArcGIS Desktop 10.2.1. I have a set of about 600 points that I’m using as the flag input on the trace geometric network tool. Every time I ran the tool with these points, it crashes, along ...
2
votes
0answers
44 views

Why is node tool deleting unselected points in lines?

I am freehand editing lines to a shapefile on Mac QGIS 2.2.0, and have my snap settings at vertex and segment @ 20 pixels. The lines are roadways and I have merged them all into one feature and merged ...
1
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1answer
254 views

Stream Trace to Select Attributes

I'm trying to work on a school project, but I only need streams up stream from a certain point. As you can see in the picture, I've run the stream trace tool upstream from a point i've created. I'm ...
1
vote
2answers
245 views

Trace vector map from GeoTiff, Garmin

My goal is to create a vector map for my Garmin GPS by tracing over a topo raster. The vector data would be exported in ESRI SHP format and later converted for Garmin. So far, I can load the geo ...
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0answers
155 views

Problems with QGIS plugin traceDigitize on Mac?

I'm trying to get the traceDigitize plugin to work with QGIS 2.0.1 on my Mac while following this tutorial but I get this error as soon as I ctrl-click: An error has occured while executing Python ...
6
votes
2answers
3k views

Can QGIS Trace Features?

I generally have an doubt about QGIS. Is it possible to Trace the feature in QGIS? As in the case like ArcGIS for Desktop which has a tool called "Trace" in its Editor Toolbar? If yes, how we can do ...
3
votes
1answer
2k views

Tracing Boundary Around a Polygon Shapefile in QGIS

I'm looking to create a boundary around this shapefile of street blocks to have show the city limits in QGIS. I tried this solution, (Settings > Snapping Options and enabling the "Avoid Int." ...
1
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1answer
63 views

ArcMap ArcPy - Place signs with no lat/lng on map

I'm new to ArcPy and ArcMap but I do have programming experience. What I am trying to accomplish is to take over 22,000 signs from a database and place them on a map in reference to a street layer ...
7
votes
4answers
3k views

ArcGis Trace Tool for QGis?

Is there any tool in QGIS that traces a line like the trace tool (Editor Toolbar) in ArcGIS? I want to draw a line and trace this line back so that I get the beginning and the end of the line at the ...
1
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0answers
48 views

create table with IDs for all arcs downstream of all others

I need to summarize downstream information associated with each arc in an NHD dataset. I have a table with the downstream ID for stream segment but am not sure how to get all of the downstream IDs. ...
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0answers
648 views

arcpy & TraceGeometricNetwork return ERROR 000584

I am developing a script to automate the creation of a road network following varying criteria. I have created a geometric network and I would like to get the connection between several points with ...