Questions tagged [trace]
in this context applies to digitizing tools for tracing lines
71
questions
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24
views
How to snap and trace contour lines from 'opentopomap' xyz layer?
I've created a project and i'm using the xyz 'opentopomap' as my base.
I would like create my own layers by tracing over the contour lines provided by opentopomap.
I have downloaded the raster tracer ...
0
votes
0
answers
38
views
Traced polygon on QGIS plots miles away from origin
I am trying to trace a number of polygons in QGIS but having difficulties. Once I select the second vertices it creates a point hundreds of miles away!
I have tried to create a new project and also ...
0
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0
answers
36
views
Setting M Values to nearest foot
I am using 10.8.2, is there a way that after I draw a line the M Values can be auto-rounded to the nearest foot, without me going to "edit sketch" and changing them myself? All I am doing is ...
0
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0
answers
60
views
Get errors featureclasses of Trace Network ArcGIS Pro
I try to analyse road featureclass for errors of topology and I use Trace network tool in arcpy.
I cannot just create topology and add some rules, because it doesn't work like I want.
When I use the ...
0
votes
1
answer
103
views
Accessing filter value list names inside ArcGIS Pro script tool using script [closed]
I am using ArcGIS Pro.
I want to access the the name parameter defined under the condition barrier parameter using the Python script to add some custom values.
How can I access the value list table ...
0
votes
0
answers
48
views
Unable to get ArcGIS Pro utility network, Trace Tool output in PyCharm
I am trying to run Trace Tool in PyCharm using ArcPy and get the traced features in PyCharm but after running the Trace tool in PyCharm I am not getting the traced features details.
I am running this ...
0
votes
1
answer
58
views
Polygon Trace in Layout
I am trying to add a graphic polygon to a 3D map layout. Now, I would like to trace the polygon along a layer, how can I do this?
When I hover the cursor along the border of the layer, I don't see any ...
2
votes
1
answer
224
views
automatic extraction of contour lines from a scanned paper map
I'm currently trying to detect contour lines from a georeferenced raster image, which looks like this:
With the help of FME I could extract the lines very good. But they are divided at every section. ...
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0
answers
134
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QGIS 3.22.8-Bialowieza Digitising using Auto Trace but line not following vertices correctly
I am trying to draw a polygon between existing polygons but it does not follow the vertices correctly even though I tried the snapping and enable tracing options. A screen shot is shown with the ...
4
votes
1
answer
190
views
Gaps and Islands problem in PostGIS for GPS traces
I'm using ST_MakeLine to create traces of ship movements. The query below yields all the GPS points on a certain day, and I'm using ST_Within to only find ships in the navigable portions of the river.
...
1
vote
1
answer
170
views
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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2
answers
107
views
Auto Trace Installation Error in QGIS 3.8
My QGIS 3.8 doesn't support Auto Trace 1.0.6 or 1.0.7. My pc has a 64bit Windows 10. How can I solve it?
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0
answers
64
views
QGIS Calculate Attribute Value from sum of dependent Point features
I have two layers one with line geometry and other with point geometry. Features from both the layers are perfectly snapped.
In the line layer, I want to calculate the field which is depend on ...
0
votes
3
answers
256
views
Tracing Upstream Accumulation from a polygon start
I am new to ESRI products (I typically use QGIS), but am using it in order to analyze upstream/downstream flowlines with the National Hydrography Dataset (specifically, HUC-4 mapping units for NHDPLUS ...
1
vote
1
answer
352
views
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 ...
1
vote
2
answers
799
views
Filling in areas between lines with polygons in QGIS
I have to make a geographical map.
I have to fill in the gaps between the lines with polygons. Is there a possibility to just trace those lines automatically?
I have to do everything manually now, ...
0
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0
answers
234
views
Tracing path of lines in network using QGIS
I am using QGIS 3.
I want to trace the path of lines in network. I found that I can use Snapping Toolbar to trace the lines but in manual and I want to do it in automatic, I give start node and it ...
0
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0
answers
236
views
QGIS reshape tool and enable tracing (snap) tool
I know how to increase or change the size of a polygon with the reshape tool, but can you also use Enable Tracing tool with it, as you can with drawing a new feature?
1
vote
3
answers
1k
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Creating polygons that share the boundaries of existing polygons
I'm creating polygon (that about actual vegetation).
First, I create one polygon
After that, I will create more polygons that share the boundaries of existing polygon.
But, it show result like below ...
1
vote
0
answers
180
views
How to enable tracing in QGIS 3 beyond applications for adding polygon purposes?
I have used the enable tracing feature in QGIS 3 to create new polygons (Add polygon feature), and it works very well. However, i have not been able to use it for other purposes beyond that, for ...
1
vote
2
answers
3k
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 ...
2
votes
1
answer
301
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 ...
2
votes
1
answer
68
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 ...
0
votes
1
answer
306
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 ...
16
votes
1
answer
12k
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. ...
0
votes
2
answers
238
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 ...
3
votes
2
answers
4k
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 ...
1
vote
0
answers
491
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
votes
0
answers
624
views
Troubleshooting pythonw.exe has stopped working with Trace Geometric Network? [closed]
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 ...
3
votes
1
answer
750
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 ...
0
votes
2
answers
4k
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
votes
1
answer
221
views
Using QgsMapCanvasTracer/QgsTracer in custom tool [closed]
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 ...
2
votes
1
answer
286
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 ...
1
vote
1
answer
625
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 ...
2
votes
1
answer
436
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 ...
1
vote
0
answers
179
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 ...
3
votes
1
answer
156
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 ...
1
vote
2
answers
218
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
1
answer
1k
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
1
answer
149
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 ...
1
vote
1
answer
570
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 ...
2
votes
2
answers
143
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 ...
1
vote
2
answers
2k
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
0
answers
1k
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
1
answer
825
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) ...
1
vote
3
answers
863
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 ...
3
votes
1
answer
762
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
1
answer
3k
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
2
answers
945
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 ...
1
vote
2
answers
965
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?