Questions tagged [digitizing]

The process of converting features on a map or image (either hardcopy or digital) to vector-based data in digital format.

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96 views

Creating/digitizing roads using ArcMap editor?

This is probably very basic but I am not able to figure out. I am trying to digitize roads by drawing lines. I go to Editor>Star Editing, select the layer, select my layer under 'create features'. ...
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1answer
48 views

Find Close Vertices in QGIS

I am trying to find digitizing errors in a line-layer. Obviously the snapping was not activated when the person who digitized created the lines. As far as I know QGIS cannot find undershoots, so I ...
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2answers
221 views

Possible to set default attribute fields for vector creation?

I'm using the latest release of QGIS (2.14). Is it possible to set default attribute field parameters to be used automatically during the creation of new shapefiles/vector files? I'd be specifically ...
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2answers
79 views

USGS National Map Ortho - Digitizing

As a part of project scope we have to deliver to the Client digitized data sets – some houses and roads. Can we use USGS Orthoimagery from The National Map layer for feature digitizing? http://www....
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2answers
3k views

How to close a polyline in QGIS while digitizing?

We need to work on a line layer where some features are closed and some are open. The closed features need to be closed perfectly, so that the first and the last point of the polyline perfectly match. ...
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1answer
105 views

Split polygon with selected line from another layer in QGIS

I am trying to split a selected polygon ("regions") with a selected line from another layer ("streets") in QGIS 3.8.3. In the example below, I want to split the selected polygon coloured in yellow ...
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1answer
176 views

enable Advanced Digitizing Panel (cadDockwidget) with PyQgis

I am working on a PyQgis Plugin where I want to enable cad in advanced digitizing panel. Following pre-conditions are met: layer is in edit mode project has projected crs move feature tool is ...
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2answers
145 views

Android App to help digitizing point layers on a Tablet

In QGIS, using a pen on my touchscreen PC I can I can digitize a lot of points (e.g. 14000 pts in 2 hours) faster than with a mouse: without having the attribute form to show up I simply need to touch ...
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1answer
46 views

Unsnapping two items that have accidentally been snapped in QGIS 3?

In QGIS 3 how can I "unsnap" two items that have accidentally been snapped? So far the only way I have found of unsnapping is to delete the vertex and re-add it.
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1answer
118 views

How to digitize a plot in QGIS

I need to digitize a plot (not a map) that consists of several polygons. I tried some open source options to digitize a plot (for example here is a list of suggestions), but I didn't find yet a free ...
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1answer
901 views

OpenLayers 3: Digitizing holes (donut polygons)

I am working on an OpenLayers 3 digitizing tool, which works very fine at this point. I would like to add a functionality that lets me add holes to existing polygons. I know this is doable in ...
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3answers
1k views

Changing map scale in ArcMap after almost finished digitizing [closed]

I'm just about to design a map that represents different areas in my immediate living environment. I Unfortunately made a big mistake at the beginning of my project. The current scale is given by ...
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3answers
499 views

How can I create a simple basemap in QGIS that will allow me to trace a polygon with an accurate projection?

I need to find an aerial photograph, create a new vector layer, trace several fields in this aerial photograph, and find random coordinates within these polygons. I first tried this with the Google ...
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3answers
3k views

Auto populating XY fields when new point feature digitized using ArcGIS Desktop?

Is there a way for ArcGIS Desktop to populate a field automatically when a new point is dropped on the map? We have our map in State Plane Feet, and we want to the database to automatically add WGS ...
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1answer
19 views

Adding points along line by clicking on it using ArcGIS Desktop?

ArcGIS for Desktop 10.6.1. I have a polyline (old railroad track). I'd like to add the train stops as points along it by clicking on the places. I have georeferenced historical maps as the ...
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1answer
47 views

Split feature from polygon that's entirely within all other features' boundaries in QGIS

I'm splitting a polygon into various features for small-scale land cover delineation. One area I need to delineate into its own feature shares no boundaries with other features, it is an irregular ...
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1answer
86 views

QGIS 3.4.x Properly digitizing polygons of uneven sides

I am facing some problems when digitizng polygons of uneven (irregular) sides using advanced digitizing and none/planimetric measurements for area and length calculations. In the example image below ...
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3answers
78 views

Digitizing lots of points and polygons outside GIS software?

I have orthophoto of marine bottom from which I want to extract several informations. This information can be for example position of animals (i.e. a point) or the position/contour of a rock (i.e. a ...
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1answer
120 views

Quick add vertices when creating feature (QGIS 3.2)

I am creating a new feature (polygon) in QGIS 3.2.2 and would like to easily add the vertices as I delineate a boundary. Currently, I can do this one by one as the cursor snaps to the vertex of the ...
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1answer
76 views

Free rotating SVG point symbols

I have to rotate a great number of point SVG symbols (valves, caps, Te, etc.) in order to fit them with the gas distribution network. SVG rotating could be achieved by creating a field with angle ...
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1answer
194 views

Connecting vertices to form a line without using an attribute

I have a number of multipoint features that form lines (hiking trails). I would like to connect the dots of each multipoint feature to generate line features, but there are no attributes with which to ...
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2answers
384 views

Edit Geometry with digitizing tools in QGIS of a postgis layer

I have a multiline PostGIS layer added to my QGIS 2.10.1 Pisa. I'm able to add features using the digitizing tools, but I'm not able to use the delete or node tool. It remains gray even if I'm in ...
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1answer
127 views

Seeking program to highlight and calculate multiple areas on satellite image? [closed]

I would like to calculate the area of all the parking spaces in my city (North Miami Beach). I would highlight the parking in two layers, commercial and residential, and then export it to Excel and ...
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1answer
793 views

How to suppress advanced digitizing tool window

I'm using QGis for years but suddenly I stuck with something that I'm sure it's an easy fix. Every time I start to create a new feature, the Advanced Digitizing tool window pops up. Do you know how to ...
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1answer
259 views

Advanced Digitizing Tools Crashing in QGIS 2.8.1 x64 on Ubuntu 14.04

I'm hoping someone here can tell me what I'm doing wrong... Whenever I use the Advanced Digitizing tools in QGIS, I crash after about 5 clicks. I'm even doing it without OTF transformations on. Any ...
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1answer
38 views

Digitizing 2-node lines?

I tried digitizing in to a new sqlite line layer with autoincrement id ticked..... I want to create a 2-node line, but there seems to be a minimum limit of 3 nodes. Is this correct or am I doing ...
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2answers
196 views

QGIS: digitized object disappear when filling in attributes

When digitizing, for example a point, the attribute window opens for you to fill in the pre-defined columns/information. But no point is shown in the map while you do this in QGIS 2.6. It was shown in ...
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1answer
808 views

How to change the QGIS edit cursor and node icons?

Two things I really dislike at QGIS, are the "fat" node icons (when editing lines) and the cursor which cover the object below and make it impossible to accurately move a node. Is it possible to ...
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1answer
121 views

Digitizing custom road for ArcGIS Network Analyst?

I've built my network and now I am creating custom bus routes. However, one of my bus routes makes a stop on a private road that I had not realized was included in my network. How should I go about ...
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1answer
4k views

How to indicate flow of a watershed feature?

While tracing and digitizing rivers, streams, rivulets, etc., is it possible to indicate the direction/flow in the shapefile on QGIS? I'd like to avoid using map labels. Ideally, when done tracing, I ...
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1answer
140 views

Digitized vectors don't match while zooming [duplicate]

I'm trying to digitize in QGIS with Google Maps as the background. Digitizing with constant zoom works fine. But if the zoom is changed, the digitized vectors don't match the Google Maps background ...
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0answers
26 views

Automatically filling area surrounded by other polygons?

I want to fill the gap with a polygon automatically. It is surrounded by other polygons but the part inside the yellow circle is another shapefile. The gap is not made by adding a ring. Or is my only ...
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145 views

Freehand editing in QGIS

Is there a way to cut polygons in QGIS using freehand tool? Unfortunately Freehand Editing tool in QGIS 2.x does not provide such functionality. There is a tool for cutting polygons with standard ...
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0answers
57 views

How to delete vertex and keep topology

I work with line vector data (road network).The lines (roads) includes several vertexes. I would like to have for each line only nodes - at the end of line, or at the intersection of n lines. How can ...
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0answers
33 views

QGIS Advanced digitizing switch from Cartesian to Ellipse

I´m trying to draw a line per length, but I need to enter the length in the Ellipse value. Is there a way to switch the values in the length window in the advanced digitizing panel from Catesian to ...
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0answers
55 views

QGIS 3.4.10 for Mac users…Digitzing polygons

I have just installed the LTR version of QGIS (3.4.10) and am having trouble telling QGIS when I have finished a polygon. In fact, I can't. It used to be in earlier versions that to end a polygon you ...
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1answer
54 views

Unremovable objects/lines QGIS 3.x [duplicate]

How can I remove "red lines" that become permanent to my map canvas while trying to digitize different shapes. The program just leaves the outline of what I'm trying to draw. It still remains even if ...
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1answer
51 views

Digitize image / fantasy map without projection

I have an image where I know the distance between two points in meters (say 800). How do I import this image in QGIS (3.8) so that I get this distance when I measure with the tool in the toolbar? ...
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0answers
15 views

Adding vertices at a centerline node not working in QGIS3

I've recently installed QGIS 3.4. Earlier today, my vertex tool showed a virtual node at the center of line segments (as it should with the new node tool). This is no longer showing while editing the ...
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245 views

Using a Wacom Tablet and pen for QGIS, can I pause my free-hand polygon before I am finished, and then continue?

Is there a way to pause the free-hand tool in QGIS so that I can lift the pen off of the screen, and then continue my polygon again when I am ready? I have learned how to pan while free-hand drawing ...
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0answers
87 views

When using a Wacom Cintiq tablet and pen, can you pan while creating a feature using the freehand polygon plug-in in QGIS?

Is there a way to pause the free-hand tool in QGIS so that i can pan and move over the image and then continue my polygon?
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105 views

Measurement units - advanced digitizing toolbar - QGIS

I want to create a polygon with certain dimensions in QGIS. 180x180 feet. I am trying to use advanced digitizing toolbar in order to create it. But I do not know the measurement units of d (distance) ...
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67 views

JOSM-like editing for QGIS

I am used to digitizing stuff using JOSM, the Java OpenStreetMap editor. Recently, I tried some digitizing in QGIS and it felt rather clumsy. What I was missing specifically was an equivalent to the "...
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50 views

Why does adding polygon in QGIS sometimes create a feature with edge too far across the screen? What am I doing wrong?

While digiting/creating new polygons in QGIS some polygons have elongated edges. Some features have no geometry (area=zero) too. What could be the reason? I use 3 Monitors, one for QGIS, one for ...
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117 views

Hotkeys for DAT/EM Summit Evolution linking into ArcMap functions instead

I'm using DAT/EM Summit Evolution to do feature mapping in stereo. When I try to use the hotkeys set in Summit, they instead execute functions in ArcMap. ie. when I press "0" which is linked to CAD: ...
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88 views

How to create a line through contours?

I am using QGIS 2.18.14. I want to create line through contour lines with fixed segments, automatically. I already tried manually with 'Advanced Digitizing Tools'. It works fine but too slow. The ...
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38 views

Custom Tool for creating a cirle out of straight segments

I used to use an old tool coded by somebody that would create a circle much like the current ESRI Circle tool, but it would make the circle out of straight segments with many vertices. The dll can ...
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164 views

QGIS 2.14.11 Problem Deleting Features

I have recently upgraded to 2.14.11 from 2.8.2. I opened an old project which hasn't been opened since before I upgraded and came across an issue. I started editing a vector layer which was already ...
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141 views

Digitizing overlapping hatched range maps

So I have a book of range maps for species within a taxon. As they are presented, many of them are hatched (or stippled, etc.) and overlap ("cross-hatching" shows two species coexisting in the same ...
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87 views

QGIS - digitising polyline on Google maps base

I'm displaying a Google Street map via the Openlayers plugin and hand-digitising a route to find out its length. As I pan the map the digitized line keeps shifting slightly on the basemap. I'm using ...