Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [digitizing]

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

0
votes
1answer
27 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 ...
1
vote
0answers
40 views

Quick way to add point features on a map

I am looking for a quicker way to add points. I am mapping the buildings on a satellite imagery, but every time I add a point, I need to press enter to close the action menu. Is there a way to add ...
5
votes
1answer
70 views

Prevent user from creating self intersected polygons

i'm working on a project in QGIS 3.4.1 Madeira. I want to prevent users from creating polygons with errors (like self intersection). When I digitize a polygon in QGIS i get a mark where the polygon ...
0
votes
0answers
17 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 "...
5
votes
1answer
139 views

Is there a “Merge Parts” tool in QGIS?

In the advanced digitizing toolbar, QGIS has these 3 tools: Split Features, Split Parts, and Merge Features. Is there a tool or equivalent algorithm for the logical fourth one: "Merge Parts"? This ...
1
vote
1answer
32 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'. ...
1
vote
1answer
28 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 ...
1
vote
1answer
32 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 ...
2
votes
1answer
112 views

QGIS 3.4 How to make 90 degrees angles when digitizing polygons ? No plugins

How do you make 90 degrees angles when digitizing polygons in QGIS 3.0 or above without any plugins ?
0
votes
1answer
57 views

Mapping out railways from paper?

I have a physical copy of a map with railways that I want to import directly into ArcGIS (the network of railways), but I have no data on coordinates of any kind (it's a really old map but the lines ...
0
votes
0answers
15 views

Draw a shape using dimensions using advanced digitizing tools [duplicate]

Does anyone know how to draw a shape by area. I need to draw a survey area of 3.58km x 3.0km. I have added the Advanced digitizing toolbar --> selected toggle edit --> created new polygon however... ...
1
vote
2answers
80 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 ...
-1
votes
1answer
62 views

Digitising Hedgerows as line or polygon?

I have been tasked with digitising hedgerows for a 5x5km area in Wales. As hedgerows are linear features, and thus do not have a wide diameter, would digitising each hedgerow as a line be ...
0
votes
1answer
109 views

Digitizing polygons by cut or split feature tool in QGIS

For saving digitizing time i created one polygon feature cover all satellite imagery (study area) and styled it outline, tried many tools inside qgis 2.18 to split / cut polygon features (i don't mean ...
0
votes
2answers
54 views

Add ring feature not available in QGIS

I have installed the version 2.18.24 in QGIS and apparently the plugin 'Digitizing tools' does not include the feture 'add ring' but it was replaced by 'fill ring with a new feature'. However, somehow ...
2
votes
0answers
77 views

Copy polygons to another layer with different attribute

I am working in QGIS 3.0.2-Girona. I am digitizing images in which there are rocks that can be encrusted, totally or partially, by algae. I want to have a polygon for the rock and one for the algae. ...
0
votes
1answer
34 views

Undo a new point while digitising? [duplicate]

How to undo a point while digitizing with QGIS 2.18? I am digitizing polygon features.
3
votes
0answers
48 views

Unable to find Arc/Curve tool in QGIS? [duplicate]

I am trying to digitize curved roads in QGIS but cannot find the right tool. I want somthing like end point arc segment in arcmap as shown in figure below.
1
vote
3answers
69 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 ...
3
votes
1answer
170 views

Digitize objects in a LiDAR point cloud?

I am working with LiDAR point cloud data of road networks. The goal is to digitize all visible objects like hydrants, streets, sidewalks. My input data is available in LAS or ASCII format. My first ...
2
votes
0answers
29 views

Error creating new polygons. QGIS

When I work in QGIS and try to fill gaps between polygons creating another one over them (project snapping settings are selected as Avoid intersection), I hope "fill" this gap with just one polygon ...
2
votes
0answers
45 views

QGIS 3D digitizing workflow

I want to digitize features in QGIS from an orthophoto and set the z-value of each node from a dsm/dtm. What is the best workflow for this? The solution might be to simply set what layer the ...
1
vote
1answer
67 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 ...
2
votes
0answers
43 views

Available snapping points for advanced digitizing?

In QGIS, the Advanced Digitizing tools have some snapping features that I don't see mentioned in the documentation. We know that we can digitize new segments that are perpendicular or parallel to ...
3
votes
1answer
151 views

Splitting rectangles into a desired number of parts in QGIS

I'm working on a project using QGIS and there is a process that I'd like to try to automate. I'm working with the "rectangles,ovals digitizing tool" plug-in to make perfect rectangles. The next step ...
2
votes
2answers
362 views

Advanced Digitizing QGIS

I would like to use the Advanced Digitizing tool and the Move tool to move entire polygons by specified distances and angles. For some reason the "d" (distance), and "a" (angle) fields are grayed out....
1
vote
0answers
49 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 ...
2
votes
1answer
83 views

Draw polylines given distance & azimuth

I am trying to draw a polyline from a single reference point. I have each specific segment of the lines Azimuth & distance. In the sequence I have areas where my line shifts over +90 / -90 of the ...
2
votes
0answers
111 views

Adding land survey info to QGIS?

I am looking for help digitizing or adding info from survey plans into QGIS. In this example I'm trying to add the lease boundaries highlighted in yellow and the pipeline right of ways to the right ...
2
votes
0answers
264 views

QGIS 3.0 vertex tool - select current layer only?

I am using the vertex / node tool in QGIS 3.0.2 to move vertices in a line layer. Part of the new behaviour is confusing / annoying and I don't know if anyone can tell me how to change the relevant ...
1
vote
0answers
40 views

Fixed length line segment in QGIS: why does helping circle not appear always?

I am working with fixed line lengths. Advanced Digitizing Panel is activated and I set the line length. Usually there is a the blue "helping" circle whose radius is the value entered in the distance ...
0
votes
0answers
14 views

using queries to return value for attribute while digitizing?

I've created a drag & drop form for digitizing point data. I'd like to fill in a value 1 in the attribute field for abundance if the condition for the field "colony" is set to "no" else should ...
2
votes
1answer
208 views

How do I control the snapping features in the Advanced Digitizing Panel in QGIS 3.0.3?

I am using the QGIS (3.0.3) Advanced Digitizing Panel. I would like to control the spaping characteristics. The QGIS documentation states that by selecting the "gear" drop down icon... You can also ...
0
votes
1answer
22 views

Adding polygon feature from one data to another

I am using ArcGIS 10.2. I have two polygon files: Data A and Data B. I am trying to add a couple polygons from Data B to Data A. In the editing mode, is there a way to pick the shape of a polygon (...
1
vote
0answers
52 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: ...
1
vote
1answer
65 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 ...
0
votes
1answer
250 views

Digitizing dimensioning and annotations

Digitizing a utility network is feasible in QGis, but I face great difficulties to digitize the huge number of annotations and dimensioning attached to the network. I try to achieve this operation in ...
2
votes
1answer
175 views

Line feature reshape tool reshapes unselected lines

I have QGIS 2.18.18 installed in my PC. I need to reshape large number of roads/tracks to match with Imagery. QGIS Reshape tool reshapes roads that are not even selected. Any suggestion? Below are ...
6
votes
1answer
315 views

Quickly temporarily disabling snapping in QGIS 3?

In some other applications I use you can use one of the "shift" keys to disable snapping for a single operation. Is there an equivalent for the new node tool?
1
vote
1answer
42 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.
2
votes
2answers
1k views

How to I change the snapping sessions for a layer in QGIS 3

In QGIS 2 I would go the the settings menu and select the snapping options but this option is not there in version 3. I have found the snapping options in digitising options but these don't seem to ...
0
votes
0answers
76 views

Fixing digitized map using QGIS?

I have some cartographic maps I need to fix the position/digitizing. If you look on the below image you will see that the point layer is not exactly at the center of the map. The exact center is ...
2
votes
0answers
159 views

How to reset the reshape tool in QGIS after 'unknown exception'?

I am using QGIS 2.18.16 and most of the time I have successfully been using the reshape tool to change the shape of polygons. I have snapping and tracing enabled. Occasionally when I right-click to ...
0
votes
0answers
63 views

Vectorizing complex and huge JPG maps in ArcGIS Desktop?

I want to vectorize a map with thousands of polygons. I have the advantage that all the polygon's boundaries are draw with the same color. My preferred software is ArcGis. The format of data is a JPG ...
3
votes
1answer
253 views

Advanced Digitizing Panel angle units

I have QGIS 2.18.3 installed. I'm trying to change angle units from degrees to Gon/gradians (90 degrees = 100 Gon). I navigated to Settings--> Options --> Map Tools --> Preferred angle units, and ...
1
vote
0answers
64 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 ...
3
votes
1answer
126 views

Digitizing Menu unavailable in QGIS 2.18.15

I installed the latest version of QGIS 2.18.15 and the Digitizing menu seems to have disappeared in the properties options of vector layers. I want to enable the 'Use Last Attribute" feature
2
votes
1answer
69 views

Drawing rings in QGIS

I plan to use for positioning and tracking of areas worked for underwater mining. I am trying to draw rings using Rectangles Ovals Digitizing plugin. But there is very little info available.
3
votes
2answers
115 views

How to digitize a “ringed” topographic-style choropleth map?

I have a choropleth map of plankton distribution in the ocean that I am digitizing. However, as you can see, there are many features within features creating rings, almost like mountains on a ...
3
votes
0answers
39 views

QGIS Value relation end and Start points while digitizing

I do a lot of pipes/pits digitization and i am trying to streamline the process. I am attempting to fill "To" and "From" field when digitizing lines with the IDs from a point layer they are ...