Questions tagged [digitizing]

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

54 questions with no upvoted or accepted answers
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7
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835 views

How to digitize in stream mode in QGIS, using a tablet?

How to digitize in stream mode in Qgis, using a wacom cintiq tablet? freehand it's no use. i need something like MNDR stream digitizing extension for arcview 3.x, which allows continuous tracing, ...
4
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58 views

QGIS Updating three layers at a time by editing the edge where all the three layers concur

I have a map with three main layers: Roads (Polygons) Sidewalks (Polygons) Curbs (Multilinestrings) I need to adjust the edge where all the three layers concur to the cartography layer (the gray ...
3
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0answers
359 views

CadTools plugin functionality in QGIS 3 beyond Advanced Digitising Panel?

I've recently migrated to QGIS 3.6.0, and I've realised that the wonderful CadTools plugin is not compatible with QGIS 3. I tried to use the Advanced Digitising Panel, but it's cumbersome and not ...
3
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46 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 ...
3
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0answers
245 views

Split selected features with selected line from another layer not creating all new features

Trying to use the split selected features with selected line from another layer to split a polyline in 2. I run the tool and get the following output: In the attribute table there are now 2 ...
3
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0answers
668 views

Troubleshoot with “Split selected features with selected line from another layer”

I am trying to use the "Split selected features with selected line from another layer" tool from the plugin Digitizing Tools in QGIS. Sometimes, this tool works with my shapefiles but sometimes it ...
3
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0answers
65 views

Digitized points are getting displaced automatically in QGIS

We are capturing 100's of drilling sample locations in QGIS. At times, we are copying the whole set of points from adjacent survey_lines to the next one. After that, we will capture the respective ...
3
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0answers
231 views

How to avoid topology errors when digitizing a road network?

I am working on a road layer project. For the snapping option I'm using the mode to vertex and segment and tolerance 5 pixels. When zooming in (to the max) I do not notice a gap. But when I use the ...
3
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0answers
382 views

Geometry issues when digitising in QGIS

I'm digitising a large number of maps from hand drawn mud maps and digital images, and although I have used the snapping tools ("snap to vertex and segment", Tolerance 10 pixels, avoid intersections) ...
2
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0answers
28 views

Split selected feature with selected line from another layer in QGIS LTR 3.4.9

Can't seem to find that tool since I switched from QGIS 2.14 to 3.4.9 It doesn't seem to be included in the Advance Digitizing Toolbar like before.For now, I re-installed 2.14 since I need to use this ...
2
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0answers
253 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. ...
2
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0answers
32 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
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0answers
70 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 ...
2
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59 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 ...
2
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0answers
160 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
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0answers
346 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 ...
2
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0answers
225 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 ...
2
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1answer
93 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.
2
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1answer
241 views

Designing circle label with many attributes in ArcGIS for Desktop?

Without using ArcPy, how can I create a circle label show many pieces of information from an attribute table in ArcGIS? I have image about planning zone map, with specific label on top of objects, ...
2
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0answers
168 views

Topology Checking issue in Qgis 2.14.1

I am working on a large data set of Road with snapping tolerance 5px with topological editing option enable. When i am zooming to the snapped vertex with zoom level upto 1:50, its looking snapped or ...
2
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0answers
347 views

How can I optimize ArcMap Editor's streaming mode for use with a tablet such as the Wacom Intuos?

I have the Wacom Intuos 4 Large tablet which I use occasionally outside of ArcGIS. I now need to digitize a large volume of polygons from aerial imagery and am finding the tablet's ArcGIS ...
1
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29 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
30 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 ...
1
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0answers
24 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
26 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 ...
1
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1answer
32 views

Unremovable objects/lines QGIS 3.x

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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0answers
13 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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0answers
54 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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68 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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0answers
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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0answers
52 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 ...
1
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0answers
79 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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0answers
78 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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0answers
37 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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0answers
139 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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0answers
124 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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0answers
63 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 ...
1
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0answers
330 views

Shapefiles not editable anymore?

From this morning if I open a qgis project all the shapefiles are not editable anymore. I've tried different projects in both 2.14 and 2.16 qgis versions. Has anyone encountered the same problem?
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0answers
200 views

Rotate functions in “Rectangles, Ovals Digitizing” as well as “Advanced Digitizing” distort shape dimensions

I am trying to rotate squares via the rotate tool in the "Rectangles Ovals Digitizing" Plugin in QGIS. The dimensions/proportions of the sides, however, are distorted whenever I do so. Any idea of why ...
1
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0answers
32 views

Fill of sketch polygon blocks view of what I'm trying to digitize

I am trying to digitize polygons using QGIS 2.10.1-Pisa, but the red fill of the sketch polygon blocks me from seeing the imagery that I need in order to draw said polygon. I have tried going into ...
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0answers
52 views

Digitising - Separate fill and line opacities (or remove fill)

I have a client who specialises in aerial photograph interpretation and is in the process of moving from AutoCAD to QGIS. They find the auto 'fill' when digitising polygons really disruptive and ...
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0answers
754 views

How to OCR topographic maps

I have old topographic maps that I have scanned and converted into PDF in Acrobat XI 11. I need this PDF to be text-searchable (not mere image). To do this I tried text recognition in Acrobat but it ...
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0answers
83 views

Creating sub-polygons based on underlying basemap?

I'm looking at ranging patterns where animals go in and out of nature reserves into residential areas. In addition to home range polygons, I've generated polygons made from applying 25m and 50m ...
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0answers
133 views

How to set a defined distance between nodes to digitize in qgis?

Using QGIS (by now I have the 2.4 version) I would like to set some parameter (I don't know if such exists) that would impose a definite or maximal distance between nodes when digitizing a polyline or ...
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0answers
95 views

When digitizing, polygons are inverted

I need to use QGIS to digitize my images. My images are scanning electron microscope (SEM) images of rocks. I am interested in analyzing the pore space in the images. Here is the steps I follow: I ...
1
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0answers
77 views

When digitizing, objects are not saved well

I've some problems with digitizing. If I draw a line or a polygon, the line or polygon is saved in the attribute list, but not visible and its location is not saved either (when I zoom to the object ...
0
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0answers
36 views

Does the Google Earth API offer tools for capturing points from handmade points on paper maps?

My student team has been tasked with creating a software tool to help a fish biologist import the hand-drawn location markers on his paper maps to a digitized format, simply an output file with the ...
0
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0answers
127 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 ...
0
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0answers
19 views

Creating a Construction Tools Rectangle Template

I am working on a project that requires me to place hundreds of 20x20 ft squares as polygons in a feature class. Right now I am manually making them by entering height and width values. I am wondering ...
0
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1answer
26 views

Batch digitization of a fixed set of relative geometry

In support of some watershed work, I need to force flow into several valid sinks that I have burned into my DEM. Flow direction and flow accumulation really don't like sinks so trouble is that the ...