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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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 ...
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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 ...
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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 ...
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1answer
358 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 ...
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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 (...
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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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1answer
68 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
601 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 ...
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1answer
273 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 ...
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1answer
443 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?
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1answer
44 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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2answers
2k 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 ...
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97 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 ...
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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 ...
3
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1answer
373 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 ...
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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 ...
3
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1answer
167 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
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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.
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2answers
154 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 ...
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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 ...
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2answers
219 views

A accurate tool for digitization in qgis

I have some raster maps that need to be digitized. Me problem is that some of the shapes are very hard to be digitized. Take for example the circles that need to be digitized in this map Now matter ...
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2answers
2k views

QGIS 2.18.2 - Digitizing Error geometry type is not compatible with the current layer

I have an issue with digitizing lines in QGIS 2.18.2. I was using cadtools and after digitizing lines in my Lines layer on saving i get the message: --Could not commit changes to layer (insert layer ...
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1answer
313 views

Connect newly drawn lines to existing lines in QGIS?

I need a simple tip for drawing line shapes in QGIS. I have multiple line shapes in my project that needs to be connected, so is there an option to join my already drawn line with the line that I'm ...
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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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2answers
1k views

Snapping multiple nodes of a polygon to the nodes of a line?

I am working with vector polygons that have derived from hand drawn areas from when mapping was carried out with tracing paper over paper maps. Therefore many of the polygons don't exactly line up to ...
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1answer
112 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
849 views

Create rectangle by entering width & height numerically in QGIS?

I need a quick way to create rectangles with set with & height in meters. Is there a straightforward way to do this? I am well aware that there are a number of ways to achieve this, but all that I ...
4
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1answer
253 views

Does the precision of digitized points vary depending on scale in QGIS?

I have been editing the locations of some points in QGIS. The scale that I am using varies between 1:6000 and 1:12000 depending on the area that I am looking at. I have been seeing some irregularities ...
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1answer
406 views

Use line style to adjust rubberband in QGIS?

I am digitizing lines and have to keep certain distances to other lines while digitizing. Normally I would just use a buffer to generate these prohibited areas and snap to these polygons while ...
6
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1answer
181 views

Drawing points around polygon in QGIS?

I'm drawing many blocks like these Then I need to surround them by points at fixed distances from each other like so But I have a lot of blocks, and many points to calculate the distance, and then ...
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2answers
560 views

Filling gaps / holes in a shapefile?

I have a shapefile that looks like this: I want to delete the holes, but I can't use any of the editing tools apparently... What can I do?
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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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1answer
45 views

Accuracy assesment of an automatic line digitizer!

I have a polyline map which I extracted automatically and I want to compare it with another polyline map which I extracted manually in order to evaluate the accuracy of the automatic method. (my study ...
2
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1answer
86 views

Digitizing with Cut Polygon Tool

I am working a project that consists of manually digitizing geology layers from a scanned map. At the moment my process consists of me digitizing the small polygons and then the larger areas around ...
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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 ...
2
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1answer
207 views

Georeferencing CAD drawing against point data and/or raster image?

I am working on a project to identify households within certain buffer areas of a proposed water pipeline. I have raster imagery of the area of interest, point data for the households, and a CAD ...
2
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1answer
364 views

Visualizing roads with curved arrows in QGIS?

I need to show a double arrow at the beginning and end of a road feature. When I use arrow in QGIS 2.18 every intersect has separate arrow like this:
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2answers
235 views

Georeferencing map with known Central Lat-long and distances?

I have the scanned copy of an Old Map which was created using a Plane Table survey, and based on my reading of literature around it, is supposed to be quite Accurate. The central Lat-long is known, ...
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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 ...
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0answers
244 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 ...
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1answer
825 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 ...
4
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1answer
3k views

OpenLayers 3: Change drawing style, but keep style of previously drawn features

I created a vector and a drawing interaction: // Create feature collection and vector var featureCollection = new ol.Collection(); var vectorSource = new ol.source.Vector({ features: ...
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0answers
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 ...
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1answer
430 views

OpenLayers 3: keep sketch after measuring

I followed the official OpenLayers 3 Measure example to implement measuring in an application. It works fine, but when I finish my sketch by double-clicking it dissappears. In the following ...
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1answer
161 views

Digitizing Airport approach-zone with z information in QGIS? [duplicate]

I'm trying to create a vector layer in QGIS out of this Z-dimensioned approach-zone for an ongoing multi-criteria analysis: * The oval shaped base should be 59,56 meters high (Z) For every "ring" z-...
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1answer
61 views

Creating Feature Shape Templates in ArcMap?

Working in oil & gas, I find myself drawing the same polyline shapes over and over again in my company's pipeline database. For example, a 12" valve set might always have the same dimensions, a ...
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0answers
12 views

Importing OpenStreetMap data in ArcGIS for Desktop? [duplicate]

It is possible to import data in QGIS but ArcGIS has more features and easy to use, so is there any way to import OSM data and we can use ArcGIS tools for analysis and database creation?
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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, ...
4
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2answers
255 views

Is it possible to have presets for digitizing in QGIS?

I want to digitize many identical features (same attributes). They will have different location. Type: points and lines. Is it possible to have presets? Like to select: "traffic calming" and then all ...
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 ...