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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2answers
617 views

Drawing a polygon of a given area

First, I am using QGIS 2.8.2. I have GPS waypoints and satellite imagery and am trying to draw polygons. This is easy enough, but I need to make sure each polygon is 1ha exactly. Is there a way to ...
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2answers
1k views

Suitable Raster processing methods to extract field boundaries from images

I'm trying to extract field boundaries and features from a lot of aerial images of agricultural land - and avoid digitizing these features manually. I've managed to get a crude raster file of the ...
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2answers
693 views

How to automatically convert dots on paper maps to vector points?

I have several paper maps with dots that I need to convert to vector points. I was hoping to get some suggestions on how to accomplish this without recreating each and every point by hand. I know ...
2
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1answer
179 views

unable to draw polygon without attribute window popping up? [duplicate]

I'm fairly new to QGIS and an trying to draw a polygon via "Adding Feature". When I make the first left click to start, the attribute window pops up instead of letting me continue on with additional ...
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2answers
3k views

How to go with…somewhat complex geological maps in QGIS?

Just a follow-up to this question QGIS: Line to polygon conversion. Not sure do i have to continue there itself... We are currently digitizing a geological map...which has 36 features in total. Some ...
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1answer
504 views

Line to polygon conversion

Currently we are working in a geological project..in which all the Contacts, Linear & some other geological features have to be captured. The thing is most of the features have to be Captured as ...
2
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2answers
438 views

Digitized Shapefile manually using wrong projection: how to fix it?

I have a raster in correct projection. I used shapefiles, and marked objects (manually), but I found out that my vector layers have different projection, so they have different size and position. Is ...
2
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1answer
47 views

QGIS transparent polygon returned after digitizing

After the digitalization of my raster map as per below: I saved it in .geojson format and .kml format. The geoJSON works fine: but once I export as a kml and open (in Google MyMaps), then I have ...
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1answer
417 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
287 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
44 views

Editor Tool, Areas instead of Segments in ArcMap?

I'm studying this tutorial: https://learn.arcgis.com/en/projects/get-started-with-arcmap/lessons/predict-the-impact-of-the-proposed-road.htm But I can't complete the "Digitize the proposed road" ...
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2answers
379 views

ArcGIS lines to polygons without holes

I have a dataset with contours. Depression contours are separate of the normal contours and need to be digitized counter-clockwise. Still, there are usually some faulty ones with wrong direction and ...
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1answer
411 views

Heads up digitizing - Polygons overlay differently with two different Satellite images

I have been digitizing building footprints from satellite image using ArcGIS 10.1 . Field data collections is done with the use of four corner point GPS way point. Due to multipath errors, we are ...
2
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1answer
6k views

When I finish drawing a polygon, it disappears again (although appearing in my attribute table)

I'm working with Quantum GIS at this moment. And as the title says, when I finish drawing a polygon, it disappears again. The new object does appear in my attribute table and in the legend/'filling of ...
2
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1answer
423 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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1answer
77 views

Automatic selection of colored regions when digitzing choropleth maps

I am new to working with GIS. I have a raster choropleth map similar to the one displayed below. I want to create a shapefile from the map, where each layer contains all the countries that have the ...
2
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3answers
600 views

Freehand editing without holding down mouse button in QGIS?

I am trying to delineate wetlands using satellite imagery in QGIS 2.10.1-Pisa. I'm using the Freehand Editing plugin. Is there a way to draw polygons without having to hold down the mouse button, ...
2
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1answer
787 views

using the “freehand” construction tool

I am drawing hydro features with the freehand tool. Does anyone know how to delete vertices (i.e. back up) in ArcMap 10 while drawing with freehand in the construction tools? I was just curious if ...
2
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2answers
251 views

Closing polygon with right click on Mac OS using QGIS?

I frequently use QGIS to digitize satellite imagery or georeferenced maps. Recently, however, the Add Polygon Features and Add Line Features have stopped working - I can Add a Polygon Feature and ...
2
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1answer
158 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
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1answer
336 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 ...
2
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1answer
95 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 ...
2
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1answer
3k views

Advanced Digitizing Error CAD tools are not enabled for the current map layer

Using QGIS 2.8.4. I want to use the Simplify function so turn on the Advanced Digitizing menu. The panel displays an error "CAD tools are not enabled for the current map layer" and the error message ...
2
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1answer
470 views

polygon/polyline digitizing techniques for geological data

My current work involves extensive digitising of historic geology data - essentially the creation of new polygons and polylines based on overlain raster and vector layers. This is all done manually ...
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0answers
35 views

Advanced Editing Options in ArcGIS Pro

In QGIS there are "Advanced Editing Tools", which are able to measure distances and angles of the feature being digitized as you are drawing it. Does ArcGIS Pro also have this capability? I have a ...
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0answers
65 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 ...
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0answers
362 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. ...
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0answers
34 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 ...
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0answers
88 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 ...
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0answers
76 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 ...
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0answers
231 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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0answers
384 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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1answer
76 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 ...
2
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0answers
243 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
104 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
252 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, ...
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0answers
173 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
73 views

Making perfect rectangle in QGIS [duplicate]

I want to be able to set the height and width of my rectangles, as well as the angles. I have been trying the Rectangles Ovals Digitizing plugin, but I can't seem to make it do anything (besides turn ...
2
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1answer
1k views

Why are my polygons automatically simplified/generalised when merging them in ArcMap 10.2?

I am creating a small land use map, as an exercise for visual image interpretation. I created a shapefile and started digitising polyogons with the polygon tool. The problem is that some of my ...
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0answers
367 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 ...
2
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0answers
264 views

Polygons of Land Use Change? [closed]

I am doing a project where I am digitizing a map of Haiti from the 70s. Through R2V I digitized the lines and then I exported it into ArcGIS 10. I am just interested in the land use change, therefore, ...
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1answer
614 views

Steps to digitize OpenStreetMap in QGIS?

I am new to QGIS. Can someone help me with the steps to digitize OpenStreetMap? Or should I save the particular area I want to digitize into .tiff files and then try to digitize the .tiff file?
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2answers
142 views

Aligning an edge to match another edge

I'm new to QGIS and I wonder whether there is a tool that helps to adjust the edges between two or more polygons; similar to that topology tool that's used in ArcGIS. http://desktop.arcgis.com/en/...
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2answers
210 views

Making digitization more detailed afterwards with QGIS?

I digitized already two areas, bordering each other on one side. Then I realized that more detail was needed! What do you suggest as a fast way to do so? Adding each time new dots/vertices takes so ...
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6answers
853 views

In what real-world examples do users still digitize features from a map?

Is digitizing of map features completely dead? For example, when and why do you still digitize features from a map? It can be heads digitizing up from a scanned paper map (or image, or whatever) or ...
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2answers
60 views

Which value should I assign my digitalized features?

I have a scanned an old document that contains geochemical interpolated values (no way to work with the digital file). This is the original image: And this is the digitalization I made from it: Now, ...
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2answers
736 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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1answer
887 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
179 views

Mapbox Satellite - Digitizing

As a part of project scope we have to deliver to the Client digitized data sets – some houses and roads. Can we use Mapbox Satellite global imagery layer [1] under Professional plan [2] for feature ...
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2answers
4k views

Converting *.jpg scanned from line paper map to vector data in ArcGIS for Desktop?

I want to digitize automatically old paper map that scanned to jpg . I know that it's possible to digitize it with arc-map but I can not remember how to do it.