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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0
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2answers
41 views

Digitizing Tools error in QGIS

I receive this message: Digitizing Tools: Amend Line is disabled because layer CRS and project CRS do not match. If I set the CRS of the layer the same as the project CRS (W84 Pseudo Mercator) is ...
3
votes
3answers
76 views

In transferring a family cemetery layout to a digital format, I need a software program [closed]

We have a large historic family cemetery. I've had surveying experience, drafting in the days when it was done by hand, and a lot of real estate experience with deed descriptions and layouts on maps. ...
4
votes
2answers
73 views

How to automate 'downstream' and 'upstream' manhole ID field in a pipe line feature

I have been digitizing a drainage network and now have been supplied attribute fields to add to the features I have digitized. Two of the fields for the pipe features are 'upstream manhole ID' and ...
1
vote
1answer
15 views

Resources for digitizing in webmap and export? [closed]

Its possible with Google Map API to draw geometries and points. And exporting as well I assume. Is there other alternatives, probably based on Java that can do the same job? I've been researching on ...
-4
votes
2answers
53 views

Is it possible to find the minimum map-able unit (MMU) after creating a map?

I'm not very good with the GIS lingo so I apologise if this doesn't make too much sense! Lets say I have just finished digitising the land cover of an aerial photograph and it's looking like the ...
3
votes
2answers
82 views

Changing QGIS cursor size and color?

I'm digitizing some old topographic maps (scanned images), and these maps are in grayscale. When in editing mode, to draw the contour lines, I would like to be able to change the color and size of ...
1
vote
1answer
127 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?
4
votes
1answer
113 views

How to split a polygon into multiples sections in QGIS?

I am working on QGIS latest version 2.12.3. I am digitizing a polygon. It represents a riparian buffer of a river. The polygon made a continuous « loop » with a widht of 50 meters. I want to split my ...
2
votes
2answers
72 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 ...
2
votes
1answer
50 views

Can't Find the Split selected features with selected line from another layer tool

I'm trying to split a selected polygon features with a selected line from another feature layer. I, however, can't seem to get the tool for this to show up in my advanced digitize toolbar. In ...
4
votes
2answers
197 views

How to create in QGIS shapefile a field that automatically returns the current date

I'm digitizing a shapefile in QGIS and I need to create a field that returns automatically the current date.
1
vote
0answers
54 views

salt marsh recession mapping with landsat/WV, IKONOS) [closed]

I am trying to detect timing and pattern of change in a particular salt marsh (low marsh sitting close to a high marsh). Basically, I'm interested in detecting changes in the leading edge for ...
3
votes
0answers
43 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 ...
2
votes
1answer
26 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
votes
1answer
178 views

Newly added points disappearing after saving edits in QGIS.

I am adding features to a shapefile point layer in QGIS 2.12 Lyon. When I add the new point I can see it, but once I click the Save Edits button it disappears. When I click Toggle Editing button to ...
3
votes
1answer
48 views

Change direction of polylines from DEM data

I am trying to define the direction of my polylines (which represent gutters in a drainage system). Does anyone know if it is possible to define the direction based on elevation data extracted from a ...
0
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0answers
65 views

Digitizing scale when digitizing from Bing imagery service in QGIS

I need to digitize a bunch of islands from imagery in QGIS. It is the Bing Maps aerial imagery layer. I will obtain all required permissions. My plan is to lock the map scale at 1:25,000 and use heads ...
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votes
1answer
66 views

How are digital maps generated? [closed]

This is a more of a noob GIS question. How are all the features on the maps we come use know and love (Google Maps, Bing Maps) generated from imagery? Does somebody actually look at the imagery and ...
1
vote
1answer
72 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 ...
0
votes
0answers
51 views

Is it possible to trace basemap features?

I'm looking for an easier way to digitize. Does anyone know if it's possible to trace basemap features (OSM/stamen/etc) in QGIS (2.12)? For example, as opposed to creating various vertexes along a ...
1
vote
1answer
92 views

Digitized Map To Scale

Is it perfectly acceptable to produce a map at a scale of 1:24,000 from a database that was digitized from a 1:100,000 scale source map?
4
votes
0answers
185 views

“Error” on Advanced Digitizing Window in QGIS

I have the word "Error" that has appeared on my Advanced Digitizing Panel since upgrading to QGIS 2.12.0 Lyon. It doesn't appear to actually affect anything negatively... has anyone else seen this or ...
2
votes
0answers
84 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 ...
0
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0answers
30 views

Digitised problems - Combine isolines

I try to digitize a large number of topographic maps. Digitizes the contour every four meters. I use the program ArcGIS 10.3 and ArcSCAN. The problem is that it has many objects in the map outside of ...
0
votes
1answer
42 views

Niche MapInfo Question : Digitising options

I've recently started using mapinfo to digitise on a daily basis, I am usually georefencing old deeds (on top of OS Mastermap) and then digitising them. The problem is when drawing the polygon the ...
1
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2answers
109 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 ...
1
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0answers
34 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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2answers
52 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? ...
2
votes
0answers
64 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) ...
1
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0answers
26 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 ...
1
vote
1answer
63 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, ...
1
vote
1answer
76 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 ...
0
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0answers
37 views

Capturing line version 2.10

I'm a beginner (as in complete noob) user with version 2.10. I'm trying to digitise some rivers from a raster layer but can't find the "Capture Line" tool which the tutorials and resources show as ...
2
votes
2answers
175 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 ...
2
votes
0answers
39 views

QGIS 2.8.1 (Windows 64bit). Setting snapping to the “decoration” grid?

I was wondering if anyone knew of a way to snap digitizing to the grid you can create in View>Decorations>Grid? I can't see anything in the manual or the menus so I am thinking there probably isn't ...
2
votes
2answers
358 views

Create circle shapefile vector in QGIS

Is it possible to create a circle shapefile feature in QGIS, like it is possible to do in ArcMap? I am trying to digitise a map wich features roundabouts, which I'd like to be part of the same ...
2
votes
1answer
97 views

What program can I use to highlight and calculate multiple areas on a satellite image?

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 ...
1
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0answers
36 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 ...
1
vote
2answers
119 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. ...
0
votes
1answer
198 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 ...
1
vote
1answer
141 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 ...
1
vote
1answer
27 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 ...
0
votes
2answers
56 views

Touched lines but not connected in ArcGIS 10.x

Ι convert a contour file DWG to SHP file. The lines are touched but disconnected and they are broken in many places. Is there an automated way with a particular tolerance to automatically connect the ...
2
votes
2answers
148 views

Conditional Value Map widget in QGIS

I am looking for a way to implement conditional value mapping in QGIS. This means that the values available in attribute number 2 depend on the value provided in attribute 1. Example: If the user ...
1
vote
2answers
99 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 ...
1
vote
0answers
203 views

How to OCR topographic maps

I have old topographic maps that i have scanned and converted into pdf in Actobat XI 11. I need this pdf to be text-searchable (not mere image). To do this i tried text recognition in acrobat but it ...
0
votes
1answer
56 views

Same Image and Shapefile are not overlapping in ArcGIS for Desktop?

An image is Digitized in ArcView 3.3 with JPEG extension; But not with Image analysis extension. When I open that image and shapefile in ArcGIS 10.1 for Desktop then they are not overlaping each ...
5
votes
2answers
903 views

How to digitize building footprints with orthogonal edges?

Using QGIS, I am trying to digitize an old raster map, and because I ultimately want to load these 2d layers into sketch-up to turn into 3D models, I need everything to be square. Here's a sample of ...
2
votes
1answer
383 views

How to implement Add feature action from PyQGIS

I'm trying to implement / reuse Add Feature functionality in my python plugin. there a class/function that handles geometry creation on canvas based on layer geometry definition? I'm checking API but ...
2
votes
2answers
286 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 ...