46
votes
Using QGIS vertex editor?
In QGIS 3.0, the vertex tool (same as node tool from QGIS 2.x) works a bit differently. Whether this is an improvement or not is a matter of opinion. It certainly takes a bit of getting used to.
...
- 23k
30
votes
Accepted
How to randomly subset X% of selected points?
Here's a python function that will select random features in a layer based on percent, ignoring current selection:
def SelectRandomByPercent (layer, percent):
#layer variable is the layer name in ...
- 13.6k
30
votes
Accepted
How to display vertex markers in QGIS for non-editable layers?
No need to create a new layer. You can show your layer's vertices using the Outline: Marker line Symbol layer type.
Just add a new symbol layer
Add a new symbol layer;
Choose Outline Marker line (...
- 13.6k
30
votes
Accepted
How to add a node/vertex in a QGIS edit session?
With the Node tool (called the Vertex Editor in QGIS 3.0+) selected, simply double-click on a line segment you want to add a node to
- 8,172
23
votes
How to undo misclicks while drawing a polygon?
The latest inserted vertices can be removed one by one by hitting either Del or BackSpace keys.
It really seems to be undocumented in the current QGIS 2.2 manual at http://docs.qgis.org/2.0/en/docs/...
- 51.5k
20
votes
Recalculating full extent of File Geodatabase feature class?
Right-click the feature class in ArcCatalog and go to the Properties. In the Feature Extent tab, click on Recalculate. And voilà!
I'm using ArcGIS 10.2.1
18
votes
Accepted
PostgreSQL trouble editing points / lines / polygons in QGIS
Fixed.
The problem was is no primary key.
In pgAdmin do this request.
ALTER TABLE tableName
ADD PRIMARY KEY (id);
Example for planet_osm_line table and setting osm_id column ,as primary key :
...
- 549
17
votes
Reshaping Feature using QGIS
In QGIS you have a reshape tool: Reshape Feature in the Advance Digitising Toolbar. This is the icon of the tool
Like in ArcGIS, selecting the line that you want to reshape, use the tool to draw ...
- 3,507
16
votes
Accepted
Can PostGIS and QGIS provide dependable multi-user editing?
Since you're not worried about simultaneous edits on features, I'd say that in theory you have nothing to worry about. The main danger w/ QGIS is that simultaneous editors can stomp on each other's ...
- 19.3k
15
votes
Is there a quick way to invert a node selection in QGIS?
Invert Feature Selection accessible by the toolbar is the feature you seek:
- 702
15
votes
Accepted
Is it possible to disable editing for certain layers in a QGIS project?
It is possible to make a layer not editable in a specific project.
Open Project properties > Data sources and check the option Read Only for the layers that you want to make not editable.
- 3,507
14
votes
Create Features window disappeared?
There are two ways to get at the Create Features window from the Editor toolbar:
1) Start Editing. Right-click on toolbar and select "Editor"
2) In the editor toolbar: Editor > Editing Windows > ...
- 50.2k
14
votes
Accepted
Edit duplicate layer only in QGIS
No, because duplicate layers share the same data source.
I recommend to 'save layer as...' with option 'add saved layer to project' checked. This copy you may edit without changing the source layer.
...
- 13.7k
13
votes
Editing X,Y of point in shapefile using ArcGIS for Desktop?
Start editing that shapefile, double click on said point, right click on point and "move to" and it will give you an option to type in the x and y coordinates for where you want to move the point to. ...
- 181
13
votes
Accepted
Drag multiple vertices of different line features in QGIS
Possible workaround, maybe good as just temporary solution for few data:
Enable snapping (Settings --> Snapping Options...). Set snap to vertex and set some tolerance.
Create a "dummy" line feature ...
- 6,427
12
votes
Extending line by adding point at end of it using QGIS?
What you seek can be done easily using the digitizing tools plugin.
The plugin adds a new toolbar with a couple of new tools.
The tool you need for this task is the amend line.
It get active when you ...
- 13.6k
12
votes
PostgreSQL trouble editing points / lines / polygons in QGIS
The solution is to create a primary key, as already mentioned.
But by design, osm2pgsql does not garantee that the osm_id is unique. It can produce several rows with the same osm_id.
To edit ...
- 4,545
12
votes
Accepted
How to work on downloaded copies of database tables in QGIS
QGIS comes with "offline editing" functionality in core. This downloads the data to a local spatialite database, so you can work on an offline copy and the delay caused by network roundtrips is gone. ...
- 26.1k
11
votes
Seeking online WKT editor?
Take a look at Wicket, it's awesome:
http://arthur-e.github.io/Wicket/sandbox-gmaps3.html
The demo sandbox might be enough for you, if not you could probably use it to develop a simple Javascript ...
- 359
11
votes
Accepted
Documenting inability to Start Editing SQLite geodatabase layers in ArcMap?
It's not strictly read-only access. You can load data via copy/paste and import into a SQLite or SpatiaLite database. Tables and feature classes can be appended to using append or Load Data.
You can ...
- 126
11
votes
Adding new record with specific coordinates into shapefile using ArcGIS for Desktop?
The location coordinates of your feature are stored in a geometry/shape field in the attribute table, not a text readable field you can adjust. You can store the coordinates as attributes, but they ...
- 15.5k
11
votes
Cut/Clip/Split a polygon with another polygon from same layer
You can substract (clip) a polygon from another of the same layer by using the plugin Clipper. You have to choose the polygon you want to clip and then you do Vector->Clipper->Clip and the plugin ...
- 815
11
votes
Accepted
Alternative to 'Editors Merge' feature using ArcPy
You could use the arcpy.Geometry() object's .union() method:
>>> g1, g2 = [f[0] for f in arcpy.da.SearchCursor("BufferedPoints","SHAPE@")]
>>> g1
<Polygon object at 0x1929f830[...
- 29.4k
11
votes
Drawing line with specified length using QGIS?
You need to use Advanced Digitize tool which gives you the ability to specify the length and angle also. If the tool is not enabled, then you can enable it from View -> Panels -> Advanced ...
- 36.2k
11
votes
Accepted
Does GeoPackage support simultaneous editing?
I have no technical background on how Geopackage works internally, so after searching for information on the simultaneous editing capabilities of Geopackage and barely finding anything conclusive, I ...
- 134
11
votes
Accepted
Voronoi Diagram on a given polygon using QGIS
You can use the v.voronoi tool from GRASS to create voronoi polygons, and it will enables you to specify an extent based on layer extent:
- 36.2k
10
votes
Create Features window disappeared?
In Windows explorer copy and paste the following location in the address bar and replace username with your username on the machine with the arcGIS install on it.:
C:\Users\username\AppData\Roaming\...
- 1,933
10
votes
Adding new record with specific coordinates into shapefile using ArcGIS for Desktop?
The coordinates in the attribute table are numeric values that are not linked with the geometry.
If you want to create a large number of points with exact coordinates, I suggest that you create a ...
- 48.5k
10
votes
Accepted
Is there a shortcut to create only right angles while editing?
You can do this by selecting the drop down beside the trace tool in your Editor toolbar and selecting the right angle option as shown in the image below.
- 472
10
votes
Accepted
How can I enable topological editing in QGIS 3
In QGIS 3.4 you may need to enable Snapping toolbar by right-click the main menu bar and select Snapping toolbar, and you will find this menu:
The last three icons are Enable Topological Editing, ...
- 36.2k
Only top scored, non community-wiki answers of a minimum length are eligible