All Questions
1,510 questions
2
votes
1
answer
99
views
Getting layer last modified value with QGIS Expression
I am working on some revision tracking and would like to present information about when layers saved in a GeoPackage were last edited using an expression. I can create a custom function if necessary.
...
- 2,002
0
votes
0
answers
24
views
QGIS attributes form cascading value relation and "multi edit mode"
I have an attributes form with two dependent dropdown objects - let's call them categ_field and subcateg_field. Each of them refers to the corresponding field of my geodataset: categ_field and ...
- 948
0
votes
0
answers
36
views
Cannot edit vertexes of a newly added element in a PostgreSQL view in QGIS
I usually work in QGIS with many views created in PostgreSQL that I edit directly through triggers. Since I've started working this way I found out a problem: Every time I insert a new feature I ...
- 11
0
votes
0
answers
72
views
Calibration LiDAR derive DEM for flood inundation risk map
I need to create a flood model based on a LiDAR-derived Digital Elevation Model (DEM). However, I am encountering an issue:
The line dividing the DEM into two parts shows that the right side is ...
0
votes
1
answer
49
views
How to make uneditable layers editable in ArcGIS Pro [closed]
I am new to ArcGIS Pro and GIS in general. I am trying to copy data from a map layer onto other layers. However, the desired destination layers are not editable, so I am unable to copy data onto them. ...
1
vote
1
answer
49
views
QField - can not edit attributes on local layer
When I open a specific local file in QField, I don't see the letter A with the pencil to edit. In another file, I can see it and I can edit the attributes. How is this possible?
I have made sure the ...
3
votes
0
answers
23
views
ArcGIS Pro editing tool divide only allows for 50 graduations of a line segment?
I have an 2,047 foot line in a WaSPN(ft) CRS. I want to divide this line into 30 foot segments. I am trying to use the Divide option in the Modify Features Tools pane. The tool only allows for no ...
- 10.5k
0
votes
0
answers
73
views
Going back to earlier version of shapefile that was saved in QGIS
By mistake I edited all cells of a table in QGIS. I saved it without knowing that and I need to go back to the earlier version, before it was saved. Is there a way to do it?
0
votes
1
answer
30
views
Cannot make changes to attributes when Qt Designer UI is launched by identify feature
I have created a QGIS form for a layer using qt designer. When I open the layer's attribute table I can edit and save changes to attributes through this form without issue. When the form pops up as ...
- 1
1
vote
0
answers
35
views
Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022
I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...
- 11
1
vote
2
answers
85
views
WMS layer editing capabilities [closed]
I'm currently writing my thesis with QGIS. I have a WMS layer that shows many plots and the classification of these plots. I need to edit this layer so that only plots with classification I-III are ...
- 19
2
votes
1
answer
96
views
Adding attribute values to existing GeoPackage with PyQGIS
I have an existing GeoPackage and want to copy Features from another layer to this one using PyQGIS and execute it inside a QGIS Macro. For that, I have the following code:
from qgis.core import ...
- 55
0
votes
0
answers
39
views
Selecting multiple sections within polygon to create multiple separate polygons in QGIS
I have a large polygon split up into many different sections. Each section has an ID number ranging from 1-13. I want to be able to select all polygons with a certain ID, and then create a separate ...
- 11
2
votes
1
answer
100
views
"TypeError: unsupported operand type(s) for /: 'QVariant' and 'int'" when automatically updating with PyQGIS
Using the Python Console I would like to update multiple columns at once that run the same function. I have a list of column names and a function, there is a for loop that should iterate through the ...
- 495
3
votes
1
answer
54
views
When moving vertex node, change the shape of each polygon that contains this node in QGIS
I digitized a surveyor's map, creating many polygons in a 1:7000 scale so that all points are almost in their correct location.
I switch to a 1:1000 scale, both image and QGIS screen and want to fine-...
- 161
0
votes
0
answers
28
views
QGIS - Geometries constantly in error
I m doing a lot of polygon editing in QGIS for a mapping project (matching polygons up to aerial photo patterns) - mostly by manually moving nodes, using the Merge Selected Features and the Split ...
- 31
1
vote
1
answer
91
views
How to modify a feature's JSON attribute on PostGIS with QGIS
I want to edit (with QGIS) an attribute of my feature stored in PostGIS. First, I select the feature using one of the buttons below.
Then I use the edit feature button (Modify the attributes of all ...
- 969
0
votes
0
answers
22
views
When I modify the layout of a line, in a GDB ArcMap, the modification is not displayed. How can I solve this problem?
I am updating the route layout (lines) of a cartography that is in an ArcMap GDB; I have found that being in the same Feature Class, updating your layout and stopping editing, your new layout is not ...
3
votes
3
answers
221
views
Aligning surveyed point layers in QGIS
I’m wondering if QGIS has a tool to align the lat, long, and alt data of two point layers based on a common point. I have data like this:
Survey 1 points:
A
B
C
Survey 2 points:
C
D
E
I’d like to ...
- 31
0
votes
0
answers
43
views
Write from ArcGIS Pro into n:m tables in SQL Server database
I would like to use ArcGIS Pro to access an existing structure in SQL Server (see image) with editing options. In addition to the columns listed, the MainTable also has spatial information (X Y points)...
- 17
0
votes
2
answers
165
views
How to clip multipart polygons in ArcGIS Pro using editing tools
I have numerous multipart polygons running along corridors that I am trying to "split" at intersections. The polygons may or may not be present at the intersections, but there are always ...
- 5,847
0
votes
0
answers
108
views
How do I stop vertex jumping when editing line features in QGIS with shapefiles?
I've been using QGIS 3.34 (previously 3.28) for editing shapefiles containing line features. However, I've encountered a persistent issue: occasionally, while editing a feature, a vertex from a ...
- 23
0
votes
0
answers
30
views
In ArcGIS Pro, multiple line features (water main) were unknowingly created on top of each other. How?
I help manage the public works GIS database for our water infrastructure. Someone noticed that there had been 5 new main (line feature) insertions and that these all existed one on top of the other.
...
- 3
0
votes
1
answer
325
views
Edit GeoParquet layer on QGIS
I have a geometry which is GeoParquet format. I want to edit it in QGIS , however, I can't toggle the edit mode:
Is there any way I can edit the layer without converting it to other format?
It is ...
- 2,215
0
votes
0
answers
46
views
What data does clustering use from multiple raster files?
I currently have a series of rasters of the same area across different times. The data is categorical: the product of a supervised classification used on LANDSAT data run on ERDAS Imagine. Each ...
- 23
0
votes
0
answers
29
views
OS MasterMap layers being affected when editing other shapefiles using ArcMap
We use ArcGIS 10.2 to draw and edit simple grounds maintenance plans for Estates that we manage. I've done this for years, using OS MasterMap as the base. I've now got an issue that when creating or ...
- 1
1
vote
1
answer
97
views
Change select color in a raster in QGIS using Serval or Value tool
Is it possible to edit the table view of a raster that you see in the Value tool?
Alternatively
Using Serval, once we have a selection polygon can we choose a specific range of raster values within ...
- 8,298
2
votes
1
answer
108
views
Does QGIS have a functionality similar to Flicker in Erdas Imagine?
I am trying to replace an Erdas Imagine workflow with QGIS and I have got most of it working but can't find a solution for fliker. We have it set to turn an image on and off every few seconds to ...
- 8,298
0
votes
0
answers
38
views
Edited shapes become invisible
I´m working editing shapes in a geodatabase with Osgeo. The last editions become invisible until I make a new edition.
The problem is that the last editions become invisible until I make a new ...
0
votes
0
answers
34
views
Erdas - Export LUT Instead Of Real Values
I am using Erdas 2022.
I have NDVI index of an imaging, and after creating it, the view shows a LUT which is not the original pixels, which is essentially the automatic stretching of the program.
I ...
- 101
1
vote
0
answers
30
views
Synchronizing qgsofflineediting database data back to remote layers using PyQGIS
I have a situation where I need to find the path(database) of GeoPackage, if the path has already exist then I need to use the existing GeoPackage data to load the offline data using qgsofflineediting ...
- 49
1
vote
1
answer
846
views
Moving individual polygons in QGIS
In QGIS I am using the "BreederMap" plugin to define the layout of a large wheat field trial with 10m2 plots. Unfortunately, the lines are not exactly straight (sowing done without GPS and ...
1
vote
1
answer
637
views
Syncing ArcGIS Pro and ArcGIS Online
I published a WebMap from ArcGIS Pro to ArcGIS Online. Going forward, I wish to make all my changes to the data in this map in ArcGIS Pro but I want the changes to be reflected on ArcGIS Online.
I do ...
- 23
0
votes
0
answers
41
views
Add a single value to all records of new field using ArcGIS Pro
Using ArcGIS Pro, how can I implement a new field with one value to all the records without having to insert it one by one?
1
vote
2
answers
161
views
Changing attributes of a newly created feature in Python form init code
I have a layer with two attributes: "text" (string) and "int" (integer).
I used drag'n'drop form design to have a form with just the "text" attribute in it.
I added ...
- 11.3k
1
vote
1
answer
105
views
Setting a Boolean field to be empty
I have a layer with a Boolean field called bool.
I can set the field value to NULL, e.g. using the Field Calculator.
When printed via Python, the values are correctly shown as None:
>>> layer ...
- 11.3k
0
votes
0
answers
46
views
Excluding 'No Data' Pixels When Counting number of pixels in an AOI with ERDAS IMAGINE
I'm working with Landsat imagery in ERDAS IMAGINE 2014 and have encountered an issue with 'no data' pixels within my Area of Interest (AOI). The AOI includes unwanted 'no data' pixels that are ...
0
votes
0
answers
56
views
Login and edit OSM in QGIS?
Is there a way (e.g., with a plugin) to log into my OpenStreetMap account within QGIS and edit maps there?
- 230
1
vote
1
answer
127
views
Move feature with a mouse without using the Editor widget?
Using ArcGIS Maps SDK for Javascript 4.28, is it possible to Move a feature in a featureLayer, without using the Editor widget?
The Editor widget has a mode whereby after Selecting a feature, when you ...
- 21.3k
0
votes
0
answers
39
views
Editing WFS-T polygon layer gives me random geometry shape instead of current displayed geometry
I have this setup:
1-Postgis polygon layer
2-Published layer in Geoserver (granted access to everyone)
3-Configured workspace for all possible services including WFS-T
4-Disabled cached layer ...
- 1,179
1
vote
1
answer
194
views
Editing in QGIS vertex tool
By opening a multipolygon shape file, and enabling Vertex Tool (under Edit->Edit geometry) am able to see the X, Y coordinates of the points making the polygon. When i use Vector->Geometry Tools-...
0
votes
0
answers
72
views
What does the metadata tell you about an image and its sensor?
I'm using a software called ERDAS and my tutor says that the Metadata can be used to detect which sensor your image came from. Is there anything you can tell me that links the metadata to the sensor?
...
0
votes
0
answers
22
views
Merging Subswaths with ERDAS Imagine
Does anyone have experience with merging subswaths of a SLC Sentinel 1 image in ERDAS Imagine? I cannot find the right function for it.
1
vote
1
answer
115
views
Toggle editing does not work for Digitizing forms in QGIS
I have QGIS 3.32.3-Lima under Ubuntu 22.04.3 LTS.
I created a new GeoPackage layer to draw a rectangle. I hence added the tool bar "Digitizing forms" as well as the tool bar "Advanced ...
- 115
0
votes
0
answers
30
views
I need a shapefile of New South Wales suburbs where I can edit attribute fields
I need a shapefile of New South Wales suburbs where I can edit attribute fields. ABS will not grant access. I wish to create a map of Tweed Shire suburbs with their percentage of population aged 65+
- 13
0
votes
0
answers
91
views
How to grant editing permissions for editing shapefiles
A user in my company is trying to edit shapefiles on his machine via ArcMap. However, when he tries to start an editing session, he gets an error message saying no layers are editable and warnings ...
- 143
5
votes
1
answer
87
views
Setting QgsVectorLayer created from CSV in editing mode with PyQGIS
I'm working on QGIS 3.28.10 and I want to create a QgsVectorLayer from a CSV file with PyQGIS script, but the resulting layer is not editable. Does anyone know how to set this layer as editable?
My ...
- 53
0
votes
1
answer
350
views
Reshape a feature by tracing another edge without using topology in ArcGIS Pro
In ArcMap I could select a feature to edit, select "reshape" and then turn on tracing to follow a line I want to align with, but in ArcGIS Pro I can't find this functionality, only the "...
- 313
0
votes
0
answers
35
views
ArcMap basemap not dynamically responding to editing
I am having an issue with editing on a basemap. For instance, while my editor is active and I am dropping points (tree shapes) on the basemap, I cannot see them until I move the map with a pan a bit. ...
- 1
0
votes
0
answers
111
views
Bezier editing tool - problem with plugin
Have been using Bezier editing tool for a while in QGIS but for some reason I couldn't find it anymore. When I tried to install it again I was recieving this message :
Python error : Couldn't load ...
