All Questions
117
questions
2
votes
1
answer
44
views
How to determine data used for plotting polygons in QGIS
I have this shapefile of soil characteristics in Massachusetts, but when looking at its attribute table, I can't determine what values are being used to plot each polygon. This becomes an issue when I ...
- 33
2
votes
1
answer
865
views
Splitting feature into individual features in QGIS
In QGIS I have a layer that is made up of a large number of polygons that are merged together to form one feature. Is it possible to split this feature into the individual polygons that make it up so ...
- 163
3
votes
2
answers
1k
views
Selecting points which touch "boundaries" of another polygon using QGIS
I have an quite complicated polygon shapefile and a lot buffers around points (second shapefile).
These small polygons are within and outside of the big polygon. I need to select those polygons which ...
- 97
1
vote
0
answers
392
views
QGIS. Combining points data on a map with attributes in polygons
I have a project where I'm trying to combine flood risk data to a list of postcode (/zipcode) data. The postcode data is a csv that contains each postcode's easting, northing, longitude, and latitude ...
- 11
2
votes
1
answer
268
views
Rendering NULL values with joined CSV file in QGIS
I have a set of polygons in a single shapefile layer. I have added a data table as a new layer and joined the two layers. Some of my polygons do not have entries in the data layer and consequently, ...
- 135
2
votes
0
answers
108
views
Dissolving polygons within another polygon in QGIS
I have multiple pixels in a shapefile 'delete_pixels.shp' that are within a different polygon 'delete_id.shp'.
I would like to dissolve the pixels that are within the polygons of 'delete_id.shp'. ...
- 925
0
votes
0
answers
298
views
Can't see polygons of a shapefile but attribute table is fine
for some reason I can't visualize the shapefile I create even when trying by Zoom to layer. When checking the attribute table is fine. I attach here and image of the shapefile information just in case ...
7
votes
2
answers
275
views
Dissolving polygons that intersects in QGIS
I want to gather all the polygons in my shapefile that intersects with each other in several groups. If they had shared a common field I would have used the "Dissolve" tool but they don't ...
- 347
1
vote
1
answer
92
views
Applying correction value to shapefile due to older handheld GPS error in QGIS
I didn't realise that a limitation of an older handheld GPS may be that it would always be off target. After uploading polygon coordinates for a number of areas, I realised that the polygons were ...
- 21
1
vote
0
answers
29
views
Advanced digitizing not providing horizontal figures [closed]
I am using QGIS 3.16.3, working in a project EPSG:25832. After enabling a polygon layer and the advanced digitizing, when I add a feature (e.g. a rectangle), at the first click the figure is built ...
- 11
1
vote
1
answer
442
views
Converting polygons to lines and finding intersection between lines and polygons from another layer using QGIS
I am using QGIS 3.16.2 (Hannover) in windows 10.
I have three two different layers of polygons.
How do I find the intersection point between the polygons (Pink ones) and the buildings (Violet ones)?
...
- 39
0
votes
1
answer
760
views
How to set image as background for a shapefile polygon using QGIS
I would like to change the background of a polygon to an image using QGIS. Under Symbology, there is an option for Raster Fill but the .jpg image is so zoomed in you cannot see it. Is there a way to ...
5
votes
1
answer
277
views
Creating polygons with "Create shapefile layer" always produce multipolygons instead of polygons when saving in QGIS
Not sure if is a bug or I'm missing something.
Every time i'm creating a new shapefile with "Create shapefile layer" i got a multipolygon instead of a polygon (at least is what I'm expecting)...
- 233
1
vote
1
answer
355
views
Making a for loop/function testing geometries' intersections for multiple time-units in R
I have two multipolygons and I want to test intersections between their geometries based for different cycles of years.
Basically I have a flood dataset that contains flood events and their geometry ...
- 173
5
votes
1
answer
2k
views
Import CSV into polygon shapefile
I have commune level map in shapefile and CSV.
Originally, I have shapefile, exported it to CSV, then to STATA for data manipulation. Then I have exported it as CSV to import to QGIS as polygon.
I ...
- 173