All Questions
117
questions
0
votes
0
answers
27
views
"ERROR: 22001: value too long for type character varying(6)" for polygon shapefile
I am facing an error
ERROR: 22001: value too long for type character varying(6)
while uploading a shapefile to online govt. portal. When I asked the person only mentioned that there is problem with ...
- 20.2k
2
votes
0
answers
62
views
Why are there so many slivers in my polygon shapefile?
I georeferenced a map and then traced a vector polygon shapefile over it, but when I dissolve it I am left with an enormous amount of slivers. All the vertices are snapped as far as I'm aware. What ...
- 341
2
votes
1
answer
140
views
How to identify holes of missing geometry enclosed within a polygon in QGIS?
I want to locate or highlight all the holes (invalid interior rings that do not connect at all vertices and edges) and redundant geometry in a polygon shapefile in QGIS so that I can go back and ...
- 74.8k
-1
votes
2
answers
191
views
Locate or find holes tool in QGIS for polygon shapefiles [closed]
I want to locate or highlight all the holes (invalid interior rings that do not connect at all vertices and edges) and redundant geometry in a polygon shapefile in QGIS so that I can go back and ...
- 73.1k
7
votes
2
answers
2k
views
Calculating shortest distance between points within polygon using QGIS?
I performed a transect in which I sampled several animals. The location of these animals are represented by a point shapefile. I am interested in calculating a pairwise matrix of distance (in meters) ...
- 347
2
votes
0
answers
37
views
Merging smaller polygons into bigger surrounding polygons in QGIS [closed]
I am using QGIS 3.34.2 (Prizren). I am using a village-level shapefile which I downloaded from SHRUG. I have to use only the villages in West Bengal for an analysis. Furthermore, I need to combine the ...
- 31
0
votes
0
answers
39
views
Problem with create line tool in QGIS, creates an undeletable line that is not part of any layer
I was attempting to edit a shapefile layer in QGIS. I used the "create line tool" and started to sketch out a shape. I didn't like how it was turning out and tried to cancel it by pressing &...
0
votes
1
answer
50
views
What is meaning of extra bytes in .shp file or how to calculate content length
I'm trying to read a .shp file. That .shp file contains polygon type. So I read all the records perfectly, after the reading the points, end of the file that have some 28 bytes are there what is ...
- 20.2k
1
vote
1
answer
132
views
Create a map of time since fire in QGIS
Using QGIS I want to create maps which visualise the fire history of an area, in particular the time since the last fire.
I have a shapefile which contains polygons of each fire that has occurred in ...
- 74.8k
0
votes
0
answers
44
views
Buffer output issue QGIS
I'm using QGIS 3.18 version. I tried to use the buffer tool with the centerline (provided for a sample) of the road.
I found overlapping of buffer polygons and some unusual shapes of polygons too. I ...
- 20.2k
2
votes
0
answers
49
views
QGIS highlighted cell issues
Does anyone know why this is occurring? I obviously want the yellow highlighted polygon boundary to be always on top. Currently, the non selected shared boundaries are rendering on top of the ...
- 41.1k
2
votes
1
answer
78
views
Splitting polygons between two shapefiles in QGIS
In QGIS I have two overlapping shapefiles. Is there any way, where I can select polygons from the 1st shapefile and trim everything that overlaps with them, in the 2nd shapefile?
- 33.3k
3
votes
2
answers
10k
views
Extracting and saving polygons by attribute in QGIS [duplicate]
I have a shapefile layer from a vegetation mapping project with 417 polygons that represent 21 different vegetation classes. These are stored in a single column called "type".
I want to ...
- 33.3k
2
votes
1
answer
175
views
Creating new layer with custom regions from states boundaries in QGIS
I am trying to create a map where I can combine a layer of states boundaries and one other with custom regions (Est/West) on QGIS.
So I have tried it in different ways (union, intersection, merge ...
- 21
123
votes
8
answers
354k
views
Calculating polygon areas in shapefile using QGIS
How do I calculate areas of an area shapefile in square meters (m²) or in acres (ha)?
I didn't find that functionality in the Vector Tools.
- 33.3k