All Questions
17
questions with no upvoted or accepted answers
3
votes
0
answers
82
views
QGIS - Layer missing polygons after pointsfile transformation
I'm using pointsfile transformation in QGIS for the georeferentiation of my layers. After the transformation the result some times has polygons missing like here:
Why is this happening? How do I ...
- 65
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
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 ...
- 21
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
2
votes
0
answers
181
views
Clip Raster by Mask Layer - Nodata output
I am trying to clip a raster around a polygon shapefile. I have managed to do it for a series of polygons with the same raster, however one polygon is returning a blank clipping with 'nodata' in each ...
- 21
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
1
vote
0
answers
121
views
Clipping polygons to the base map shoreline
I was given shapefile polygons that were created with ArcGIS and I when I imported them to QGIS 3.1 they are no longer clipped to the shorelines of a base map. I am hoping there is an easy way to ...
- 29
1
vote
0
answers
73
views
Automatically deleting lines within generated polygon using QGIS?
How do I automatically delete lines within a generated polygon?
what I have: is a polygon with lines within. The lines I want to be deleted automatically -- like a auto clean up.
This is what I did: ...
- 11
1
vote
0
answers
89
views
Output Error from SimpliPy in QGIS
I am trying to simplify a polygon layer of parliamentary constituencies in Kenya using SimplyPy in QGIS and appear to be getting an erroneous result.
The method is working for most of the polygons ...
- 531
1
vote
0
answers
213
views
Shapefile layer export issue
I am using QGIS to define polygons in a shapefile layer which I am then exporting as an ESRI shapefile for use with JMP.
The polygon layer looks correct on-screen in QGIS, but the exported files have ...
- 11
1
vote
0
answers
131
views
QGIS Partitioning Regions
I have to polygon shapefile maps in QGIS that cover the same area. One with ~90 polygons (call them regions) and the other with about ~800 polygons (call them zones). I want to add a data column in ...
- 191
1
vote
0
answers
1k
views
Convert polygon data into extreme lon/lat coordinates using QGIS
I'm very new to QGIS. I have a shape file of census blocks and want to use the data to plot points within each boundary using Google Maps api.
I figure the best way to do this is to find the extreme ...
- 33
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 ...
- 1
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
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 ...
