All Questions
1,688
questions
1
vote
0
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32
views
Convert ~14500 features into ~500 bounding boxes covering at least the same area in QGIS
I downloaded a shapefile from OpenStreetMap that covers all ocean and coastline.
This consists of around 14500 features. What I am trying to do is generate a number of bounding boxes (say 300-1000) ...
- 111
1
vote
0
answers
41
views
Grouping data points based on proximity and minimal count of attribute in QGIS
I am using QGIS to map animal counts on farms in the Midwest US and using a circle polygon to show where there are more than 30,000 animals between all the farms in that specific area. Each data point ...
- 11
3
votes
1
answer
48
views
Merging attributes from line layer and polygon layer in QGIS
I am using QGIS 3.32 and have a grid layer with hexagons (so polygons) and a line layer. I would like the hexagons, which are overlapping the line layer to "take on" the attributes of the ...
- 73
5
votes
1
answer
168
views
Rendering polygon by two variables in QGIS
I have a set of polygons with two variables "variable 1" which can take values A, B, C, D, and E and "variable 2" which can take values V, W, X, Y and Z.
I would want to render the ...
- 231
0
votes
0
answers
50
views
Extracting border from shapefile and then calculate distance to the border
I started with a states boundaries shapefile. I want to extract a part of state border and then calculate the distance of village centroids to the nearest point on this border. I have already ...
- 1
0
votes
1
answer
47
views
How to identify polygons in contact with other polygons with a shared boundary of at least 3 meters in QGIS?
As part of my Master's Thesis, I deal with the development stages of unbuilt building land. I intend to divide the units of unbuilt building land within the selected settlements into 5 levels and for ...
3
votes
2
answers
107
views
QGIS - Delete lines resulted from Symmetrical Difference/Clip
I used the symmetrical difference command with two shapefiles but the resulting layer containes lines due to minimal differences (see example picture below)
Is there a way to automate the removal of ...
- 33
0
votes
0
answers
17
views
Setting map extents in print composer using a polygon layer?
I have a group of data points that need to be encapsulated within different polygons. I have used the geometries by expression tool to generate a layer of these polygons. I'm trying to feed the ...
- 21
1
vote
1
answer
45
views
Calculate ratio of 2 polygons using QGIS modeler
Working with QGIS modeler, I need to do some arithmetic operations with some polygon areas.
Let's say there are 2 polygons in layer A and layer B. And I'm inputting them into the model using Vector ...
- 123
0
votes
0
answers
25
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
25
views
"Add Polygonal Object" button does not appear on toolbar
I use QGIS 3.36.2 and I would like to create Polygon by drawing directly on the map. So I would like to use the "Add Polygonal Object" button while edit mode but there is no one on my ...
- 1
0
votes
0
answers
40
views
QGIS - divide inside of polygon into smaller defined polygons
I have the following polygon in QGIS. It is roughly 260m x 20m
Within it, I would like to create smaller polygons like so in QGIS:
12 - 20ft rectangles
15 - 40ft rectangles
^ for 7 rows
(very badly ...
- 41
0
votes
1
answer
64
views
Creating a vineyard map with QGIS
I'm trying to plot dots (the vines) in an irregularly shaped polygon. they are in parallel rows spaced 1.4 m apart and the vines are spaced 1.2 m apart. The rows are at a 45º angle from N. I tried to ...
5
votes
3
answers
265
views
Creating list of adjacent polygons in QGIS
The answer to Using join in Mapviewer describes an effective way to count the number of adjacent polygons. However, I need to create a list of the adjacent polys.
I envision a process that generates ...
- 8,150
0
votes
2
answers
64
views
Converting vectorization (raster to vector) with small steps in values in QGIS
I have a raster file that contains water depths in m. The water depths are the only attribute and should be transferred to the vector layer.
The raster files have a cell accuracy of 1m x 1m. I would ...
- 19