Linked Questions

0
votes
0answers
154 views

Is it possible to “re-buffer” river polygon dataset? [duplicate]

I've river polygon data representing the water quality. This polygon data were derived from polyline dataset according to a buffer distance in the attribute table. Unfortunately I don't have this line ...
12
votes
4answers
14k views

Simplifying adjacent polygons using QGIS Simplify Geometries tool

I have a big Shapefile with 200,000 polygons but the file is too big for the application that will use it. I would like to generalise these polygons and create much smaller file. I have tried to do ...
6
votes
1answer
7k views

Merging polygon and line shapefiles into one using QGIS?

I have two shapefiles: One is a line feature of the rivers and waterways of London, the other is a polygon feature of the reservoirs, lakes and ponds of the same area. Is it possible please to merge ...
3
votes
0answers
2k views

Showing dimensions on polygons in QGIS?

I have a shapefile that contains all of the property parcel lines in King County, WA. We are currently displaying this data through mapbox on our site with no issues. We would like to be able to show (...
5
votes
1answer
535 views

Estimating a location at the minimum distance between a point and a polygon

I have two types of objects (i) polygons representing postcode areas, and (ii) points representing telephone exchanges. I want to find the part of the polygon that is closest to the exchange and ...
2
votes
1answer
452 views

Can you draw an actual line instead of a cutline with GDAL?

I'm fairly new to GDAL and I have some GeoTIFF files that I would like to highlight some bodies of water on. I have gotten pretty far, but I have one problem. The only way I am able to highlight a ...
0
votes
1answer
898 views

QGIS export to GPX: Error “Geometry type of 'multi polygon' not supported” (GPS tools) [duplicate]

I am trying to convert a shapefile with multiple polygons to a GPX file in QGIS 3.10.3, which has now repeatedly failed with varying export settings since "MultiPolygon" is not supported. I have ...
4
votes
2answers
149 views

Measure shortest distance between all points in a layer and a polygon's border line

How do I measure the distance between all points in a vector layer and a polygon (not to the polygon centroid, but to it's border line)? In the image points are fires and the polygon is a National ...
0
votes
1answer
298 views

How to exclude one specific polygon from a layer which have like 20 diffirent polygons? [closed]

I have a layer with like 20 polygons which I imported from Google Earth Pro. And what I am trying to do is to exclude (isolate) that one big polygon which is in a way of all other smaller ones so ...
5
votes
2answers
70 views

Extraction of line segments in front of the street

I have a layer of lines that represents a layer of plots. I want to eliminate all the inner segments to have only the segments that go out into the street. Thus, I want to determine the sum of the ...
3
votes
1answer
134 views

How to remove weird lines in QGIS?

I am really new to QGIS and I've imported this shapefile of UK with weird lines (the ones not denoted with the red crosses). What is the fastest way to remove these lines so that it leaves me with ...
-1
votes
1answer
170 views

Measure part length of polygon using QGIS

I have a polygon file of area boundaries and I want to measure part of the polygon lines in each area which next to the sea. Is there a way to do this? In theory I guess I could edit and make ...
3
votes
0answers
107 views

Extract the outer points of a Point Shape into a Line Shape? [duplicate]

I've installed QGIS 2.8.2 since a few days and have no experience with this application. I try to extract the outer points of a Point Shape into a Line Shape, like a shell for the inner points. All ...