Questions tagged [curved]
The curved tag has no usage guidance.
27 questions
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How to create a curved LineString in QGIS from a CSV file with latitude and longitude points, specifying a curving angle?
I have a CSV file with the following columns:
DepartLon: Longitude of the departure point
DepartLat: Latitude of the departure point
DestLon: Longitude of the destination point
DestLat: Latitude of ...
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30
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QGIS 3.34 Calculate area in curved geometries
I want to calculate the cartesian area of a curved geometry, a circle, with a radius of 2500 m.
First, I buffered a point with 2500 m radius and used the function "Convert to curved geometries&...
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1
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Using label placement via PyQGIS
In QGIS 3.28 I am trying to align my labels along line features but cannot get them in curved mode. I tried:
layer = iface.activeLayer()
layer.placement = Qgis.LabelPlacement.Curved
settings = ...
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211
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Exporting curved geometries as a GPKG with linear geometries
I have a layer (based on PostGIS or GPKG) containing complex, curved geometries (think MultiSurface(CurvePolygon(CompoundCurve(CircularString(...).
How can I export this layer as a new GeoPackage that ...
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QGIS specified make_line curved between points
This question is a continuation of this answer
I want to draw curved lines between specific points that are related to each other.
On my points layer each point has:
unique FID and relation field to ...
- 486
4
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3
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473
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Curved labels along parallels in different CRS / map projection (QGIS 3.4)
I'm trying to make curved labels based on map projection.
As in these examples, I would like labels for point layers to follow parallels. Is that possible in QGIS 3?
Or a labeling style like this:
...
- 351
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167
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QGIS Azimuth and Distance Plugin Right/Left Curve Input
I'm having a problem with left/right curve of radius rr and distance dd entry for the Azimuth & Distance Plugin. I've only used the plug in for straight lines and it has performed fine. I now have ...
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295
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Curved labels on curved arrows
I have straight lines in a metric CRS, connecting two points. So each line has exactly two vertices. I want to display these lines as curved arrows with curved labels above these arrows. QGIS version ...
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222
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How to create a curvy line joining 3 points in pyqgis3?
I am trying to draw a curvy line joining 3 points. I was using https://webgeodatavore.com/create-qgis-curve-from-python-api.html as reference but it is not giving desired output. I used ...
- 441
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Least-cost path = great-circle path in open ocean? (R) (gdistance)
I'm using R and the gdistance package to generate the shortest routes in the ocean. In the open ocean with no obstacles, the least-cost path should equal the great-circle path. But I can't seem to get ...
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79
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JavaScript libraries for converting curves to/from EWKT and GeoJSON
Are there any JavaScript libraries that can convert EWKT/WKT curve geometries (as defined by PostGIS) to GeoJSON or similar? That is, libraries that generate a linear approximation of a CIRCULARSTRING ...
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3
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330
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Selecting point features on the outside of line curves - QGIS 3
I need to select points that fall on the outside of line curves using QGIS3.
I have evaluated the curvature of the road and used that to select points that are within 20m of a "curved road" (...
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4
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1
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2k
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QGIS: Making flow-map, with curved arrows of different colours and varying sizes
I have a shape file for the World Map and the following data in text file (Added as delimited text layer):
I would like to use QGIS 3.10 to achieve three things:
a) To make a flow map to have CURVED ...
- 43
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2k
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OpenLayers drawing curves
I'm trying to draw a Bezier curve in OpenLayers (geometryFunction2) but there is something wrong with my approach I don't get. The first line seems fine but I can't place the next one. It work's fine ...
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2
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3k
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Drawing curved segment in QGIS
I have to create segments like the one in the picture:
I need to draw a segment where there is a straight line and other parts of segments with arcs of different angles.
The part of the segment that ...
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106
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Bending arrowlines between symbols (points) using MapServer [closed]
There is such a task: to draw a curved line with an arrow at the end between two symbols (points).
Questions:
What is the best way to bend a line defined by two points? (current solution: I find the ...
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145
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QGIS Linestring rendering curves between vertex
I'm sure I hit a setting somewhere, but now I can't fix it.
When a linestring shp file is rendered in QGIS it adds curves between my verticies... I want straight lines. How do I turn this off?
In ...
- 497
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304
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Creating curved annotations for polygons and lines in QGIS
In general, my problem is that: I can`t display annotations using the option "Using the perimeter (curved)" in QGIS. I tried to solve it in two ways:
At first was an attempt to use just a simple ...
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2
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1
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135
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Curved lines turn to straight lines after sDNA preparation
I am an architect, sometimes I need to use sDNA to analyze networks mapped in AutoCAD. But I met a problem with curved lines, i.e. circle, or polylines.
After importing .dwg file into .gdb, and using ...
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2k
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How to convert curved features into geojson
I'm using a MapGuide system which provides some CURVEPOLYGON(s).
Using python shapely's loads() raises a WKTReadingError.
Tried to find a tool that can approximate curved shapes into a polygon (as a ...
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1
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446
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Drawing curved lines in Carto?
I have a dataset that has the following structure:
City_Start / Lat_City_Start / Long_City_Start / City_Dest / Lat_City_Dest / Long_City_Dest
What I want to do is create a curved line between those ...
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2k
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Preserving Curve Geometries in Leaflet
Is there any way to represent a polygon geometry that contains a curve accurately in Leaflet (from WKT)? GeoJSON conversion from WKT is insufficient as it digitizes the points of a curve out to an ...
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59
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Multi segment curves in polygons (SDE) [closed]
I'm looking for a tool, like Curves and Lines
that would work on polygon layer. At the moment I'm reshaping them feature by feature. Some notes about the data
We use Oracle Enterprise Geodatabase (...
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127
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Measuring length of curved lines for district
I work in a country which is divided in election destricts(polygon shp). I have the roads of the country as a vector layer (vector shp).
I want to find a tool for QGIS like sum line lengths of qgis (...
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1k
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Creating curved lines between two points in QGIS
I am trying to create curved lines between two point in QGIS. There are a few posts that show how to create these lines (hyperlinks below). However, I am having trouble executing the code in QGIS.
...
- 325
2
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510
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How to properly deal with rectangles being curved on geographies?
I'm using Microsoft SQL Server to store simple data for administrative boundaries of the world (lots of polygons). I store this in a geography data type column. Afterwards I query these polygons by a ...
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159
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how to draw curved line in a qgsmapcanvas
i am working on a project with qt4.8.6, api c++ of qgis 2.8.2
we need to draw curved line in a vectorlayer by given 2 points and an offset by exemple
is it possible to do that with the c++ api of ...
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