shapely Questions
3
Solved
My data set consists of a LineString and I want to filter out the individual line segments of this LineString. More precisely, every single street segment.
Until now I have extracted the individua...
4
Solved
I have a function that outputs a grid of points as x and y numpy arrays for interpolation, but before I interpolate, I want to use Geopandas to perform an intersection with my research boundary (ot...
10
Solved
How do you get/extract the points that define a shapely polygon?
Thanks!
Example of a shapely polygon
from shapely.geometry import Polygon
# Create polygon from lists of points
x = [list of x va...
3
Solved
I am using Python 3.5 64 bit in Windows 7 64 bit, shapely version 1.5.13.
I have the following code that returned me a self-intersecting polygon:
import numpy as np
from shapely.geometry import P...
3
Solved
I am trying to interpolate a point onto a LineString in Shapely and then split the linestring accordingly. However, due to a precision error, Shapely thinks that the interpolated point is not on th...
3
Solved
I'm trying to (roughly) equally space the points of a line to a predefined distance.
It's ok to have some tolerance between the distances but as close as possible would be desirable.
I know I could...
4
Solved
I found the envelope class in Java's JTS library very handy. An envelope holds the minimal and maximal coordinates of a geometry and is also called bounding box sometimes.
I wanted to get the comm...
13
I use Python in Fedora 19. I wanted to run the following line:
import shapely.geometry
but the following error appears:
OSError: Could not find library geos_c or load any of its variants ['libgeos...
3
Solved
I used to use shapely to make a cirle and plot it on a previously populated plot. This used to work perfectly fine. Recently, I am getting an index error. I broke my code to even the simplest of op...
Mitchum asked 30/1, 2023 at 16:46
4
I'm trying to extract the polygons from multipolygons in Shapely. I can transform a list of polygons into multipolygons using MultiPolygon from Shapely.
>>> Multi = MultiPolygon([shape(po...
3
Solved
There are a lot of questions here about matching points in polygons efficiently (examples: Here and Here). The primary variables of interest in these are high number of points N, and number of poly...
4
I tried to create a polygon shapefile in QGIS and read it in python by shapely. An example code looks like this:
import fiona
from shapely.geometry import shape
multipolys = fiona.open(somepath)
...
2
Solved
I am working with the Shapely library in Python. I find the intersection of two lines, the return value is given as a MultiPoint object.
How do I deconstruct the object to get the individual poin...
2
Solved
I have a case which is based on projecting a point on a line and then separate this line on it. My use case is slightly more complicated, but my problem can be reproduced with the following code:
...
3
Solved
I have a large number of polygons (~100000) and try to find a smart way of calculating their intersecting area with a regular grid cells.
Currently, I am creating the polygons and the grid cells u...
9
Solved
I want to use Shapely for my computational geometry project. I need to be able to visualize and display polygons, lines, and other geometric objects for this. I've tried to use Matplotlib for this ...
Floribunda asked 4/4, 2019 at 18:4
2
Solved
I have a GeoDataFrame (let's call it Destinations) that was made from a point shapefile using GeoPandas. For every feature (correct me if the terminology is wrong) in Destinations, I need to find t...
2
Solved
The Docstring says:
Polygon.contains Returns True if the geometry contains the other, else False
Polygon.within Returns True if geometry is within the other, else False
How are they different?
2
Solved
I am using CV2 to find contours from an image and then converting them into polygons using Shapely. I am currently stuck because when I try putting one of the contour arrays into Polygon() from Sha...
2
I have seen this question asked but have not really been able to find a full response. I have a simple shapely polygon, called polygon. I would like to extract this polygon as a binary mask (ideall...
2
Solved
I created a list of Shapely Point objects based on the point data set. How can I plot this list of points below?
points = [Point(-4.85624511894443, 37.1837967179202),
Point(-4.855703975302475, 3...
Eparch asked 19/12, 2019 at 23:7
3
This is code that used to work previously, but doesn't anymore:
import geopandas as gp
from shapely.geometry import Polygon
a = Polygon([(0, 0), (0, 1), (1, 1), (1, 0)])
b = Polygon([(0, 1), (0, 2...
4
Solved
Linestring1 = LINESTRING (51.2176008 4.4177154, 51.21758 4.4178548, **51.2175729 4.4179023**, *51.21745162000732 4.41871738126533*)
Linestring2 = LINESTRING (*51.21745162000732 4.41871738126533*, *...
4
Solved
I have two points A (10,20) and B (15,30). The points generate a line AB. I need to draw a perpendicular line, CD, on point B with a length of 6 (each direction 3 units) in Python.
I already have...
2
Solved
I am running the following script which I believe should be returning TRUE for the point being in the polygon but it is returning FALSE.
from shapely import geometry
polygon = [(-1571236.83497071...
Strained asked 11/9, 2018 at 17:15
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