All Questions
46 questions
2
votes
1
answer
116
views
Multilinestrings to Linestring using Python
I have a geodataframe (download link) that contains the geometry of bus lines. It is a Multilinestring. I need to transform the geometry into a single Linestring.
My first idea was to use .explode (...
- 117
0
votes
2
answers
302
views
Shapely intersection cuts LineString into MultiLineString instead of LineString
I ran into a problem where shapely.intersection cuts a LineString into a MultiLinestring with lots of short lines instead of a simple LineString. The intersection is made between a circle (Polygon) ...
- 83
2
votes
1
answer
538
views
Python length of roads inside polygons
I have two datasets: one about each road in a country (and its linestring), and another one about the polygons of each region. I want to estimate the length of each road in the polygon that is ...
- 23
1
vote
0
answers
73
views
Adding overlapping routes when there is no overlapping route using buffer and union
I am trying to do something to do with routes, Let's say I have 3 routes rt1 and rt2 are overlapping routes that share some length but r3 does not overlap with either of them. How would I just add the ...
- 13
1
vote
0
answers
73
views
Mapping self-intersections of a transformed LineString
I’m using shapely to solve a problem in physic. My problem can be represented in 2D with a LineString. In order to solve my problem I need to :
Apply a transformation to the original LineString
Find ...
- 11
3
votes
1
answer
610
views
Getting the polygons contained in closed MultiLinestring using Python
Given a set of "streets", how can I get the "blocks" contained in those streets?
For example, I'd like to extract four blocks / polygons from this 2 x 2 "checkerboard":
...
- 318
0
votes
1
answer
2k
views
Shapely Split a LineString based on Intersections with other LineStrings
I'm new to using Shapely, and I have some question. I have a LineString and I wish to split it based on intersections of other LineStrings.
If the intersection turns out to be a single point, then we ...
- 31
1
vote
1
answer
129
views
How to split up Linestrings based on type and connectivity using Python? [closed]
I am working with a road network, where I extracted only the three main road types. In the next step, I would like to union all Linestrings based on their road type and connectivity. That means that I ...
- 35
1
vote
1
answer
535
views
Splitting multiple Linestrings into 1 metre parts with GeoPandas shapely
I have a GeoPandas dataframe which contains many rows and also a column named 'geometry' with the following input:
geometry LINESTRING (445125.050522556 5536587.67127983, 445124.450035...
I ...
- 11
2
votes
2
answers
1k
views
Merging LineString with MultiLineString with Python
Is it possible to use shapely or some other Python software to merge a LineString with a MultiLineString?
Shapely's ops.linemerge fails here.
I am attempting to merge segments of the same road, ...
- 318
0
votes
0
answers
300
views
How to smooth the Linestring after adding additional point?
Actually I am tracking vessel, where I am already having path, and current position. Now the trouble is, obviously the vessel will not be on same coordinates as provided in the path.So I want to ...
- 101
2
votes
0
answers
2k
views
Shapely intersection between LineString and multiple Polygons
I am trying to get a function to return True when a LineString intersects with any polygon in a list of polygons. Currently, I am using a for loop to iterate through all the polygons and check one by ...
- 21
5
votes
2
answers
2k
views
Exploding LineString into segments using Shapely
I am trying to find explode lines tool in QGIS equivalent in shapely or geopandas (which uses shapely anyway). does anyone know this?
note that geopandas.GeoDataFrame.explode() does not work because ...
- 969
2
votes
1
answer
922
views
Splitting line on intersection to another line using Shapely
I'm finding a solution for split a LineString on intersection to another LineString. My first solution is:
from shapely import wkt
from shapely.ops import split
first_line = wkt.loads('LINESTRING (28....
- 970
-1
votes
2
answers
5k
views
Finding distance from Point to LineString in meters using Python [closed]
I have tried this following method to find distance but it is giving me distance like 0.12. I don't know what that 0.12 is meant and I want the distance to be in meters or kilometers.
line.distance(...
2
votes
1
answer
6k
views
ImportError when importing Linestring from shapely.geometry [closed]
With this code I tried to import shapely.geometry:
import shapely as shp
import geopandas as gpd
from shapely.geometry import Polygon, Linestring
However, I faced the following error:
ImportError: ...
- 21
3
votes
2
answers
3k
views
Is there a way to "sort" points in a MultiLineString such that they seem more like a continuous LineString?
Is there a way to "sort" the points of a MultiLineString such that they follow a more sequential order? Let me illustrate what I mean with a graphical example:
Input
Suppose I have the ...
- 2,749
4
votes
1
answer
3k
views
Get the outer shape of a MultiLineString
i have a bunch of shapely MultiLineStrings, which I would like to "convert" to Polygons so that the "outer" boundaries of the MultiLineStrings serve as edges.
One of my ...
- 203
0
votes
1
answer
483
views
GeoPandas: Error plotting after clipping shapefile
I am interested in plotting data on the city of Göteborg (in English Gothenburg, Sweden). I am starting with shapefiles of Sweden and then clipping them to concentrate my study in Göteborg.
# ...
- 285
1
vote
1
answer
206
views
Delete polygons that have one or more side parts in common [closed]
I am trying to solve a particular case of comparison of polygons to others. I have five polygons distributed as in the figure below. The black polygon is the one with the largest area.
There may be ...
- 19
2
votes
0
answers
667
views
Create MultiLineStrings segments between points with Python Shapely
I have a layer of LineString and MultiLineString geometries. I'm trying to create a single geometry of the LineStrings split by certain snapped points.
This is an illustration of the current data that ...
- 31
0
votes
0
answers
390
views
Extrapolating arc via Python function
I am looking for a Python code/function that can extend an arc linestring up to a pre-defined length while maintaining the same arc of the original line. The idea is to repeat the configuration of the ...
1
vote
3
answers
2k
views
Python Create Dictionary with Shapely Points from Linestring coordinates
I have a Geodataframe with Linestring Z geometries as follows:
id_line
geometry
1
LINESTRING Z (0 0 0, 5 6 9, 1 2 3, ...)
2
LINESTRING Z (7 8 9, 9 8 7, 1 2 5, ...)
each of the Linestring is made ...
- 113
3
votes
1
answer
1k
views
Shapely strange splits when splitting LineString and Polygon
I noticed a strange behavior while splitting a LineString with e Polygon: in the below image I have a Polygon (in green) and two lines. If I split the blue Linestring with the polygon the result of ...
- 33
2
votes
0
answers
674
views
How to merge lines from shapefile using PyShp and Shapely and save them in a new shapefile?
I have files with line segments that cover road network of towns. The issue is that each street with specific name consists of smaller segments that I need to merge into one line covering the whole ...
- 223
3
votes
1
answer
670
views
Can't Form DataFrame from Parallel Offset Output
I've been developing code to take a .csv with lat-long coords and convert them to LineStrings before creating parallel offsets for them. This has been working so far, but yesterday after clearing my ...
- 31
2
votes
2
answers
1k
views
Shapely command error: from shapely.geometry import LineString
I am trying to run a program but getting the following error when I am using the command:
from shapely.geometry import LineString
Error: FileNotFoundError: Could not find module
'C:\Users\SWWB\...
- 21
0
votes
1
answer
6k
views
Calculating distance between two Linestring using Python
I have two linestring, each linestring represents a rail road. I am trying to calculate minimum distance between these two linestrings. Which function is efficient to do this?
I have only come across ...
- 19
2
votes
1
answer
445
views
How to add intersection vertices to a ShapelyLinestring?
Assume that I have two shapely LineStrings. I want to find their intersection and then add the intersection point as vertices into the respective LineStrings.
from shapely.geometry import LineString
#...
- 129
2
votes
1
answer
6k
views
Pandas dataframe to Shapely LineString using GroupBy & SortBy
I have a pandas dataframe that contains information to construct (poly)lines, and I want to use shapely & geopandas tools to make a SHP.
In the example below, I have 3 lines differentiated by &...
- 950
1
vote
0
answers
365
views
Points within "normal bounds" of a linestring in Python
I am working in Python (using Shapely). I have a list of Point(s) (the small circles in the image) and a LineString (the solid line with an arrow). I want to select only the points which are within ...
3
votes
1
answer
2k
views
How to find and remove invalid geometry in a multilinestring python geodataframe?
I have original data as a 700000's rows excel, with geometry data in hexwkb format.
I want to plot it and make some spatial operations on it like intersect, distance and buffer, on a jupyter notebook.
...
- 171
2
votes
0
answers
839
views
Failure to write LineString record to shapefile
I have some coordinates from which I am creating a shapefile.
tafo_boundary_coords = [(652316, 742792), (652161, 742920), (651897, 743166), (652210, 743477), (652298, 743448),(652375, 743458), (...
- 115
3
votes
1
answer
2k
views
Adding points every X distance along a LineString [closed]
I have a list of LineString coords:
list = [(90, 170), (99.0, 159.0), (321.0, 159.0), (300, 146), (296, 23)]
which looks like this.
How to interpolate a point at every X distance along the line ...
- 215
3
votes
1
answer
2k
views
Creating LineString from CSV with lat/lon coordinates of beginning and ending points
I am iterating through a CSV file of tornadoes, and for each row getting the beginning lat, beginning long, ending lat, and ending long. And I am trying to plot their line geometry on a map.
I got the ...
- 31
1
vote
0
answers
458
views
Cluster LineStrings using HDBSCAN?
I am trying to cluster a set of LineStrings (made out of lat/lon Points) with the help of HDBSCAN (using the "haversine" metric). The objective is to define the most "usual" path.
I have only managed ...
- 31
3
votes
2
answers
2k
views
Shapely floating problems with split()
Based on the answer of sgillies I want to use Shapely's interpolate() to find the points at which to split. But I experience that split() is sensitive to the points being precisely on the geometry you ...
- 377
1
vote
1
answer
2k
views
Shapely and lines intersection
Is there a way in Shapely to calculate intersections of geometries with some tolerance?
Imagine we have lines that are the same, but their coordinates are written with different precision.
...
- 2,344
2
votes
1
answer
696
views
Sliding box on Area Python Shapely
I have a huge area of linestrings and I want to get the features of each portion of area. All the linestring parts are stored in a python list and they are not in order.
One portion of area is shown ...
- 225
3
votes
1
answer
5k
views
returning a LineString on selecting its midpoint
I have a list of shapely LineString,
[<shapely.geometry.linestring.LineString object at 0x000001614D750CC0>, <shapely.geometry.linestring.LineString object at 0x000001614D750D68>, <...
- 611
5
votes
1
answer
8k
views
Shapely multiline string to shapefile as single line
I am using shapely unary_union to dissolve multiple line strings to one line before exporting to a shapefile.
The output from unary_union is a multiline string (example below which you can paste into ...
- 155
6
votes
1
answer
4k
views
Create smooth line from zigzag line
I've vector which looks something like this
My question is how I can make it smoother/straighter with less points and curves.
Note: I've tried using simplify api from Shapely, but no luck.
Update:
...
- 266
3
votes
1
answer
4k
views
Smooth linestring shapefile
Is there an algorithm to perform a smoothing of a linestring and maintain the original points?
- 121
2
votes
1
answer
560
views
Converting branched MultiLine into series of single lines in shapely
If I have a MultiLineString representing a branched network with a common starting point (red network in pic below):
Does anyone know how to convert this to a set of individual single-line strings in ...
- 2,110
2
votes
1
answer
578
views
Using forceToLineString() with GDAL and Python?
For my script I'm looking for a method to convert a MultiLineString into a simple LineString.
Example:
MULTILINESTRING ((0 0,0 1),(0 1,0 2),(0 2,0 3,0 4))
==>
LINESTRING (0 0,0 1,0 2,0 3,0 4)
I ...
- 73
7
votes
1
answer
3k
views
How do you fix Overlapping Lines?
I have a line dataset that contains some lines where the "end points" are actually found in the middle of the line. In the image below, the nodes are shown in green and one of the end points in red. ...
- 14.4k