All Questions
Tagged with linestring python
84 questions
2
votes
1
answer
115
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
2
votes
1
answer
50
views
Extracting linework from a GeoDataFrame
I have raster data where each pixel is assigned a feature id and the features form connected pixel regions. We could think of this as a rasterized map of different countries.
raster = np.array([
[...
- 143
2
votes
0
answers
86
views
Remove side branches from linestring
I'm trying to create a centerline from a (curved) polygon. To do this I'm using the PostGIS ST_ApproximateMedialAxis tool. However, this creates a lot of side branches, whereas I only want to keep the ...
- 21
2
votes
1
answer
135
views
is this posible to extract coastline or border line from multipolygon geojson but keep them separate
i have multipolygon cities , how to get coastline or border line that not intersect with other cities, and keep separate each cities,
is that possible? there any software or programing method (like ...
- 23
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
4
votes
1
answer
165
views
Avoid losing overlapping areas when buffering line with Python
LineString is the path of the transport on the field with attached equipment. Is it possible to use GeoPandas or third-party Python libraries to find overlapping areas when buffering a path line to a ...
- 53
1
vote
1
answer
231
views
Parquet files and PySpark: creating linestring column from node references
I've used osm-parquetizer to convert my pbf files to parquet to parallelise my actions using PySpark and Apache Sedona to query as such. The schemas created by the parquetizer didn't have a geometry/...
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
votes
1
answer
328
views
Can't find LineString or Point for Python
I am trying to use PolyLabel. I did a pip install shapely first. But the
from shapely import LineString
fails to find LineString.
Also, in polylabel there is an
from ..geometry import Point
which ...
- 111
1
vote
2
answers
1k
views
How to show points on LineString in QGIS?
I created a shape file with the following schema in python:
schema = {
"geometry": "LineString",
"properties": {"id": "int"},
}...
- 345
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
3
votes
1
answer
2k
views
Converting column with LineString geometries to np.array
I have a GeoDataFrame of a street network with the geometry of each row as a LineString. Say something like:
type id tags geometry lanes bridge name highway
0 way 34953479 {'...
- 337
0
votes
0
answers
299
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
1
vote
1
answer
2k
views
Replace MultiPoint, GeometryCollection & LineString geometries in shapefile with Point geometries [closed]
I have a geopandas dataframe that contains shapely MultiPoint, LineString, GeometryCollection and Point geometries. Cannot save the the geopandas because of this neither perform other operations (...
- 175
3
votes
1
answer
584
views
Extract river nodes from linestring [closed]
I want to extract the coordinates of river confluences.
I have a shapefile of rivers in a watershed. I want to get the coordinates of each point where a river joins another.
import geopandas as gpd
...
- 175
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
4
votes
1
answer
3k
views
Creating a geodataframe from a list of LineStrings or routes
I have created a separate LineString for each origin-destination couples
of subdivisions and I did it manually cause when I use a for loop it creates a dataframe with 1 LineString from all lines...
...
-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
2
answers
8k
views
Splitting MultiLine or LineString into equal segments of particular length using GeoPandas and shapely
I don't have a license for any software. So, I want to do it in Python.
How do I split the multiline or any linestring into equal segments by taking the length as input?
This is the code that I am ...
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
0
votes
1
answer
883
views
Creating LineString geometry from Point geometries with Python's OSGEO/OGR library
Is it possible to create a LineString object with Python's osgeo/ogr library starting from multiple Point objects?
For example, I know from the Python GDAL/OGR Cookbook that I can create a ...
- 2,749
0
votes
1
answer
4k
views
Something wrong with GeoJSON for LineString
I'm using Python's GeoJSON package to created a simple LineString, put it in a Feature, and put that in a FeatureCollection I'll call featColl. featColl.errors() returns no errors. Below is the dumped ...
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
0
answers
1k
views
Super-efficient geo-intersection operations in Python
I am working with big spatial data. I have about 2.3 million multilinestrings (driven routes) and I seek to count the number of intersections of each individual multilinestring with a set of ~60-150 ...
- 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
1k
views
Clipping GeoPandas dataframe containing linestrings with polygon boundaries creates multilinestrings
I have generated GeoPandas dataframes with several LineStrings like the one below
id geometry
0 2 LINESTRING (499944.093 7655354.222, 499943.989...
1 ...
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
5
votes
1
answer
576
views
Difference between LINESTRING((x1 x2), (x3 x4), (x5 x6), (x7 x8)) and LineString([(x1,x2), (x3,x4), (x5,x6), (x7,x8)])
I am a little confused about how objects are being defined and represented and mostly because some of the solutions I find for solving issues I have demand that the input data be in an other form than ...
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
673
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
2
votes
0
answers
482
views
Calculating length along multiple line segments in GeoPandas [closed]
I would like to calculate the distance between two points. They are connected with multiple line segments. Each LineString only consisting out of two points. How do I connect these LineString segments ...
- 21
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
7
votes
1
answer
1k
views
Change linestring values with GeoPandas
I'm working on a stormtracking project, and I realized that the longitude sign of some values in my GeoPandas dataframe are wrong; i.e. I need negative longitudes instead of positive ones.
When I ...
- 71
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
2k
views
Density per grid cell
I have a shapefile with the following format. These are storm tracks and each unique "Serial" represents one storm track.
import matplotlib.pyplot as plt
import geopandas as gpd
input = &...
- 21
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