Questions tagged [geopandas]
an open source project to make working with geospatial data in Python easier.
444
questions
1
vote
0answers
33 views
Python: distance of point to polygon border
I want to measure the distance of a point(lat,long) to a the border of a Polygon.
So I have created the polygon with the coordinates.
from shapely.geometry import Polygon, Point
Polygon(zip(lon_list, ...
0
votes
0answers
19 views
Legend of GeoDataFrame does not sort categorical data values
I try to plot a map of temperature with geopandas in Google Colaboratory. This is my dataset:
id = '1LOywA8JPP6vOFDP-CBOBgkSmX7zv2pDc'
downloaded = drive.CreateFile({'id':id})
downloaded....
0
votes
0answers
69 views
Coordinates format [closed]
How to read this Point(601872.0567818936 5789972.687450857)?
This point is consist of latitude and longitude. So I need to know how can I convert that to Degrees and Minutes?
Another example of the ...
0
votes
0answers
32 views
Cannot create geodataframe from feature class due to IndexError: list index out of range
I have a function that helps me read in large feature classes and them create a geodataframe:
line_feat = "S_Studies_Ln"
cnms_cols = ['REACH_ID', 'STUDY_ID', 'CO_FIPS', 'CID', 'FLD_ZONE',
'...
0
votes
1answer
74 views
Why do I get error “Runtime: b'no arguments in initialization list'” when running to_crs?
I have a geopandas dataframe that has POINT geometry in NAD83. I want to use to_crs to change them to espg: 4326. When I first bring in the feature class as a gpd dataframe, it shows no crs, so I use ...
1
vote
0answers
39 views
Distance between centriod of the polygon and each and every point of the polygon [closed]
I'm trying to calculate the distance between centriod of the polygon and each and every point of the polygon using GeoPandas Python
I need to find the distance between centroid(18.9568383649 72....
1
vote
0answers
21 views
Get all road intersecting a polygon
I am trying to read from a local instance of the OpenStreetMap database all roads intersecting a boundary coming from another database.
I actually get a result with the following piece of code:
#...
1
vote
0answers
24 views
How remove a duplicated coordinate in multipoints using GeoPandas?
I have shapefile river data in line format, import this data with GeoPandas and apply it to a .boundary to get as initial and final coordinates of each line. But as lines intersect a coordinate may ...
2
votes
2answers
55 views
Get field names in attribute table with Python
I have a geopackage file, with a layer called "MyLayer". Within this I have an attribute table with approx 20 attributes.
I can read in each attribute individually like:
import geopandas as gpd
...
2
votes
1answer
40 views
Calculating area of geometry using Geopandas? [duplicate]
Is there an easy way in geopandas to calcuate polygon areas after an intersection analysis?
I am switching from ArcGIS to open source and try to translate my code.
In ArcGIS I used:
arcpy....
0
votes
1answer
28 views
Mask rasterio raster with geopandas shapefile
I am loading a shapefile using geopandas as follows:
import geopandas as gpd
StudyA = gpd.read_file('.../Study_Area_Polygon.shp')
Next, I am using folium to plot it interactively:
m = folium.Map([...
1
vote
0answers
32 views
Making polygon for every point in set using voronois?
I'm trying to make polygons from points, were each point will be represented by one polygon. I tried using voronois, but the results are incomplete. While I more or less understand where this ...
1
vote
1answer
25 views
Turn detached coordinate values into linestring in GeoPandas
I have the following dataframe
id x1 y1 x2 y2
0 431634.751688 4.581910e+06 431692.792776 4.581814e+06
1 431930.133825 4.581873e+06 431938....
1
vote
0answers
52 views
GeoPandas transform latitude/longitude coordinates to UTM coordinates
I have a shapefile which I read with GeoPandas, this shapefile has lat/long coordinates and I want to transform it to UTM coordinates.
I tried this:
shapefile = gpd.read_file('example.shp') #CRS = ...
2
votes
0answers
33 views
Add WMS to matplotlib Python
Currently I am adding a basemap from stamen.com to my plots as it is explained here: http://geopandas.org/gallery/plotting_basemap_background.html .
Is it also possible to load a WMS from another ...
0
votes
1answer
23 views
How to apply the orient function on the geometry of a GeoPandas dataframe
Given a GeoDataFrame where the geometry column contains both Polygons and MultiPolygons.
How can I force the orientation (left-hand-rule or right-hand-rule) on these geometries?
3
votes
3answers
82 views
Colorizing polygons based on color values in dataframe column?
I preparing some choropleth election result maps in Geopandas. The assigned color for each electoral district must correspond with the winning party (a color that I pre-determine), and the intensity ...
2
votes
1answer
42 views
Truncating points precision
I have geopandas with CRS in meters (ITM {'init' :'epsg:2039'}).
I converted the geometry from espg:4326 so I have very high precision which I don't require: POINT (177559.4776412862 594546....
1
vote
1answer
75 views
Dataframe of points to PostGIS
I have a csv file with some info and coordinates and I want to create a table in PostGIS with that CSV file. This is what I have so far:
import pandas as pd
import geopandas
from datetime import ...
0
votes
0answers
26 views
Memory usage (or absolute bytesize) of geometry objects(shapely) in a GeoDataFrame in Python?
I am currently working on analyzing data structure and size of a shapefile. To analyze it, I was wondering how much geometry column consumes the size of a shapefile. Unlike other features, geometry(in ...
0
votes
0answers
28 views
Using Single Polygon for entire dataframe in PySAL?
I'm trying to calculate the queen contiguity weights using pysal's queen_from_shapefile() helper method based on this page
Not being a GIS specialist I wanted to check my intuition on this Q&A ...
0
votes
0answers
48 views
Getting more precision with GeoPandas?
Geopandas
Reading a shapefile with GeoPandas and printing its total bounds:
dataframe = gpd.read_file('example.shp')
print(dataframe.total_bounds)
Prints: [ 663590.5817 1541419.8307 724630.0589 ...
2
votes
1answer
59 views
How to dissolve overlapping polygons using GeoPandas
Assuming the following:
from shapely.affinity import translate
from shapely.geometry import Polygon
import geopandas
p0 = Polygon( [(0,0), (2,0), (2,2), (0,2)] )
p1 = translate(p0, xoff=1)
p2 = ...
0
votes
1answer
38 views
geopandas overlapping check
How we can check if feature has intersections or not with other features in one shapefile data, I wanna make sure if in that file there is no overlaps between polygon, I have read this approach "An ...
3
votes
1answer
47 views
GeoPandas not projecting from 4326 to a UTM zone properly?
I am at my wit's end trying to figure out why my data is not being reprojected properly in a geodataframe.
Given this input data, saved in a variable called power_lines:
{'type': 'FeatureCollection',...
2
votes
1answer
74 views
GeoPandas: Get distance from geom in tableA to a geom in tableB that matches attribute from tableA
UPDATE WITH SOLUTION (at bottom)
Using GeoPandas I am trying to identify the distance between an election candidate's home address (Point) and the electoral district they are running in (Polygon). ...
3
votes
1answer
107 views
Convert contours to polygons maintaining attributes using Python?
I have a series of polylines(contours) that i want to convert to polygons using Python (GeoPandas, Fiona, Shapely). Because these are contours, there will be donut polygons, can anyone point me to how ...
2
votes
1answer
52 views
Accessing a ShapeFile with GoogleEarthEngine-API : Invalid GeoJSON geometry
I'm trying to download Sentinel-2 data of my area of interests on Google Earth Engine API for Python.
I'm trying to access my shape file (contains 2 different polygons) on the API. I added the shape ...
1
vote
1answer
64 views
Get UTM zone with GeoPandas from a shapefile
I want to know to which UTM zone belong a shapefile.
With GeoPandas I can read a shapefile and know its EPSG code:
import geopandas as gpd
dataframe = gpd.read_file('shapefile.shp')
print(dataframe....
0
votes
0answers
41 views
Cannot open gdb folder from external drive using geopandas
I am trying to open a .gdb folder from an external drive with geopandas:
import geopandas as gpd
data = gpd.read_file('/Volumes/SSD/data.gdb')
and I am getting the following error:
DriverError: '/...
1
vote
1answer
70 views
Plotting a heat map onto background in python using kde?
I have a geodataframe with points within the united states. Each point has a geometry attribute as well as a value. I would like to plot a heat map based on these values on top the map of the united ...
2
votes
0answers
51 views
GeoPandas spatial join generates error in QGIS 3.8 Python console
I want to execute a spatial join using GeoPandas in the Python console QGIS 3.8 like this:
dfsjoin = gpd.sjoin(point, polygon)
but it doesn't work. It always shows the following error:
Exception ...
0
votes
0answers
22 views
GeoPandas Dissolve splits polygons into parallel strips?
I have polygons that is converted from raster dataset with Raster Pixels to Polygons in QGIS. I would like select some polygons based on the attribute value and merge them using Dissolve function in ...
1
vote
0answers
36 views
Merging adjacent polygons using Geopandas by avoiding filling gaps
I have raster dataset that I would like to convert into vector polygons. Raster to polygon conversion works pretty good. But, having problem when I try to merge adjacent polygons using Dissolve ...
0
votes
1answer
28 views
Getting z coordinates from polygon list of Geodataframe?
I am using Python to solve a problem with many polygons that could be really stressful with other software related to my field (mining), however i havent found a way to extract the Z coordinates from ...
0
votes
2answers
46 views
GeoPandas sjoin with extensive quantities
I have one geodataframe that contains polygons and corresponding land use category (e.g. agricultural, commercial, retail, residential, ...) and another that contains census tract polygons and ...
0
votes
2answers
125 views
GeoPandas: plot two layers but only to the extent of the smaller one
I am using GeoPandas and I want to plot two layers. I want the map to have the extent of the smaller layer. With this code below, the map's size automatically fits the bigger layer.
import geopandas ...
0
votes
1answer
176 views
Length of intersections from a linestring and a grid shapefile by using Python GeoPandas & QGIS
I am using Python GeoPandas and I have two shapefiles. One of them is a grid file containing equal polygons. The other shapefile is a linestring file with several lines and its Attributes.
The idea ...
2
votes
1answer
50 views
'Must have equal len keys and value when setting with an iterable' error message
I have a postgres spatial table that I want to convert to a geopandas GeoDataFrame. In order to do so I wrote the following piece of code:
#'pg_tab_clip' is the name of the postgres spatial table
#'b'...
1
vote
1answer
90 views
Cutting a portion of a satellite image based on coordinates in GDAL?
I have a satellite image of 7-channels (Basically I have seven .tif files, one for each band). And I have a .csv file with coordinates of points-of-interest that are in the region shot by the ...
0
votes
0answers
59 views
Checking for geospatial similarity in Python?
Say I have two pandas dataframes in a format similar to this one where each 'Point' represents a person and where they were at. Assume that there are multiple line strings representing different ...
2
votes
0answers
35 views
Plotting Geopandas Gallery example fails?
I have been having trouble getting the figures from the example provided in Geopandas Gallery examples. When I ran these scripts in Jupyter console:
import geopandas
import geoplot
import matplotlib....
2
votes
1answer
42 views
Retaining last position of vessel position in geodataframe including time series?
I have geodataframe about vessel position which include unique code called 'mmsi' and time series. In the following 'mmsi' column has more than 1 'mmsi' code and time series (* mark).
mmsi ...
3
votes
0answers
44 views
Nearest neighbour joins for two geodataframes using KDtree from scipy/sklearn
I have a number of large geodataframes and want to automate the implementation of a Nearest Neighbour function using a KDtree for more efficient processing. The process I want to achieve here is to ...
0
votes
0answers
33 views
Possible To Add Text Inside Geopandas Bubble Markers?
I've got a chloropleth base map of one variable and then a bubble overlay of another variable. Is it possible to add text within the bubble markers, for say what number is represented by the size of ...
1
vote
1answer
697 views
Error installing GeoPandas?
Can someone help me with this error concerning installation of geopandas even after installing 'shapely'?
Error:
cwd: C:\Users\JASHVA~1\AppData\Local\Temp\pip-install-ccci6ax2\fiona\
...
1
vote
0answers
29 views
Adding distance when buffering point geometry in a geodataframe?
I have 2 geodataframes that I want to combine. They the same fields/columns but different geometries (one is points, one is polygons).To do this I want to buffer the points slightly (like 10m or ...
1
vote
0answers
27 views
Set-overlay collection of polygons on itself [closed]
I have a GeodataFrame in Geopandas, that consists of a number of polygons, each overlapping its neighbors. What I want is to generate every single possible polygon from all the intersections, so that ...
4
votes
1answer
145 views
Center / normalize choropleth colors in GeoPandas
I'm looking to plot a choropleth with a divergent colormap. I need to center the colormap in such a way that the middle color is displayed for a specific value (e.g. 0). How could I do this in ...
0
votes
0answers
54 views
GeoPandas plot choropleth line color
I'm using GeoPandas to create a categorical choropleth of my data. I managed to get the correct colormap applied to the polygon fill but there are tiny slivers between the polygons that I would like ...
