Questions tagged [geopandas]
an open source project to make working with geospatial data in Python easier.
531
questions
2
votes
1answer
444 views
Geopandas read_file only reading first part of KML
I am trying to read the following file with GeoPandas:
import geopandas as gp
gp.io.file.fiona.drvsupport.supported_drivers['KML'] = 'rw'
df = gp.read_file('http://watchthemed.net/index.php/json/...
1
vote
1answer
2k views
AttributeError: 'NoneType' object has no attribute 'bounds'
I have the following geodataframes, corresponding to a regular grid:
id grid_id geometry
0 48 0 (POLYGON ((2.052457758079306 41.42493869117656...
1 49 1 ...
1
vote
1answer
91 views
Why is there a difference in length for two lines created from the same points, one with ArcGIS Pro and the other with Geopandas? [closed]
Update
Question off-topic because I launched the ArcGIS treatment again and for an unknown reason this time I obtained the 21.56km length I was expecting.
It means the error comes from either my ...
0
votes
1answer
337 views
AttributeError: 'Series' object has no attribute 'has_z'
I got the following GeoDataFrame taken from a CSV file and after some slincing and CRS and geometry asignment
ctf_nom geometry id
0 Prunus ...
3
votes
1answer
315 views
Setting CRS : TypeError: 'NoneType' object is not callable [closed]
I'm working with a naive geometry column imported from a csv file, like this:
name geometry id
1 Abubilla (POLYGON ((424405.897979997 ...
2
votes
1answer
661 views
TypeError: Input geometry column must contain valid geometry objects
I'm working in a urban biodiversity project and I have a csv file for a birds inventory with a column index called 'geom' composed by multypolygons as this:
name geom ...
2
votes
1answer
146 views
Why does spatial join on geodataframes return empty result?
I have two geodataframes that I want to perform a spatial join on; one is points, one is polygons. They are both dtype: int64. They both have .crs = {'init': 'epsg:4326'}. I have verified both of them ...
1
vote
1answer
36 views
Why does geodataframe never complete?
I had a feature class made up of 1,700,000 polygons. I used Geopandas to create a geodataframe:
state = "MD"
state_gdb = r"C:\Projects\Pop_Alloc\{}_Data.gdb".format(state)
join_feat = "{}...
2
votes
1answer
349 views
Finding shortest distance from point(s) to number of polygons at varying angles using shapely?
My aim is to calculate the distance a point is from land in Python, trying to replicate the functionality of fetchR.
Given an origin and distance, I create shapely LineStrings which radiate out from ...
1
vote
2answers
71 views
How to create a sub dataframe from a dataframe using specific columns
I have a dataframe that has more fields/columns than I want, so I am trying to create a sub dataframe that only has certain fields/columns. The following throws a
TypeError: '(['uniqueid'], ['...
2
votes
1answer
412 views
How aggregate data in a geodataframe by the geometry in a geoseries
I have a geoseries where each row is a (square) polygon. Housing price data is in a geodataframe where the geometry is a polygon of the zip code.
I need to aggregate the housing price data by squares ...
0
votes
1answer
145 views
GeoPandas intersect not working as expected
Using GeoPandas 0.4.0 with Python 3.5, I'm finding that geopandas.intersects does not behave as I expect it to. For example, a buffer around Switzerland does not appear to intersect with neighbouring ...
0
votes
0answers
121 views
Improving speed of GeoPandas dissolve?
I am trying to dissolve grid spaces by category using GeoPandas' dissolve function, but it doesn't finish after hours of running and I want to make sure I'm not doing something wrong and/or there isn'...
1
vote
1answer
279 views
Error: Input [<shapely.geometry.point.Point>, <shapely.geometry.point.Point>] is the wrong shape for a LineString
I'm trying to create a linestring out of a dataframe of latitudes and longitudes.
geometry = [Point(xy) for xy in zip(linkdf.lon, linkdf.lat)]
linkgdf = GeoDataFrame(linkdf, geometry=geometry)
...
0
votes
0answers
414 views
Can't open shapefile with GeoPandas
I downloaded a shapefile from the Brazilian Institute of Geography and Statistics (IBGE). I can open it on QGIS and work with it perfectly there, but I need to work with it using Python.
I'm trying ...
1
vote
0answers
616 views
Geopandas simplify results in gaps between polygons
The goal is to simplify the geometries of a shapefile containing multipolygons. However, when I use Shapely's simplify in geopandas, the result contains gaps between the polygons. I was hoping that ...
2
votes
1answer
383 views
How to merge geoseries to geodataframe based on geometry attribute
I have 5868 points in a geodataframe with some columns/attributes. Between points which have distance less than 10 m, I just want to select only one point as representation in that area. I have done ...
0
votes
1answer
188 views
Geopandas intersects/contains fails between GeoDataFrames
I am struggling to make the GeoDataFrame functions: intersects/contains work between GeoDataFrames instances.
Let t be a GeoDataFrame with contents:
id ...
4
votes
1answer
722 views
Writing GeoPandas data frame to PostGIS?
Similar question has to this has been asked before Adding GeoPandas Dataframe to PostGIS table?
I have followed the example but I am running into an issue I cannot solve. There is some geometry ...
0
votes
0answers
113 views
Loading spatialite tables into GeoPandas GeoDataFrame
Using information from here, I am trying to load a result of a SQL Python selection into a Geopandas geodataframe. I know pyspatialite is not longer maintained, so have tried using the dbapi2 module ...
4
votes
2answers
228 views
Geopandas and QGIS Calulating Different Polygon Area Values?
I am just trying to understand why Geopandas and QGIS might calculate areas differently despite using exactly the same shapefiles and exactly the same projections.
Both shapefiles are using EPSG:...
0
votes
1answer
214 views
geopandas: “LineStrings must have at least 2 coordinate tuples” when reading gpx files
I am trying to use geopandas to read in some gpx files (generated from a Garmin vista HCX). For many gpx files, given this code:
>>> import geopandas as gpd
>>> data = gpd....
3
votes
1answer
147 views
Read N number of rows from shapefile using GeoPandas
Pandas has a parameter nrows for selecting how many rows will be read into the dataframe.
Does GeoPandas have a similar parameter? Couldn't find in the documentation.
0
votes
1answer
214 views
Reading in AW3D30 GeoTIFF files and processing them in Python?
I am new to GIS processing, and I am using Python 3.6 to do so.
My current task is to read in several files of geographic data (specifically tiles of elevation data from JAXA), combine them for my ...
1
vote
1answer
763 views
Performing sjoin on polygons and lines without intersection using GeoPandas?
I want to join a GeoDataFrame with Polygons (circular, were created from Points with buffer) with a GeoDataFrame that has Linestrings.
These polygons and lines do not necessarily intersect nor ...
0
votes
1answer
268 views
Testing intersection between shapely object and geopandas GeoSeries?
This is a Python question, involving geopandas and the libraries it calls, primarily pandas and shapely.
tl;dr:
I am trying to run a test using
if foo.intersects(bar): and am repeatedly getting one ...
3
votes
1answer
167 views
Re-project GeoJSON from pixel-space to lat-long in Python
I have created a GeoJSON of linestrings in pixel space using Python. However, I now need to re-project the file to match the same projections and extent of the .tiff file I wish to layer the GeoJSON ...
1
vote
1answer
200 views
GeoPandas does not identify points inside polygon
I am trying to intersect some points with a polygon in GeoPandas.
First I create a Point GeoDataFrame from a text file.
import geopandas as gp
import numpy as np
import pandas as pd
from shapely....
0
votes
0answers
70 views
Opening geodata in GeoPandas?
I've downloaded some geodata but I'm unable to import it into GeoPandas.
This is a sample of the geodata (I've trimmed the JSON object):
{'displayFieldName': 'NAME',
'fieldAliases': {},
'...
4
votes
1answer
816 views
Rasterizing polygon grid in Python (geopandas & rasterio)
I am trying to rasterize a custom polygon grid with one or more columns. Preferably I'd like to create multi-band rasters from multiple GeoDataFrame columns (in polygon grid), but I have got stuck ...
0
votes
0answers
265 views
TypeError: object of type 'Polygon' has no len() - When trying to plot from a Dataframe
I need to create a LISA map for my work, and I am having problem when I'm trying to plot using geopandas.
My data sources are:
map_df # A Dataframe
A geopandas series :
hh = map_df.loc[(map_df['...
1
vote
0answers
650 views
Changing CRS of geometry in geopandas dataframe efficiently?
I have a shapefile which I am converting into a geopandas dataframe. The CRS of this shapefile is epsg:4326 and I want to convert this to epsg:3857.
import geopandas as gp
file_path = 'zip_poly.shp'
...
3
votes
1answer
162 views
Changing CRS in GeoPandas?
I'm trying to plot a bunch of points on a map of Britain and Ireland, and I've been using GeoPandas for that.
I've basically just been following the tutorials to do that, and slicing a world map with ...
0
votes
0answers
303 views
Geopandas ImportError: DLL load failed (in pyviz tutorial geographic data examples) win7
I'm trying to run the geographic data examples from pyviz tutorial. I'm getting the error list in modules below. My Geopandas module work fine (and the others dependent modules) with 3.5 python ...
0
votes
2answers
189 views
Fiona and Geopandas not applying CRS to shapefile during creation
I'm trying to create a shapefile of points from a coordinate list. But, when I use fiona to create the shapefile Arc Catalog is showing that there is no CRS. I tried to add the CRS with Geopandas and ...
2
votes
2answers
469 views
Rounding coordinates to 5 decimals in GeoPandas?
I have a shapefile, which I converted into geopandas dataframe. I would like to round the coordinates to 5 decimals.
Is there a method/function in geopandas that can do this?
My shapefile contains ...
2
votes
0answers
221 views
Python Geopandas reading shapefile taking too long [closed]
I'm relatively new to Python and GIS.
I am attempting to read in a 1.1 GB shapefile using geopandas. I let the code run for an hour and it is still not complete. Is this normal? How can I optimize ...
7
votes
1answer
1k views
Remove empty geometries from geodataframe
Since geopandas can't perform overlay/intersection with lines, I found a workaround:
import geopandas as gpd
import fiona
from shapely.geometry import shape, MultiPolygon, LineString, MultiLineString
...
6
votes
1answer
1k views
Iterating features and buffering using GeoPandas?
I have a shapefile with many large polygons and would like to process each polygon individually because spatial operations on the entire dataset are too big for memory. For instance, iterate shapefile,...
2
votes
2answers
460 views
Plotting lon/lat point (without manual conversion) on XY map using GeoPandas?
I am data scientist not experienced in GIS and need to do some simple map plotting of the Netherlands. Using Geopandas everything works out nice and dandy for my purposes however I am stuck on 1 ...
2
votes
0answers
298 views
Intersecting shapefile/GeoDataFrame using Geopandas, shapely etc?
I'm currently transferring from ESRI to open source GIS by recreating basic ArcGIS tasks in Python, mainly using Geopandas since I have some experience with Pandas.
Now I'm trying to intersect a ...
4
votes
1answer
275 views
Making Shapely box larger using GeoPandas?
I'm creating a box that covers the the area of a GeoPandas GeoDataFrame,
so that I can use it as an inverted map to later cover up unwanted spill-over data.
import geopandas as gpd
import geoplot as ...
1
vote
1answer
569 views
Multiple shapefiles to one GeoPandas GeoDataFrame
I'm trying to vertically concatenate multiple shapefiles that reside in one directory, into one geodataframe. They all have the same table schema and same CRS. I am trying to use the code from this ...
3
votes
1answer
540 views
geopandas.intersects() over each row
In trying to answer Writing selected features to shapefile using OGR and Python? I ran into problems with geopandas.GeoSeries intersects methods.
I have the following line and polygon:
import pandas ...
2
votes
2answers
745 views
How to extract biggest Polygon from MultiPolygon in GeoPandas?
Given a Shapely MultiPolygon, how can I extract the biggest Polygon?
For example, given a MultiPolygon as follows:
from shapely.geometry import Polygon, MultiPolygon
multipolygon = MultiPolygon([...
0
votes
2answers
458 views
How to inverse the orientation of the holes coordinates of a polygon in geopandas
I have a polygon shapefile which I am reading with geopandas. The polygon contains holes. My purpose is to add a random point inside each hole.
In order to create the points inside the holes (...
0
votes
1answer
254 views
Equivalent method for .withcolumn() for geodataframe
I am trying to use a user-defined function in pyspark in order to check whether the points in CANmep_GDF lie within the polygons in gda_GDF.
from geopandas import GeoDataFrame
def check_exist(geom):...
0
votes
1answer
687 views
Smoothing shapefiles using Python
The purple is the original polygon to be smoothed and I would like to smooth the polygons as the red line using Python.
I tried simplify but looks like I need a buffer and simplify the buffer. But I ...
0
votes
0answers
56 views
Locating observations that lies within a collection of Polygons (Python)
I'm trying to locate the observations that lie within a collection of Polygons but my current implementation takes forever, and I suspect that it is because the 'within' method needs to check all ...
0
votes
0answers
65 views
How to preserve the Multiploygons using Python?
I converted my input file with geometry Polygon 25D to an output file with geometry Polygon using the below code.
As you can see the below image. Problem is that the holes in the polygon is vanished ...
