Questions tagged [geodataframe]
is a pandas.DataFrame that has a column with geometry
126
questions
0
votes
0
answers
41
views
Reading shapefiles: Can only read the geometry
I have a function which reads various shapefiles as follows:
def read_gdf(file:str,crs:str,current_crs:str)->gpd.GeoDataFrame:
collection = list(fiona.open(file,'r', encoding='iso-8859-1')...
- 475
0
votes
0
answers
33
views
Intersection of polygons [duplicate]
I have a brown polygon which intersects two purple polygons:
I d like to make sure that the brown polygon (64981Cas) is allocated to the purple polygon with the highest intersection area (the polygon ...
- 475
0
votes
0
answers
36
views
Getting an empty Python geodataframe while I perform spatial join operation on - polyline/line and points
import os
os.environ['USE_PYGEOS'] = '0'
import geopandas as gpd
sv=gpd.read_file(r"D:\Sampledata\Kerala\Schools.shp")
sr=gpd.read_file(r"D:\Map\Kerala\Road_line.shp")
gh=gpd.sjoin(...
- 29
0
votes
1
answer
54
views
Why the buffer geometry column in the GeoDataFrame is in point form although it's actually in polygon form?
I wanted to create a 1.5km buffer for each geocoded point. Here's the screenshot of the geocoded points dataframe.
So I overwrote the geometry column using the code below:
shopping_centres['geom'] = ...
- 47
0
votes
1
answer
58
views
How do I create a Geodataframe which the data is grouped by User ID & the timestamp is sorted from oldest to most recent?
I've been struggling to complete this exercise (Exercise 2 Problem 3) which you guys can refer to this link. A reminder that the kruger_points.shp is obtained from Exercise 2 Problem 2. Here's the ...
- 47
1
vote
1
answer
77
views
Intersection between polygons. Is gpd.sjoin adjustable?
I am looking to intersect two polygons. See picture below:
The intersection is between the pink polygon (the small one) and the purple polygon (the bigger one). My issue is when I do the intersection ...
- 475
3
votes
1
answer
56
views
Incompatible numeric format between points and polygons geometry in GeoPandas
I am reproducing an exercise on GeoPandas. Basically, I want to check whether points are within a given polygon. However, polygon format numbers are quite different. They seem huge (possibly because ...
2
votes
0
answers
53
views
Handling Nulls with QgsVectorLayer.getFeatures() and GeoDataFrame.from_features()
I am trying to convert selected features in a QgsVectorLayer to a GeoDataFrame. The input layer contains values including nulls across multiple floating, integer or string columns.
For Example:
When ...
- 156
2
votes
2
answers
180
views
Removing polygons from GeoDataFrame which do not intersect with any polygons of other GeoDataFrame using Python
I am looking for an efficient way to remove any polygons from a GeoDataFrame which do not intersect with any polygons of another GeoDataFrame. I tried it the following way which seems really ...
- 23
2
votes
1
answer
146
views
Converting input polygon to GeoDataFrame in Python
I am in the process of developing a plugin for QGIS and I need to convert an input vector layer (containing a polygon) into GeoDataFrame. The input layer is imported like this:
input_Area = self.dlg....
- 71
0
votes
0
answers
172
views
Creating a GeoPandas dataframe from GeoDjango query, then extracting latitude values for Plotly
I am attempting to use information from my PostGis database with my Django application to make a 3d scatter in Plotly. I have timeseries data in my database with different metrics from vehicles, and ...
0
votes
0
answers
78
views
Plotting geodataframe with holoviews
I have a geopandas data frame combined_gdf that consists of circular polygons like below.
fid Plot_name Registered Longitude Latitude geometry
0 130.0 2014-10-29 1 -51.460000 -1.740000 ...
- 894
1
vote
1
answer
502
views
Reading single feature as dict into GeoDataFrame with GeoPandas
I have a Leaflet map where a user can select a feature and be able to download some data for that feature. I'm getting the object like this to pass to Python:
data = {
"type": "...
- 571
0
votes
2
answers
96
views
Looping through folders to read shapefiles [closed]
I would like to adapt a function, that reads many shapefiles in one specific folder, to read many shapefiles in many folders.
Here is the function that reads multiple shapefiles in ONE folder.
def ...
- 475
2
votes
1
answer
67
views
Why the extents of GeoDataFrame and masked file are different?
vector = some shape file, MultiPolygon in GeoDataFrame. File crs and vector crs are the same.
vector.geometry
0 MULTIPOLYGON (((47.59780 -19.38530, 47.59330 -...
Name: geometry, dtype: geometry
...
- 33
0
votes
0
answers
47
views
Spatial join of multiple GDFs and extract values
I have several different polygon geodataframes:
I would like to get the interseting area of one to another. I was able to do it like that:
frames = [oranzove, modre, cervene, tyrkysove]
empty = []
...
- 121
3
votes
1
answer
676
views
Concatenating two geodataframes needs CRS Adjustment
I have two geodataframes which I would like to concatenate. I have tried this:
test=gpd.GeoDataFrame( pd.concat( [gdf1, gdf2], ignore_index=True) )
where print(gdf1.columns) and print(gdf2.columns) ...
- 475
1
vote
1
answer
329
views
Selecting and removing polygons that overlap within a single GeoDataFrame in Python
I have a GeoDataFrame made of polygons- some overlapping, some not (see picture above). I'd like to create a shapefile or GeoPackage of only the polygon centroids that are not overlapping. There is a ...
- 221
4
votes
1
answer
150
views
Computing parallel polygons based on given perpendicular distance in GeoPandas
Say I have a GeoPandas GeoDataFrame of polygons (i.e. the "geometry" column contains polygons of GPS coordinates only).
import geopandas as gpd
from shapely.geometry import Polygon
...
- 141
1
vote
0
answers
220
views
geopandas.sjoin : Does the size of the polygon matters?
I am doing a spatial join with geopandas as follows:
joinIlots = gpd.sjoin(left_df=Area, right_df=data, how="left", predicate="intersects")
The geodataframe data represents ...
- 475
1
vote
2
answers
1k
views
Get the name of the geometry column(s) of a GeoDataFrame
Sometime, the name of the geometry column of a GeoDataFrame is simply not 'geometry' but a custom name which in some situations cannot be known in advance because it may have been defined dynamically ...
- 10.3k
1
vote
1
answer
582
views
(Geo)DataFrame left join leads to NaN in all right values
Let these two CSV files on the disk:
$ cat /path/to/gdf0.csv
myid,geometry
332,"MULTIPOLYGON Z (((0 0 0, 0 0 1, 0 1 1, 0 0 0)))"
220,"MULTIPOLYGON Z (((1 1 1, 1 1 2, 1 2 2, 1 1 1)))&...
- 10.3k
1
vote
1
answer
869
views
Loading back a dumped GeoDataFrame leads to: `GeoDataFrame does not support multiple columns using the geometry column name 'geometry'.`
Let the following file be the result of a GeoDataFrame dump to a CSV file: gdf.to_csv('/path/to/gdf.csv')
$ cat '/path/to/gdf.csv'
myid,geometry
332,"MULTIPOLYGON Z (((0 0 0, 0 0 1, 0 1 1, 0 0 0)...
- 10.3k
2
votes
1
answer
991
views
GeoPandas .set_geometry() does not update Geometry of GeoDataFrame
I'm trying to implement a transformation of x and y coordinates for line features of a Shapefile. geopandas.set_geometry() isn't setting the x and y coordinates and isn't giving me any errors.
Here is ...
- 390
3
votes
2
answers
1k
views
Creating GeoJSON from GeoDataFrame with feature IDs but without bbox using GeoPandas
Here is the creation of an example GeoDataFrame, gdf:
import shapely.wkt
import geopandas as gpd
s0 = shapely.wkt.loads("POINT(0 0)")
s1 = shapely.wkt.loads("POINT(1 1)")
gdf = ...
- 2,204
0
votes
1
answer
292
views
Reading multiple shapefiles and getting error 'A LinearRing must have at least 3 coordinate tuples'
I am reading multiple shapefiles (around 14) using the function below:
def import_shapes_list(path_to_data:str,shapes_folder:str,crs:str) ->gpd.GeoDataFrame:
"""
""&...
- 475
2
votes
2
answers
365
views
How to read geoDataFrame into GDAL function?
I would like to use gdal function in python to convert vector file with polygons to raster (example below). As an input vector data I need to use geoDataFrame (geopandas). Is there a way to read ...
- 51
2
votes
1
answer
321
views
Applying cross join or cartesian product (database table join) for GeoDataFrames using GeoPandas [closed]
I have a set of points and I want to calculate the distance from each point to all other points in GeoDataFrame.
This is my GeoDataFrame:
id Longitude Latitude geometry
0 1 -71.275580 ...
- 719
5
votes
2
answers
4k
views
Intersection of two GeoPandas Dataframes
I have two GeoPandas dataframes titre_polyG and df which I have intersected as follows:
titre_polyG is as follows:
0 MULTIPOLYGON (((-7.64026 33.59134, -7.63996 33...
1 MULTIPOLYGON (((-7....
- 475
4
votes
1
answer
3k
views
Using sjoin in GeoPandas
I have a GeoDataFrame with 12.431 observations of geographical units, called "cities". I also have another layer file with points, called "points". Both of them are in CRS: ...
- 546
1
vote
1
answer
46
views
ValueError when selecting raster files that overlap an AOI using GeoPandas
I want to select only the raster files that overlap or intersect my AOI. I have a list of 900 raster files, and I calculate their footprints. Besides, I have my AOI.
Both, the footprints and the AOI ...
1
vote
1
answer
319
views
Loop through geodataframe, append 0 values between 2001-2021
I have produced a GeoPandas geodataframe (attached) with rows containing "loss_year" between 2001 and 2021, and some area values (pictured).
I wish to append the omitted years between 2001 -...
- 199
1
vote
1
answer
1k
views
Intersect/overlay multiple geodataframes from list using python (geopandas)
I am trying to overlay multiple gdf from list at once.
I have tried this code:
GDF_list = [gdf_1, gdf_2, gdf_3, gdf_4]
for DVP in GDF_list:
DVP = gpd.overlay(gdf, GDF_list, how='intersection')
...
- 121
0
votes
1
answer
107
views
Add raster pixel information to existing geodataframe, one column per band
I have a land cover dataset (a geopandas.GeoDataFrame) with a series of "buffers" over a territory.
The dataset has roughly this format:
unit_id , ..., geometry,
30 ...
- 101
0
votes
1
answer
296
views
Geodataframe to SHP in loop and name of the GDF
I am trying to export multiple gdf to shp and name these shp by the gdf name.
I have found this solution
here is my list:
maloobchod_list = [maloobchod2006_geom, maloobchod2011_geom, ...
- 121
0
votes
2
answers
190
views
Clip data using GeoPandas or PostGIS [closed]
I have two geodataframes - points. First gdf contains smaller number of points. I am trying to clip my second gdf (with higher number of points and therefore bigger area) to the extent of first gdf. ...
- 121
2
votes
0
answers
492
views
Why will Geopandas not read geopackage into dataframe? [closed]
I am trying to read in a geopackage as a dataframe using Geopandas. I am using Python 3.8, Geopandas 0.10.2, and Fiona 1.8.20. The geopackage I was using to test this is publicly available in any of ...
- 1,903
3
votes
1
answer
221
views
Preserving None values in GeoPandas when dissolving (by="id", aggfunc="first", as_index=False)
If I dissolve two geometries with the same id and tell to aggregate the other attributes from the first geometry, I get the attributes values from the second geometry because the first is None.
...
2
votes
2
answers
2k
views
Writing empty GeoDataFrame to shapefile using Python
I don't know why this is so hard to find or to do, but how does one create an empty .shp with geopandas?
I essentially want to duplicate the processes of creating a type: polygon shapefile from QGIS, ...
- 1,350
6
votes
3
answers
4k
views
Extracting latitude and longitude pairs as list from LineString in GeoPandas
I have a GeoPandas GeoDataFrame that looks like this:
shape_id geometry
1000252 LINESTRING (4.91790 52.34725, 4.91797 52.34715...
1000254 LINESTRING (4.80382 52.34495, 4.80413 52.34500...
...
- 185
2
votes
1
answer
378
views
Converting QGIS feature selection into dataframe to allow plotting
I have a layer containing thousands of points of X,Y,Z data (sample below).
fid field_1 field_2 field_3
1 525146 675224 -342.1
2 525148 675224 -342.2
3 525150 675224 -342.1
4 525152 ...
- 455
4
votes
1
answer
272
views
Unable to execute spatial join after CRS transformation in GeoPandas
I'm trying to join a points GeoPandas GeoDataFrame with a polygon GeoDataFrame, but I'm getting an empty results (inner join).
The points GeoDataFrame
I'm loading it by using latitude and longitude. ...
4
votes
2
answers
2k
views
Reading Inspire XML with GeoPandas
I am trying to plot the German Railway net from here, using GeoPandas. It downloads an Inspire XML file. gpd.read_file only seems to read the header. Importing it as a Pandas Dataframe with pd....
- 75
1
vote
1
answer
677
views
Encoding issue while making GeoDataFrame from shapefile using URL
The dataset I want to use have some special characters like ü, õ, ö, ä. which cause encoding issue.
The below example runs totally fine and doesnt mess up those characters.
gdf_local = gpd.read_file(r'...
4
votes
2
answers
11k
views
Using Shapely methods (explain_validity and make_valid) on shapefile
I'm trying to find and repair invalidity in my polygons. I have already found out that 10 polygons have self-intersection problems in QGIS, trying the same thing with shapely.
This is my code:
import ...
- 63
0
votes
0
answers
257
views
Applying functools.reduce to make Geopandas geometries valid for unary_union
I want to calculate the total area of a GeoDataFrame, year_df, where the geometries overlap so I need to take the union. I was running into an issue with unary_union (some TopologyException that the ...
- 13
0
votes
0
answers
694
views
A faster way to extract geometry xy of geodataframe
I need a faster way to extract geometry xy of a large dataset which is in a geodataframe format.
I have developed a lambda function as below to do that but I need a faster way.
The following is a ...
- 191
4
votes
2
answers
4k
views
Check if geometry field in GeoPandas geodataframe have any row with specific type
This question is related to: Filtering by geometry type in GeoPandas
I need to check if my geodataframe contains 'MultiPolygon' type.
Below is my attempt, but it doesn't work. According to ...
- 145
2
votes
1
answer
706
views
Fill NaN geometries records with other geometric column
I have a GeoDataFrame with two geometry columns.
I want to fill missing values of the one with the other.
Both columns contain polygons or multipolygons.
I have tried:
geo_df['geom_2'].fillna(geo_df['...
- 677
3
votes
1
answer
4k
views
Using multiple predicate parameters on sjoin in GeoPandas
Looking for a way to run GeoDataFrame.sjoin() with more than one predicate.
For example, on QGIS' "Join by location" tool, there is a check box of predicates to mark as needed.
When trying ...
- 677