Questions tagged [geodataframe]
is a pandas.DataFrame that has a column with geometry
94
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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
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1
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29
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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, ...
- 103
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2
answers
57
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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. ...
- 103
1
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63
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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 ...
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57
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Clipping NetCDF files with a geodataframe in Python
I have monthly estimates of PM 2.5 for 20 consecutive years stored in NetCDF files with a precision of 0.01°x0.01° (i.e. for each 0.01°x0.01° square on the world map, there is an estimate of PM 2.5). [...
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1
answer
62
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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.
...
1
vote
2
answers
317
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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, ...
- 1,057
6
votes
3
answers
558
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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...
...
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2
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1
answer
66
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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 ...
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1
answer
65
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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
327
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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....
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1
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1
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115
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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'...
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2
answers
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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 ...
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0
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76
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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 ...
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137
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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 ...
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2
votes
2
answers
578
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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 ...
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2
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1
answer
253
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['...
- 592
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1
answer
785
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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 ...
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1
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409
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Convert JSON to GeoDataFrame and append both geometry and filename
I am currently running an experiment on automating a task by merging information from various file types and doing a number of operations to achieve this.
Currently, I am reading a list of GeoJSONs ...
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2
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1
answer
510
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Getting the percentage of how much areas intersects with another using GeoPandas
I have two GeoPandas dataframes, namely:
grid - the base map that contains a grid of 100x100 meter squares.
land - the land use of an area (e.g. farmland, meadow, etc.).
How do I, upon spatially ...
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1
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219
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Can GeoPandas accept lists as property values?
Properties in GeoJSON features can be lists (or "arrays" in Javascript). For example, the following GeoJSON feature is formatted correctly, and includes a values property that is a list:
{
...
- 113
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1
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177
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Create a function that will return geodataframe
I have created the following function to take Origin = str, Destination = str, line = shapely.geometry.linestring.LineString, node = GeoDataFrame
def create_lines_df(Origin, Destination, line_, nodes_)...
2
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1
answer
683
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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...
...
3
votes
1
answer
272
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Displaying polygon on top of DEM with GeoPandas and Rasterio
I have a DEM and a polygon, both in the NAD83 Datum. I need to plot both at the same time.
Plotting the polygon
import os
import rasterio
import geopandas as gpd
import contextily as cx
import ...
- 1,169
1
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0
answers
193
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Buffer not working in GeoPandas
This seems pretty simple but I can't seem to create a buffer around a GeoDataFrame. I'm making this buffer so that it will be the extent of the axes instead of the original layer. This is to make the ...
- 1,169
1
vote
1
answer
324
views
Get the sum of an attribute within a set radius for each row using GeoPandas
I have grid map that contains cells. Each cell is represented as a row in the dataframe, and each row contains the average population "pop" attribute.
What I need is that for each of these ...
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votes
2
answers
1k
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Filtering GeoDataFrame rows with list of strings in GeoPandas
I want to filter GeoPandas GeoDataFrame rows by a list containing 4 'matches';
list_of_names = ['BE36_1000_1349', 'BE36_1000_1350', 'BE36_1000_1449', 'BE36_1000_1450'].
I want to return four complete ...
- 315
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0
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58
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Iterating over two very large dataframes: finding the closest LineString (1/150k) to a Point (1/1.2m)
I have a dataset of calls (1.2m rows), each with a 'Point' geometry. Likewise I have a street dataset (150k rows), each with a LineString geometry. My goal is to identify, for each call, the closest ...
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1
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1k
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Finding if point is in polygon then taking attribute from polygon dataframe and inserting it as a column in the point dataframe
I'm doing some GIS analysis in Python for COVID work. I've geocoded our entire membership (gdf_schoolAgedChildren) base and captured their locations in a shapely point data type (for each member). I'...
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1
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120
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Getting median value of attribute for duplicate polygons and dropping duplicates using GeoPandas
I have a DataFrame that resulted from spatially joining a digital elevation map with a square grid map.
This unexpectedly resulted in duplicate rows where two rows will have the same "geometry&...
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2
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0
answers
2k
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AttributeError when setting coordinate system with set_crs() in GeoPandas [closed]
I'm trying to set the coordinate reference system for a GeoDataFrame using the following code:
import geopandas
from shapely.geometry import shape
from shapely.geometry import Point
d = {'col1': ['...
- 31
3
votes
2
answers
255
views
Getting polygon with max attribute within polygons with same geometry using GeoPandas
I have a GeoDataframe containing the spatially joined result of a square grid map and flood hazard data. However, there are instances of rows with the same "geometry" but differing "...
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3
votes
1
answer
2k
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Pandas DataFrame to GeoDataFrame with Polygon geometry using groupby and lambda
I have a pandas DataFrame like this
name loc_x loc_y grp_name
a1 1.0 2.0 set1
a2 2.0 3.0 set1
a3 3.2 4.1 set2
a4 7.9 4.2 ...
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4
votes
1
answer
623
views
How does GeoPandas' representative_point() work?
I need to compute points that, unlike centroids, are assured to be within a geometry. GeoPandas offers the method geopandas.GeoDataFrame.representative_point(), but I cannot find how it works. ...
- 197
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0
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409
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Adding a new point to a graph in NetworkX
I am working with some points between which I need to find the shortest paths along a graph in NetworkX. I'm trying to take a point that is currently not on the graph and connect it to the graph, i.e.,...
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1
answer
89
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Error when creating geodataframe from lists [geographic coordinates and GRIB CRS]
I'm working with meteorological data and I want to insert the grid points and also their polygon in a GeoDataFrame.
They are generated by ERA5 and in a GRIB format.
When I try to create the ...
- 3
2
votes
1
answer
3k
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How to get lat and lon from a GeoPandas geodataframe polygon
I am looking to get the lat and lon coordinates for a number of different polygons in a geodataframe. The following code was suggested on another answer but this returns non lat and lon numbers (lon = ...
- 31
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0
answers
70
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Rasterize multiple polygons and calculate average
I have a vector layer that contains many overlapping polygons, each containing a "Value" in the attribute table. I am trying to rasterize each polygon as an individual raster layer, and then ...
1
vote
1
answer
548
views
How to make necessary changes to Geodataframe to export as geopackage or shapefile
I am trying to export a geodatabase I created via the OMSNX package. ()
When I attempt to convert the file from a geodatabase to shapefile I get an error "ValueError: Invalid field type <class ...
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2
votes
1
answer
1k
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Plotting multiple maps using GeoPandas
I have two GeoDataFrames. The first one have the administrative boundaries of the 25 regions of a country. The second one, the urban fabric of the same country.
regions.head()
COD NAMEREG ...
- 59
0
votes
1
answer
224
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Python convert GeoDataFrame to shapefile using ogr2ogr, unable to open error
I have a GeoDataFrame that I am trying to save as a shapefile using ogr2ogr. Based on the Q&A for Use GeoDataFrame as a osgeo.ogr DataSource and Using geopandas GeoDataFrame in gdal.Grid for ...
- 911
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0
answers
865
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ValueError: 'ITEM' is both an index level and a column label, which is ambiguous
I'm trying to process some data, with geopandas0.9.
Here is my code:
locations = select_polygons.groupby(class_col).apply(lambda x: \
sample_locations_from_polygon(x, sample_on_boundary='...
- 103
3
votes
1
answer
640
views
Exporting multiple GeoPandas GeoDataFrames to one KMZ file
I have two GeoPandas GeoDataFrames, and I want to export them to a KMZ file with a nested folder structure. Below is a stand-alone code to create the GeoDataFrames, and a screenshot of how I would ...
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votes
1
answer
2k
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Creating LINESTRING from two POINT(s) and finding mid-POINT
I would like to create a LINESTRING from two POINT geometries and then determine the mid-POINT. So, from my original Pandas' DataFrame, with "x" and "y" columns, I created the ...
0
votes
1
answer
622
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Attempting to get index value of Geopandas dataframes in list produces ValueError
When looping through a list of Geopandas geodataframes and attempting to get the index value of the current dataframe in the loop, I'm getting ValueError: Can only compare identically-labeled ...
- 1,060
4
votes
1
answer
80
views
Defining coordinate system for every GeoDataFrame (shapefile) in list
I am looking to set a coordinate system for every GeoDataFrame in a list of them. So I need this:
gdfs[0].crs = "EPSG:6668"
gdfs[1].crs = "EPSG:6668"
And so on but iteratively. I ...
- 412
10
votes
1
answer
5k
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Shapely coordinate sequence to GeoDataFrame
Using the shapely bounding box function box, and a GeoDataFrameof points, I have extracted a bounding box and created a buffer around it (below gdf is a GeoDataFrameof points):
bbox=shapely.geometry....
- 1,545
3
votes
1
answer
183
views
Save geodataframes from list to separate shapefiles
I have a list of geodataframes which I imported from a folder full of shapefiles:
import glob
import geopandas as gpd
shapefiles = glob.iglob('E:/folder/shapefiles/*.shp')
gdfs = [gpd.read_file(file) ...
- 412
-2
votes
1
answer
186
views
How to change column value by matching row value in data frame?
Say I do have the following table
| longitude | latitude | temperature | label |
|-----------|----------|-------------|-------|
| x | y | z | 1 |
| p | q | ...
- 11
0
votes
1
answer
1k
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Error saving geodaframe to shp: AttributeError: 'Series' object has no attribute 'to_file'
I have been struggling with a problem related to Getting AttributeError: 'DataFrame' object has no attribute 'to_file' from GeoPandas even though file converted into GeoDataframe ...