Questions tagged [geopandas]

an open source project to make working with geospatial data in Python easier.

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votes
1answer
111 views

Count Lat Lon Data Points Lying Between 2 Azimuths

I need to count the number of points (LAT, LON) from a cvs file that exist inside an arc defined by 2 azimuths. Ultimately it will need to be iterative where the arc defined by the 2 azimuths rotates ...
6
votes
1answer
1k views

GeoPandas GeoDataFrame plot statistics - how?

The plot method of a GeoPandas GeoDataFrame overrides the DataFrame parent method to plot the geometries of the associated GeoSeries. This is very convenient, but I'd also like to use the easy ways ...
4
votes
1answer
1k views

Finding problematic rows - spatial join in GeoPandas?

I have an sjoin function from geopandas that is behaving erratically: it works on some version of the "points" geodataframe but not others. merged=sjoin(points,polygons, how='left',op='within') The ...
5
votes
1answer
1k views

Geopandas and Zonal Statistic error

I'm trying to use Geopandas and zonal statistic from rasterstats together. I run this code import geopandas as gpd from rasterstats import zonal_stats geodf = gpd.read_file("SHP/shape.shp") ...
13
votes
3answers
7k views

geopandas spatial join extremely slow

I am using the code below to find a country (and sometimes state) for millions of GPS points. The code currently takes about one second per point, which is incredibly slow. The shapefile is 6 MB. I ...
2
votes
2answers
2k views

geopandas error “minimums more than maximums”

I posted this question on stackoverflow here, but it seems that gis.stackexchange is the more appropriate platform. I am trying to merge two geodataframes in geopandas (want to see which polygon each ...
43
votes
2answers
43k views

Convert a pandas DataFrame to a GeoDataFrame

This seems like a simple enough question, but I can't figure out how to convert a pandas DataFrame to a GeoDataFrame for a spatial join. Here is an example of what my data looks like using df.head(): ...
3
votes
1answer
2k views

Calculating distances with lat/long in decimals and WGS 84

I need to calculate the distance between points of two different datasets, once with locations of towns, the other with locations of dams. Both are located in different countries in Africa. The more ...
3
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0answers
2k views

Folium heatmap not displaying

I have an output file data.json [{"5403": 2, "9734": 1, "2565": 5, "5087": 2, "9061": 1, "1761": 4, "4811": 7 "1111": 5, "3891": 3, "1962": 3}] and a shapefile converted to geojson https://www....
8
votes
5answers
18k views

GeoPandas: return lat and long of a centroid point

I would like to return the lat and lon or x and y from the point object in the following series as I plan to link them with an API I built that links OSM and NetworkX. The centroids will be added as ...
13
votes
3answers
9k views

What units are used by GeoPandas/Shapely area and distance functions?

it looks like a silly question, yet I can't find clear answer on that: what units geopandas/shapely use calculating distance/area between objects?
13
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1answer
1k views

Counting features into intersections of Shapely Polygons

I have a geopandas GeoDataFrame containing hundreds of shapely Polygon and MultiPolygon geometries. The polygons overlap in lots of places. I'd like to make a new geometry that contains a count of how ...
15
votes
2answers
11k views

Joining (concat) list of similar dataframes in geopandas?

I have a list of dataframes, all of the same structure and all are polygons. How can I add them all together using geopandas?
7
votes
1answer
6k views

geopandas: can't save geojson

My task is to upload geojson, add data from corresponding csv, drop some columns, then save it back to geojson. However, after I did everything, added csv data (gj.join(df) ), etc, I can't save it ...
0
votes
0answers
447 views

Find pairs of near features with geopandas, fiona, GDAL etc

I have a feature class of points, a few thousands I have now, but I expect to deal with hundreds of thousands of points. I would like find pair of points that is within a specific distance. The ...
2
votes
0answers
2k views

GeoPandas save to shapefile issue: Unable to open EPSG support file

When I try to use to_file() to write a GeoPandas GeoDataFrame to a shapefile I get the following error. df3.to_file('~/Desktop/testout.shp', driver = 'ESRI Shapefile'); ERROR:Fiona:OGR Error 4: ...
0
votes
1answer
932 views

ImportError with GeoDataFrame.from_file(..) shapefile load - Fiona issue

I've installed Geopandas and its dependencies. An ImportError results in Fiona's ogrext.so lookup of "_CPLSetThreadLocalConfigOption": Code executed: boros = GeoDataFrame.from_file("./data/...
5
votes
1answer
7k views

Changing colours in GeoPandas?

I have a very simple map (http://www.nyc.gov/html/dcp/download/bytes/nybb_15b.zip) and I have never before worked with shapefiles in any way. Can someone tell me what I need to do in order to change ...
10
votes
2answers
10k views

Rasterize a shapefile with Geopandas or fiona - python

I need to rasterize a really simple shapefile a bit like this http://tinyurl.com/odfbanu. Which is just a shapefile coutaining counties in the US.I have seen this previous answer : GDAL RasterizeLayer ...
15
votes
3answers
11k views

Dissolving polygons based on attributes with Python (shapely, fiona)?

I have been trying to create a function that does basically the same thing that the QGIS "dissolve" function. I thought it would be super easy but well apparently not. So from what I have gathered ...
5
votes
2answers
3k views

Geopandas: counting the number of raster pixels within a shapefile polygon

I have a shapefile that I have loaded as a geopandas dataframe, and it has a geometry column containing polygons and multipolygons. My end goal is to do some zonal computations on a GeoTiff raster, ...
5
votes
1answer
3k views

Insert Geopandas GeoDataFrame into Spatialite database

Is it possible to insert a Geopandas GeoDataFrame directly into a Spatialite database with Python so that the geometry column of the GeoDataFrame becomes a proper geometry table in the database which ...
5
votes
1answer
2k views

Speed up row-wise point in polygon with Geopandas

I have a geopandas GeoDataframe which contains some attributes and a geometry column which is filled with shapely Point(lon, lat) objects. Moreover, there is a GeoSeries which is equally indexed as ...
5
votes
2answers
3k views

How to merge polygons using GeoDataFrame?

I would like to merge polygons (parcels) which are inside the white road (which is a hole) -- see the picture. The way I'm doing this is certainly a bad way because later, in my script, I have this ...
1
vote
1answer
547 views

Extract area of polygons inside larger polygon and sum their values to a new column

I have two landcover classifications (as shapefiles) created using eCognition. "Level0 (FID)" consist of larger polygons and "Level1 (FID, ClassName, Area_Pxl)" of smaller polygons within these. I ...
1
vote
3answers
9k views

Only read specific attribute columns of a shapefile with Geopandas / Fiona

Having geopandas installed in my Python environment, I can read a shapefile into a geodataframe with In: import geopandas as gpd myShapefile = gpd.read_file(path_to_my_shapefile) print(myShapefile) ...
2
votes
1answer
4k views

Geopandas/folium map not displaying?

I'm trying to use a combination of geopandas, pandas and folium to create a polygon map that I can embed incorporate into a web page. For some reason, it's not displaying and wonder if anyone can ...
8
votes
4answers
12k views

Handling KML/CSV with geopandas - DriverError: unsupported driver: u'CSV'

I'm trying to import a dataset of UK postcode districts UK postcode districts from Google Fusion tables into geopandas with the aim of splicing it to a dataset of house prices. The problem is that ...
5
votes
1answer
4k views

How do I convert Eastings and Northings projection to WSG84 in geopandas?

I'm very new to projections and struggling to convert a map dataset from OSGB36 (Eastings and Northings) to WGS84 (lat/longs). I've used geopandas to import a shapefile. Now I want to export it as ...
0
votes
1answer
2k views

geopandas error when writing to_file() “ValueError: 'long' is not in list”

I'm having a problem getting the "to_file()" function to work with geopandas import geopandas as gpd f = gpd.read_file('fin.shp') f.to_file('fout.shp') Error Output: ---------------------------...
2
votes
2answers
2k views

How do I load mapinfo mid/mif into geopandas?

I suspect this is a trivial question to answer but how do I load mapinfo mid/mif files into geopandas? While it's trivial to load and manipulate .shp files, I can't work out what code to use: Here's ...
3
votes
2answers
2k views

Folium GeoJSON Overlay Not Appearing

I am in the midst of a task which involves the clustering of assessment neighborhoods into larger neighborhoods (data link). The goal is build these neighborhoods in a manner consistent with major ...
8
votes
1answer
3k views

Sharing a Folium Interactive Map w/ Embedded Markers

I have been experimenting with a few Python packages that have great potential for my dissertation research. Since I use pandas for pretty much everything, geopandas was a natural choice for working ...

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