Questions tagged [matplotlib]
If you are thinking about using this tag then perhaps reconsider whether your question would be better posted to Stack Overflow because "matplotlib is a python 2D plotting library" rather than GIS software.
215
questions
0
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0
answers
6
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QNeat3 Polygons do not finish calculating interpolation
I have been using QGIS for a couple of years and used QNEAT3 for the first time around one year ago. I never had any problem with it but, after some months not using it, I tried to use it again to ...
0
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0
answers
10
views
Barplot with a basemap as a background
I have some data as a pandas DataFrame with values associated with longitude. I have plotted it as stacked bars like this:
A subset of the data as an example via df.to_dict():
{'Commodity driven ...
- 686
1
vote
0
answers
22
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Plot raster in synusoidal projection in python
I want to plot data in a matrix, with two other matrices with coordinates, with a sinusoidal projection, in Python.
I read data and coordinates from HDF5 or NetCDF files in the form of numpy arrays. ...
- 21
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0
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47
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How to get bbox coordinates of text on cartopy map
I'm making a map using cartopy in python and am labeling the countries based on the centroid of the country. However, if a name extends outside of the map's crop I would like to move the label so that ...
- 524
0
votes
1
answer
74
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Adding polygon geometry to numpy array to plot it with background
I'm trying to plot image I treated in dataframes.
I need to add geometry to it in order to plot it with a background.
I should have used GeoPandas and geodataframes in the first place.
I have arrays ...
- 33
1
vote
0
answers
45
views
Control the range with show_hist of rasterio
When I set up the "range" argument, Running this code will have an Error.
Would help me with how to set up the range ?
from rasterio.plot import show_hist
a =src.read(1)
show_hist(a, bins=...
0
votes
0
answers
28
views
Semi-Automatic Classification Plugin: Matplotlib error
I recently installed QGIS 3.22 in my MacOS system. But when I installed "Semi-Automatic Classification Plugin", this error occured:
Semi-Automatic Classification Plugin: Error. Check Python ...
0
votes
1
answer
86
views
Estimated Min Max values of ERA5 data
I am working with u and v component of wind on earth engine (ERA5) dataset hourly aggregates as well as directly fetching data from ERA5. 1) What I don't understand is why are u and v component values ...
- 17
0
votes
1
answer
223
views
Saving plot from .nc file without showing the plot
I am trying to save the sequence of plots of 24 hours of ERA5 data from .nc file without plotting them. I am using xarray for reading .nc data. Here is my code:
import xarray as xr
import matplotlib....
- 17
0
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0
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46
views
Hue and intensity visualization from two bands in python
I would like to visualize this raster image (SAR interferogram) in a way that the phase band gives the color to the pixel and the coherence gives the intensity (value). This is the image: https://...
- 138
0
votes
1
answer
213
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Plot GeoJSON on top of raster plot
I am trying to plot a GeoJSON file on top of a raster. While different questions have touched this topic, I have not found a specific one addressing the approach I need.
I would prefer using imshow ...
- 1,108
3
votes
1
answer
302
views
Using different projections in insets with Matplotlib/Geopandas
In Matplotlib I can create inset plots with .inset_axes(). This works very well with GeoPandas, allowing me to do e.g.:
inset = ax.inset_axes([x, y, w, h])
df_main.plot(ax=ax, ...)
df_subset.plot(ax=...
- 749
0
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0
answers
22
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Cartopy draws values that equal to zero in the array as non zero values
I draw a map of a parameter with matplotlib and cartopy. Use cartopy crs Mercator (also I tried AlbersEqualArea - result is the same).
An array (2d as it's a mesh) has some float values like 1.1 - 5....
1
vote
1
answer
631
views
Geopackage how to view whats in it - Python
I'm pretty new when it comes to GIS and such. I am trying to see what data is available inside a geopackage that I downloaded off Natural Earth in Python. How do I do this?
#import libraries
import ...
- 11
2
votes
0
answers
345
views
QGIS 3.18 error on install python modules for SCP
I downloaded the QGIS 3.18 version for Mac. (College assignment). I need to also download the SCP plugin, however when I do that, I get errors "when importing scipy and matplotlib" ...
2
votes
1
answer
688
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GeoPandas | Plot separate groups of many MultiPolygons
Goal: Plot 8 graphs; each with 3 legends, and 1-to-many Polygons.
I have 3 lists: extracted_poly, original_poly_flip_y, wkt_poly_flip_y
These represent sources of the same annotations I want to ...
0
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0
answers
12
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Rasterio how to find same values in excel
I have two geographical tiff files, the difference is 20 years. There are some values in the pixels of these drawings. I need to find differences between the second file and the first one. I tried ...
1
vote
1
answer
798
views
Python imshow will not overlay -- only display last line's map
I have the following code that when run separately, displays two maps:
Map1:
f = h5py.File(filename[0], 'r')
group_id='Soil_Moisture_Retrieval_Data_AM'
var_id = 'soil_moisture'
a = f[group_id][var_id][...
- 11
0
votes
1
answer
487
views
Plotting LiDAR data with matplotlib
I am trying to plot a las file with one million points in Matplotlib. When I try to plot the file it always gives me a blank result.
This is the code I am using:
import numpy as np
import laspy
from ...
- 55
1
vote
1
answer
163
views
Iteratively plot large shapefiles using matplotlib
I am working with the National Wetlands Inventory, a set of shapefiles that describe all wetlands in the United States. There are 50 states, and each state has at least one shapefile (some have more ...
- 43
1
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0
answers
238
views
How to plot the map correctly over the SST data in cartopy?
I am trying to plot L2 Sea Surface Temperature data and I want to plot it over the globe in a geostationary projection. I tried the following code:
import h5py
import sys
import numpy as np
import ...
1
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0
answers
119
views
Link image position and size to figure's dpi
Is there a method to link image position and size to figure's dpi?
With the code below I'm be able to plot a chart.
fig = plt.figure(figsize=(10, 10), dpi=100)
plt.subplots_adjust(left=0, right=1, top=...
- 920
0
votes
1
answer
275
views
Plotting Raster Above a shapefile
I'm trying to plot a raster above a shapefile in python. My code is working however I can't seem to get the raster to plot above the shapefiles. It only appears when I don't show countries, rivers ...
0
votes
1
answer
5k
views
plt.title not displaying
I am unable to add plt.title
import numpy as np
import geopandas as gpd
from shapely.geometry.polygon import LinearRing
import pyproj
import cartopy.crs as ccrs
import cartopy.feature as cfeature
...
- 315
1
vote
1
answer
1k
views
Increase map size with subplots and Cartopy
I try to make subplot maps with Cartopy using data from xarray tutorial and increase each map in vertical size, but failed. Also making colorbar at each specific subplots.
import matplotlib.pyplot as ...
- 209
1
vote
1
answer
1k
views
Converting ee.Image to numpy array in Earth Engine Python API takes too much time [closed]
I am using Earth Engine's Python API to convert ee.Image() to Python plots. I am currently using the ee.sampleRectangle() function to convert ee.Image() to a NumPy array and then using matplotlib's ...
1
vote
0
answers
362
views
Could not find the matplotlib module. Make sure the matplotlib is installed
When I open my QGIS this message is open :
Could not find the matplotlib module. Make sure the matplotlib is
installed.
I am trying to install the matplotlib through OSGeo shell (windows system) but ...
- 11
1
vote
0
answers
350
views
How to produce a Cartopy map in UTM with north-east up?
I'm currently trying to produce maps of a shoreline, which runs roughly from south-east - north-west in an UTM projection to visualize shoreline change. By default Cartopy maps are in north up. Is ...
- 33
3
votes
0
answers
491
views
Making spatial pie chart using two columns in GeoPandas
I am trying to make a pie chart that looks like the one below:
-
I am using GeoPandas for that:
us_states = gpd.read_file("conus_state.shp")
data = gpd.read_file("data_file.shp")
...
- 323
1
vote
1
answer
36
views
Display the date on a time series graph
I have the following script that displays graphs of a time series for a variable:
import pandas as pd
from pandas import read_csv
from matplotlib import pyplot
%matplotlib inline
from matplotlib.pylab ...
- 155
0
votes
1
answer
108
views
Plotting Open Data Cube xarray data with two or more measurement parameters in the same axis
How can I plot the two measurement parameters (seasonal cover and permanent water cover) in the same axis as I want to compare them?
I have this code:
#load the cgls product
ds_cgls_builtcover = dc....
1
vote
1
answer
2k
views
Incorrect plotting of point and line
I'm learning how I can plot shapely's geometries with matplotlib. I have the point and line below:
point = Point(-170.212027219433033, 80.62335710279816)
linestring = LineString([(-0.446866298572111, -...
- 920
1
vote
1
answer
179
views
GDAL hillshade doesn't match with Matplotlib Basemap coastline
I try to plot hillshade image processed with GDAL with matplotib basemap coastline, but the resulting projection did not match. Here are my code:
from mpl_toolkits.basemap import Basemap
import ...
0
votes
1
answer
1k
views
Plotting multiple subplots with different shapefiles in background
I am trying to plot side by side GeoPandas shapefiles using matplotlib but the titles, xlabel and ylabel are not plotting correctly.
fig, axes = plt.subplots(1,2, figsize=(10,3), sharex=True, sharey=...
- 175
2
votes
1
answer
3k
views
Set red color to NaN values with matplotlibs with subplots
I need to plot four arrays arranged in subplots using Python and matplotlib.
I prefer grey scale colormap.
How to plot the NaN values that can be present in each array in red?
import matplotlib.pyplot ...
- 1,037
1
vote
1
answer
812
views
Customize axis and labels of rasterio plots
I have three plots consisting in a vector polygon over three different raster layers arranged in facets.
I used rasterio, geopandas and matplotlib.
I would modify the labels of axis in order to show ...
- 1,037
2
votes
1
answer
574
views
Contextily adds blank space to the right of matplotlib panel plot
I am unsure why I get this blank space to the right hand side of my panel plot when I add a contextily basemap.
See the image example below:
Here is a reproducible example:
import geopandas as gpd
...
2
votes
1
answer
1k
views
Overlay raster and vector using matplotlib and faceting
I'm using the function imshow from matplotlib to display several rasters using faceting.
I need to overlay the vector vec.shp on each raster in each facet.
I would prefere to do this with matplotlib ...
- 1,037
8
votes
3
answers
3k
views
Displaying GeoTIFF file in Python
I have a list of GeoTIFF files, which I uploaded to a repo in Github. The files are generated in R, there I can read them with the raster library :
> library(raster)
Loading required package: sp
&...
- 183
1
vote
0
answers
376
views
Plotting images from Google Earth Engine?
I am trying to plot GEE images as standalone figures (e.g., JPEG or PNG) for publications, however, I have not been able to find a standard method for doing that. For example, I have a landcover image ...
- 103
4
votes
3
answers
10k
views
Shapely deprecation warning message when plotting GeoPandas geodataframe
I am trying to plot a GeoPandas geodataframe as I always do. Now I am having a new pc when I try to plot my geodataframe using : gdf.plot() there is no plot displayed and I receive this message:
C:\...
- 93
1
vote
1
answer
465
views
How to change projection in geoplot
I have trouble printing a map in Austrian Lambert projection.
I use matplotlib and geoplot. It all works fine as long as the shapefile has WGS84 (epsg=4326), or if not is set to these CRS (using file....
- 157
3
votes
1
answer
709
views
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 ...
- 1,219
2
votes
1
answer
362
views
How to plot spatial data in Python with axis in DMS format?
I have a plot that displays a raster file and shapefiles with the axes shown in lat/lon. Is there an option to change the axis to DMS instead?
coastline = gpd.read_file('.shp')
coords = gpd.read_file('...
- 21
1
vote
0
answers
657
views
Ploting GEE image with imshow and adding an cartopy.io.img_tiles using add_image
I transformed a GEE image in an numpy array and I'm trying to plot a this array using plt.imshow() with a background image of cartopy image tiles (cimgt) with .add_image(). However, the array and ...
- 13
2
votes
2
answers
555
views
Cannot plot GeoDataFrame [closed]
I am new to geopandas and having trouble plotting geometry. I have searched the forum and none of the other questions address this issue.
import shapely.wkt
import geopandas as gpd
import pandas as pd
...
- 41
0
votes
2
answers
252
views
Mapleaflet- Latitude and longitudes are properly not getting plotted
I am using Leaflet (Mplleaflet) to plot and display a simple polygon of an area on a map. I took the points, correctly, from Google Earth but it is not plotting the coordinates on the city of Kolkata ...
user175462
1
vote
1
answer
133
views
Array is visualized differently in matplotlib than QGIS
I am getting different resutls when plotting a np.array with matplotlib than when doing it in an external software - QGIS. Here is what I have:
print(wiw[0].shape)
(1, 8433, 9254)
print(wiw[0]...
- 1,108
2
votes
0
answers
1k
views
Plotting maps using Matplotlib with a loop: Only two of four iterations completing
Using two different dataframes (Itis and Myyrmanni), I'm attempting to use a loop to plot four different maps with Matplotlib. Each respective dataframe is to be represented with two different maps: ...
2
votes
1
answer
4k
views
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 ...
- 159