No background map from arcgisimage

Dear All,
I am working with Python3.5.2 with matplotlib '3.0.3' version, my basemap version is the 1.1.0. I have an Ubuntu 16.04 Laptop.
I have this code (to plot a seismic epicenter over the background map from arcgisimage server):

m = Basemap(projection='mill', llcrnrlon=-70.20, llcrnrlat=-30.00, urcrnrlon=-56.90, urcrnrlat=-9.10,
            resolution='c',epsg= 4326, ax=ax1)
m.arcgisimage(service='World_Topo_Map', xpixels = 2000, verbose= False)
m.drawcoastlines()
m.drawcountries(color='yellow',linewidth=2.7)
m.drawmeridians(np.arange(0, 360, 2.5), labels=[True,False,False,True])
m.drawparallels(np.arange(-90, 90, 2.5),labels=[False,True,True,False])

with open(epi) as f:
    reader=csv.reader(f, delimiter=';')
    next(reader)
    for uhu in reader:
        lat.append(float(uhu[0]))
        lon.append(float(uhu[1]))
        mag.append(float(uhu[2]))
        depth.append(float(uhu[3]))

min_marker_size = 1.7
for lons, lats, mags in zip(lon, lat, mag):
    x,y = m(lons, lats)
    msize = mags * min_marker_size
    m.plot(x, y, 'ro', markersize=msize)

plt.show()

Under Windows 10 this code works nice and I can see the wonderful background map, however at Linux O.S. I am not able to see the background map, is this an issue of matplotlib or basemap?.

The first figure is taken from Win10, the second figure is taken from Ubuntu16.04

Regards,

That is odd. I wouldn't expect a difference in behavior between OSes. If you set `verbose` to `True`, do you see error or warning messages on Ubuntu?

…

On Fri, Dec 27, 2019 at 11:32 AM Gonzalo Antonio Fernandez Marañon < ***@***.***> wrote: Dear All, I am working with Python3.5.2 with matplotlib '3.0.3' version, my basemap version is the 1.1.0. I have an Ubuntu 16.04 Laptop. I have this code (to plot a seismic epicenter over the background map from arcgisimage server): m = Basemap(projection='mill', llcrnrlon=-70.20, llcrnrlat=-30.00, urcrnrlon=-56.90, urcrnrlat=-9.10, resolution='c',epsg= 4326, ax=ax1) m.arcgisimage(service='World_Topo_Map', xpixels = 2000, verbose= False) m.drawcoastlines() m.drawcountries(color='yellow',linewidth=2.7) m.drawmeridians(np.arange(0, 360, 2.5), labels=[True,False,False,True]) m.drawparallels(np.arange(-90, 90, 2.5),labels=[False,True,True,False]) with open(epi) as f: reader=csv.reader(f, delimiter=';') next(reader) for uhu in reader: lat.append(float(uhu[0])) lon.append(float(uhu[1])) mag.append(float(uhu[2])) depth.append(float(uhu[3])) min_marker_size = 1.7 for lons, lats, mags in zip(lon, lat, mag): x,y = m(lons, lats) msize = mags * min_marker_size m.plot(x, y, 'ro', markersize=msize) plt.show() Under Windows 10 this code works nice and I can see the wonderful background map, however at Linux O.S. I am not able to see the background map, is this an issue of matplotlib or basemap?. The first figure is taken from Win10, the second figure is taken from Ubuntu16.04 Regards, [image: basemap_Windows10] <https://github.com/proxy/user-images.githubusercontent.com/9260897/71524578-92bf9c80-28a4-11ea-9379-45c8827793ab.png> [image: basamap_Ubuntu] <https://github.com/proxy/user-images.githubusercontent.com/9260897/71524647-c995b280-28a4-11ea-8c68-105fd5ac64e1.png> — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#481?email_source=notifications&email_token=AACHF6AXSNS6CWSDOAP6X53Q2YU3RA5CNFSM4J76VW32YY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4IC4M5NA>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACHF6FTPNCKSROTB2FKPTLQ2YU3RANCNFSM4J76VW3Q> .

@WeatherGod

Dear @WeatherGod ,

I saw just a warning updating the 'verbose=True'

FutureWarning: '+init=<authority>:<code>' syntax is deprecated. '<authority>:<code>' is the preferred initialization method.
  return _prepare_from_string(" ".join(pjargs))
http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/export?bbox=-4022.163721818379,-1718.8733853924696,-3260.129854294384,-521.3915935690491&bboxSR=4326&imageSR=4326&size=2000,3142&dpi=96&format=png32&transparent=true&f=image

The link under my Ubuntu 16.04 it is just an empty image
Thank you for your time.
Tonino

I have the same issue on Mac OSX...

Same here, on macOS 10.15.7 (Catalina) Python 3.8 Matplotlib version 3.2.1.

@vc1492a

@vc1492a I think this issue could be the same one as in #499 and the current master already includes the bugfix. Which basemap version are you using?

@molinav

@molinav thanks for the prompt reply - after some more diagnosis ended up being an unrelated issue, thanks!

@guziy

I am closing this issue because the problem in the OP is actually solved now. The key point is the traceback of the URL:

http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/export?bbox=-4022.163721818379,-1718.8733853924696,-3260.129854294384,-521.3915935690491&bboxSR=4326&imageSR=4326&size=2000,3142&dpi=96&format=png32&transparent=true&f=image

where the bounding box should contain "standard" latitudes and longitudes (since the OP uses EPSG 4326), but instead it contains out-of-bound values due to an unexpected radian-to-degree conversion factor applied inside Basemap.arcgisimage before generating the URL.

This problem was fixed in PR #505 by @guziy, but this PR introduced a new bug in any projection different from "cyl". This new bug was finally fixed in PR #548 and released with basemap version 1.3.4.

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No background map from arcgisimage #481

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No background map from arcgisimage #481

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WeatherGod commented on Dec 28, 2019

tonino0013 commented on Dec 29, 2019

FMassin commented on Jul 20, 2020

vc1492a commented on Feb 14, 2021

molinav commented on Feb 14, 2021

vc1492a commented on Feb 16, 2021

molinav commented on Aug 10, 2022

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