readshapefile() raises incorrect error msg regarding shpproj and shapelib

Personne n'a encore pris cette issue.

When plotting a shapefile using readshapefile()

`m.readshapefile(shapefile_path, 'roads')`

I received this error message:

`ValueError: shapefile must have lat/lon vertices - it looks like this one has vertices
in map projection coordinates. You can convert the shapefile to geographic
coordinates using the shpproj utility from the shapelib tools
(http://shapelib.maptools.org/shapelib-tools.html)`

However, it appears that the specified module "shapelib" is no longer maintained or available. To add to the confusion, there is a completely different module that also goes by the name "shapelib" available on pypi and github, but that does not contain the functionality suggested above.

In regard to a suggested solution. I found the fix on this site to be useful for converting the shapefile and getting past this readshapefile() error.
http://fascicul.us/convert-display-shapefile-matplotlib.html

However, this conversion sometimes leads to a new error:

`ValueError: readshapefile can only handle 2D shape types`

Which I have yet to find a way to resolve

Commencez au point d’entrée readshapefile() et examinez le chemin d’erreur qui recommande shpproj de shapelib. Reproduisez la conversion signalée ainsi que l’échec ultérieur « only handle 2D shape types », puis déterminez si les indications ou la gestion sont incorrectes. Le travail est terminé lorsque le message d’erreur et les indications de conversion reflètent correctement les outils disponibles et les types de shape pris en charge.

Rédigé par le modèle d'indexation à partir du texte de l'issue.