[Qgis-user] Announcing ProfileFromLine plugin

[Benoit de Cabissole]

Hello again Ricardo,

You could be right!

After installing the latest version from the plugin repo I got the following error:

Couldn't load plugin ProfileFromLine due an error when calling its classFactory() method

Traceback (most recent call last):
  File "C:/PROGRAMS/OSGeo4W/apps/qgis-dev/./python\qgis\utils.py", line 138, in startPlugin
    plugins[packageName] = package.classFactory(iface)
  File "C:/Documents and Settings/Benoit/.qgis/python/plugins\ProfileFromLine\__init__.py", line 30, in classFactory
    from ProfileFromLine import ProfileFromLine
  File "C:/PROGRAMS/OSGeo4W/apps/qgis-dev/./python\qgis\utils.py", line 279, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "C:/Documents and Settings/Benoit/.qgis/python/plugins\ProfileFromLine\ProfileFromLine.py", line 25, in 
    from shapely.geos import geos_capi_version
ImportError: cannot import name geos_capi_version

Python version:
2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)]


QGIS version:
1.6.0-Trunk Trunk, 14077M


I'm running QGIS 1.6.14077M from OSGeo4W on Windows XP.
It then seems that the OSGeo4W Shapely libs (1.0.14-1) are quite old... And I do not know how to compile packages for OSGeo4W :-(


Thanks for the quick answer.

Cheers,
Benoit



> -----Original Message-----
> From: Ricardo Filipe Soares Garcia da
> [mailto:ricardo.garcia.silva at gmail.com]
> Sent: Saturday, 14 August 2010 16:55
> To: benoit at exigesa.com
> Cc: qgis-user
> Subject: Re: [Qgis-user] Announcing ProfileFromLine plugin
> 
> 
> Hi Benoit
> 
> > While testing it I've got the following error:
> 
> ...
> 
> > Any idea why?
> 
> I think you probably have an older version of the GEOS library. Please
> open a python console (it can be the Qgis python console) and type:
> 
> import shapely.geos
> shapely.geos.geos_capi_version
> 
> it should return a tuple with version 1.6.0 or higher (on my system it
> reads 1.6.2). Could this be the problem? What OS are you using?
> I added a check for this variable that will (hopefully) display an
> informative error message to the user.
> 
> > Another thing, could you tell what is the unit of Sampling 
> interval you are using? Is it in the project units (m, feet, ...) 
> or is it in another unit (the default, 4.00, seems very small to 
> be in metres, but it would depend on the type of project, I 
> suppose)? Also, the sampling interval is limited to 99.99, again, 
> if in the project units, this is a serious limitation. Could you 
> use an 'open' sampling interval?
> 
> Well, the unit for the sampling interval is actually the layer's own
> units according to its own reference system and not the project's. The
> default value of 4,00 is indeed in meters, because the original
> project for which I designed this plugin is dealing with lines that
> are 60m long or so. Anyway, I changed the 'sampling interval' spinbox
> to accept values in the range 0.01 - 1000000. I'll try to come up with
> a nicer solution, but in the mean time I hope it will work for people
> that are using longer line lengths.
> 
> I uploaded a newer version (0.3) to the repository so please test it
> out and see if it works for you.
> Thanks for testing it out :)
> 
> 
> -- 
> ___________________________ ___ __
> Ricardo Garcia Silva
>