svg_cleaner.py

import re
import json
import numpy as np
from BeautifulSoup import BeautifulStoneSoup as Stone

f = open('new-basemap-borders-01.svg')
svg = f.read()
f.close()

soup = Stone(svg)

polys = soup.findAll('polyline')
listing = []

t = [15.7475,0.0,0.0,15.7475,98.351,147.526]            # the transform params
#t = [1.0, 0.0, 0.0, 0.0, 1.0, 0.0]
mat = np.matrix([
    [ t[0], t[2], t[4] ],
    [ t[1], t[3], t[5] ],
    [  0.0,  0.0,  1.0 ]
])

for poly in polys:
    string = poly['points'].strip()
    
    string = re.sub( ' ?[\r\n]{1,2}\t+', ' ', string )
    # print string
    points = string.split(' ')
    for i, point in enumerate(points):
        p = map( lambda x: [ float(x) ], point.split(',') )
        p.append( [ 1.0 ] )
        pm = np.matrix( p )
        
        xform = mat * pm
        
        formd = map(lambda x: str( round( x, 3 ) ), xform.transpose().tolist()[0][0:2])
        
        points[i] = ','.join(formd)

    string = ' '.join(points)
    listing.append( string )

print json.dumps( listing )