title: plot trajectories on an map using basemap
body: <pre><code>import numpy as np
  data = np.loadtxt('path-tracks.csv',dtype=np.str,delimiter=',',skiprows=1)
  print data
  
  [['19.70' '-95.20' '2/5/04 6:45 AM' '1' '-38' 'CCM']
  ['19.70' '-94.70' '2/5/04 7:45 AM' '1' '-48' 'CCM']
  ['19.30' '-93.90' '2/5/04 8:45 AM' '1' '-60' 'CCM']
  ['19.00' '-93.50' '2/5/04 9:45 AM' '1' '-58' 'CCM']
  ['19.00' '-92.80' '2/5/04 10:45 AM' '1' '-50' 'CCM']
  ['19.20' '-92.60' '2/5/04 11:45 AM' '1' '-40' 'CCM']
  ['19.90' '-93.00' '2/5/04 12:45 PM' '1' '-43' 'CCM']
  ['20.00' '-92.80' '2/5/04 1:15 PM' '1' '-32' 'CCM']
  ['23.10' '-100.20' '30/5/04 4:45 AM' '2' '-45' 'SCME']
  ['23.20' '-100.00' '30/5/04 5:45 AM' '2' '-56' 'SCME']
  ['23.30' '-100.00' '30/5/04 6:45 AM' '2' '-48' 'SCME']
  ['23.30' '-100.20' '30/5/04 7:45 AM' '2' '-32' 'SCME']
  ['23.40' '-99.00' '31/5/04 3:15 AM' '3' '-36' 'SCM']
  ['23.50' '-98.90' '31/5/04 4:15 AM' '3' '-46' 'SCM']
  ['23.60' '-98.70' '31/5/04 5:15 AM' '3' '-68' 'SCM']
  ['23.70' '-98.80' '31/5/04 6:15 AM' '3' '-30' 'SCM']]
  </code></pre>
  
  <p>with the above code I get an array whose columns represent: [Lat, Lon, Date, Identifier, Temperatures, Category]. Now, I will put a code that allows me to plot the first and second column on the map of Mexico:</p>
  
  <pre><code>#!/usr/bin/python
  #Project Storm: Plot trajectories of convective systems
  #import libraries
  
  import numpy as np
  from mpl_toolkits.basemap import Basemap
  import  matplotlib.pyplot as pl
  
  # Plot a map for Mexico
  
  m = Basemap(projection='cyl', llcrnrlat=12, urcrnrlat=35,llcrnrlon=-120, urcrnrlon=-80, resolution='c', area_thresh=1000.)
  m.bluemarble()
  m.drawcoastlines(linewidth=0.5)
  m.drawcountries(linewidth=0.5)
  m.drawstates(linewidth=0.5)
  
  #Draw parallels and meridians
  
  m.drawparallels(np.arange(10.,35.,5.))
  m.drawmeridians(np.arange(-120.,-80.,10.))
  m.drawmapboundary(fill_color='aqua')
  
  #Open file whit numpy
  
  data = np.loadtxt('path-tracks.csv', dtype=np.str,delimiter=',', skiprows=1)
  latitude = data[:,0]
  longitude = data[:,1]
  
  #Convert latitude and longitude to coordinates X and Y
  
  x, y = m(longitude, latitude)
  
  #Plot the points on the map
  
  pl.plot(x,y,'ro-')
  pl.show()
  </code></pre>
  
  <p>The points plotted on the map, corresponding to three different paths. Mi final idea is to draw a line connecting the points associated with each path, How  I can do this?</p>
  
  <p>is posible draw an identifier or a mark for each path?</p>
  
  <p>how I can set the size of the figure so that it can distinguish the separation between the points?</p>