python - Country labels on Basemap -

-

i plot trajectory on basemap, , have country labels (names) shown overlay.

here current code , map produces:

import pandas pd  import matplotlib.pyplot plt  mpl_toolkits.basemap import basemap   path = "path\\to\\data"  animal_data = pd.dataframe.from_csv(path, header=none) animal_data.columns = ["date", "time", "gps_lat", "gps_long"]  # data cleaning omitted clarity   params = {         'projection':'merc',          'lat_0':animal_data.gps_lat.mean(),          'lon_0':animal_data.gps_long.mean(),          'resolution':'h',          'area_thresh':0.1,          'llcrnrlon':animal_data.gps_long.min()-10,          'llcrnrlat':animal_data.gps_lat.min()-10,          'urcrnrlon':animal_data.gps_long.max()+10,          'urcrnrlat':animal_data.gps_lat.max()+10 } map = basemap(**params)  map.drawcoastlines() map.drawcountries() map.fillcontinents(color = 'coral') map.drawmapboundary()            x, y = map(animal_data.gps_long.values, animal_data.gps_lat.values)  map.plot(x, y, 'b-', linewidth=1)     plt.show()

this results in map: migration

this map of trajectory of migrating bird. while nice map (!), need country-name labels easy determine countries bird flying through.

is there straight-forward way of adding country names?

my solution relies on external data file may or may not available in future. however, similar data can found elsewhere, should not of problem.

first, code printing country-name labels:

import pandas pd  import matplotlib.pyplot plt  mpl_toolkits.basemap import basemap  class mybasemap(basemap):          def printcountries(self, d=3, max_len=12):         data = pd.io.parsers.read_csv("http://opengeocode.org/cude/download.php?file=/home/fashions/public_html/opengeocode.org/download/cow.txt",                                        sep=";", skiprows=28 )         data = data[(data.latitude > self.llcrnrlat+d) & (data.latitude < self.urcrnrlat-d) & (data.longitude > self.llcrnrlon+d) & (data.longitude < self.urcrnrlon-d)]         ix, country in data.iterrows():                                             plt.text(*self(country.longitude, country.latitude), s=country.bgn_name[:max_len])

all download country-location database here, select countries on map, , label them.

the complete code:

import pandas pd  import matplotlib.pyplot plt  mpl_toolkits.basemap import basemap  class mybasemap(basemap):          def printcountries(self, d=3, max_len=12):         data = pd.io.parsers.read_csv("http://opengeocode.org/cude/download.php?file=/home/fashions/public_html/opengeocode.org/download/cow.txt",                                        sep=";", skiprows=28 )         data = data[(data.latitude > self.llcrnrlat+d) & (data.latitude < self.urcrnrlat-d) & (data.longitude > self.llcrnrlon+d) & (data.longitude < self.urcrnrlon-d)]         ix, country in data.iterrows():                                             plt.text(*self(country.longitude, country.latitude), s=country.bgn_name[:max_len])    path = "path\\to\\data"  animal_data = pd.dataframe.from_csv(path, header=none) animal_data.columns = ["date", "time", "gps_lat", "gps_long"]  params = {         'projection':'merc',          'lat_0':animal_data.gps_lat.mean(),          'lon_0':animal_data.gps_long.mean(),          'resolution':'h',          'area_thresh':0.1,          'llcrnrlon':animal_data.gps_long.min()-10,          'llcrnrlat':animal_data.gps_lat.min()-10,          'urcrnrlon':animal_data.gps_long.max()+10,          'urcrnrlat':animal_data.gps_lat.max()+10 }  plt.figure() map = mybasemap(**params)  map.drawcoastlines() map.fillcontinents(color = 'coral') map.drawmapboundary()           map.drawcountries() map.printcountries()  x, y = map(animal_data.gps_long.values, animal_data.gps_lat.values)  map.plot(x, y, 'b-', linewidth=1)     plt.show()

and finally, result:

labeld-map

clearly isn't labeled 1 might hope, , heuristics regarding country size, name length , map size should implemented make perfect, starting point.


Comments

Post a Comment

Popular posts from this blog

c# - Where does the .ToList() go in LINQ query result -

-
when getting data populate data grid, have pulled data, made list , mapped model, this: public list<person> getpeople() { var data = _db.person.tolist(); list<person> people = new list<person>(); foreach (var item in data) { person person = new person() { personid = item.personid, firstname = item.firstname, lastname = item.lastname }; people.add(person); } return people; } this works fine, in interest of writing less code discovered .select method , (what think is) anonymous type. have: public list<person> getpeople() { return _db.person.select(d => new person { personid = item.personid, firstname = item.firstname, lastname = item.lastname }).tolist(); } though not easy read, works fine too. there preference either way? ...
Read more

Listeners to visualise results of load test in JMeter -

-
i want run load test in non-gui mode , save results in .csv file. (i have not modified .properties files, standard information saved) i plan load file , visualise results jmeter’s listeners. which listeners suited purpose? should avoid @ cost, might cause me misinterpret information? (e.g. in view results tree response data empty have - - not saved this. however, there has in fact been response. if saw listener might think there hasn’t been one. since want avoid this, listeners have gain information needed .csv file.) i’d know both jmeter listeners plugins. if running test in non-ui mode ideally should disable listeners in script. use '-l' option store test results .jtl extension. can later open jtl file jmeter. aggregate report or summary report should summarize test results , response time , throughput. if want plot graphs see trends on test duration can use http://jmeter-plugins.org/#/ standard , lib set. i suggest following listeners: response ...
Read more

android - CollapsingToolbarLayout: position the ExpandedText programmatically -

-
i using new android support design view collapsingtoolbarlayout. have need position expandedtitle programmatically. actually way set position expandedtitle in .xml file (example here: https://goo.gl/l5h5fc ) there no public api set text position programmatically , fields private . do know if it's possible without reflection or 'hacky' tricks? i have solved problem exposing properties via reflection ( https://gist.github.com/fpezzato/8e7d45112883dbbc5ffb ), works don't use trick in production code. @google: please no more private or final stuff! :)
Read more