Basemap is a great tool for creating maps using python in a simple way. It's a `matplotlib <http://matplotlib.org/>`_ extension, so it has got all its features to create data visualizations, and adds the geographical projections and some datasets to be able to plot coast lines, countries, and so on directly from the library.
Basemap has got `some documentation <http://matplotlib.org/basemap/index.html>`_, but some things are a bit more difficult to find. I started a readthedocs page to extend a little the original documentation and examples, but it grew a little, and now covers many of the basemap possibilities.
The tutorial can be found at http://basemaptutorial.readthedocs.org/, and all the examples and its source code, at GitHub and it's available for sharing or being modified by adding the attribution.
The tutorial covers:
Basemap has got `some documentation <http://matplotlib.org/basemap/index.html>`_, but some things are a bit more difficult to find. I started a readthedocs page to extend a little the original documentation and examples, but it grew a little, and now covers many of the basemap possibilities.
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| Some of the examples from the tutorial |
The tutorial can be found at http://basemaptutorial.readthedocs.org/, and all the examples and its source code, at GitHub and it's available for sharing or being modified by adding the attribution.
The tutorial covers:
- An introductory chapter, showing the basic functionalities, and how to work with the included methods for reading shapefiles
- The explanation and an example for each of the basemap methods
- A section with more advanced examples, such as 3D maps, multiplots or WRF examples
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ReplyDeleteThis is really cool, you are helping me with a homework assignment, thanks so much! If I have any useful feedback I'll post here but wanted to say how thankful I am that someone has extended the cryptic documentation. Thanks!
ReplyDeleteI'm glad that you find it useful!
DeleteVery helpful tutorials.I am trying to find the coordinates: llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat for London. Can you please tell me how to find them?
ReplyDeleteThanks in advance.
Hi,
DeleteYou can either look on Google Maps the locations you want to show or, if you want to show London in the center, use the lon_0 and lat_0 plus the map size.
The three options are shown here: https://basemaptutorial.readthedocs.io/en/latest/basemap.html#passing-the-bounding-box
Hi Roger, I've benefited a lot from your tutorials and online docs. Basemap has been a fun tool for me to learn and use, so thanks!
ReplyDeleteI'm starting a project now that involves some 3d plotting. I've looked a bit here:
https://basemaptutorial.readthedocs.io/en/latest/basemap3d.html
and this is very useful.
The question I still have though, is how to add a shapefile to a 3D map. Is this currently possible with Basemap?
Thanks!
Hi Alex,
DeleteYes, just use the same steps as in https://basemaptutorial.readthedocs.io/en/latest/shapefile.html
to load the shapefile and draw the 3d map like in the example
I am working with WRF output using GDAL and learned a lot from your tutorial. Thanks so much!
ReplyDeleteOne thing that was not explained in the examples from WRF -or at least I could not find it- is how to get the start date and timesteps and other global attributes from the WRF output file using the GDAL library, or in some other way.
I tried to get the Times as gdal dataset, like the other variables, but that did not work.
Your advice will be appreciated
Kees (desde Holanda)
Hi, are you working with grib files or netcdf files?
ReplyDeleteGrib files have two metadata elements on each band: grib_ref_time and grib_valid_time, which give the unix timestamp for the model initialization time and the time when the Mayer us vàlid.
Netcdf has a global metadata element with the initial time, but I don't find the element for the band date.
Hi, thanks. I am working with netcdf files. I have been doing some googling and found some scripts that use scipy.netcdf library instead of gdal. I have now found a way to extract the Times variable from the wrfoutput.
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