BasemapTutorial | A Basemap tutorial for ReadTheDocs | Learning library
kandi X-RAY | BasemapTutorial Summary
kandi X-RAY | BasemapTutorial Summary
A Basemap tutorial for ReadTheDocs
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- Read color table .
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BasemapTutorial Examples and Code Snippets
Community Discussions
Trending Discussions on BasemapTutorial
QUESTION
when I tried this drawmapscale example I got the exact results from there:
but when I run the following:
...ANSWER
Answered 2018-Nov-30 at 01:29I set the figure size bigger, then plot, and get a map with better scale bar.
QUESTION
I have run into problems when using Basemap.contour
with certain projections. Based on the example given in the Basemap documentation, I created the following working code which produces the expected result. The example uses the 'tmerc' projection.
ANSWER
Answered 2017-Sep-26 at 18:35This behavior is according to python3 integer division. Look for examples:
1) python3:
QUESTION
I am searching way to fill polygons of a shapefile based on a value. So far from basemap tutorial (http://basemaptutorial.readthedocs.io/en/latest/shapefile.html) i 've found how to fill the polygons with a specific color.
...ANSWER
Answered 2018-Jan-30 at 13:20It seems you want to produce a choropleth plot in basemap.
To this end you need a colormap cmap
and a normalization norm
in order to map values to colors, cmap(norm(val))
. For each shape one may than set the Polygon
's color to the respective color from the dictionary, in this case cmap(norm(dict1[info['ID_2']]))
.
Inside the PatchCollection
the match_original=True
needs to be set to keep the colors from the original polygons.
At the end it may be useful to produce a colormap from the colormap and the normalization.
QUESTION
Matplotlibs basemap module hast the ability to draw a background for a map, with inbuilt functions for some basic maps and the ability to tie into arcgis maps.
Both options work well, but are really slow (see also here), especially the arcgis option.
For a single plot, this is not a big issue, but with multiple plots (around 500 in my case) this becomes quite the waiting exercise, plus, I wouldn't want to send hundreds of requests to arcgis, that always fetch the identical map anyways.
But how do I set up/download a background map once, and keep using it in a loop that is plotting many versions of it?
I have adapted the great circle example from the documentation with an etopo background a a loop through some colors for a test:
...ANSWER
Answered 2017-Sep-21 at 15:30I guess the idea would be to keep the basemap plot and not change it. In the loop add the artist you want to have changing from image to image, save the figure, then remove the artist.
QUESTION
After reading the the basemap tutorial on annotating and adding text, I'm still running into a few issues with this.
...ANSWER
Answered 2017-Jun-27 at 20:24To put some text at position (x,y)
you would use plt.text()
instead of plt.plot()
(as plot
plots a lineplot, not a text).
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Install BasemapTutorial
You can use BasemapTutorial like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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