Fw: matplotlib - fill open path inside U.S. borders + sample map

Community matplotlib-users
1

The attached map shows plotted fill paths whose filling extends only to the U.S. borders. Is there any way I could accomplish something like it using Basemap?

Thanks

day2otlk_1730.gif

···

---------- Forwarded Message ----------
From: "Isidora" <isidora@...3269...>
To: matplotlib-users@lists.sourceforge.net
Subject: matplotlib - fill open path inside U.S. borders
Date: Mon, 26 Sep 2011 19:55:49 GMT

Hi,
I am trying to plot filled paths over a U.S. map. I plot the given paths, but since these are not closed paths, the filling is truncated at a line drawn between last and first point in the path. I want to extend the path to the United States border instead.

I am no expert in matplotlib or GIS. Could anyone help me find documentation or blogs discussing this type of issue? I am convinced somebody else has already faced this problem although I have not been able to find any paper, documentation, blog on it.

Thank you

2 

The attached map shows plotted fill paths whose filling extends only to the U.S. borders. Is there any way I could accomplish something like it using Basemap?
Thanks

Isidora:

It's probably possible, but there's no simple recipe.  The

drawcoastlines method returns a LineCollection which you should be
able to use to do what you want. Sorry I can’t be more specific,
but I don’t have time to go into any more depth right now.

-Jeff
···

<isidora@…3269…>matplotlib-users@lists.sourceforge.nethttp://p.sf.net/sfu/splunk-d2dcopy1Matplotlib-users@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/matplotlib-users

3 

The attached map shows plotted fill paths whose filling extends only to the U.S. borders. Is there any way I could accomplish something like it using Basemap?
Thanks

Isidora:

  It's probably possible, but there's no simple recipe.  The

drawcoastlines method returns a LineCollection which you should be
able to use to do what you want. Sorry I can’t be more specific,
but I don’t have time to go into any more depth right now.

  -Jeff

Isidora:  Another option would be to create a gridded field defining

the area you would like to enclose, use contourf to draw the
boundaries of the region, then mask out the ocean areas with the
maskoceans function.

-Jeff
···

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4

Hi Isidora, in the past I used the matlab function below for a similar
task. Maybe it can be adapted to your problem. If you can provide a
small sample of your problem I can try to implement that in python (it
has been in my TODO list for a while, but i cannot promise.)

http://woodshole.er.usgs.gov/operations/sea-mat/mapstuff-html/join_cst.m

-Filipe

···

On Wed, Sep 28, 2011 at 09:39, Jeff Whitaker <jswhit@...146...> wrote:

On 9/27/11 5:37 PM, Jeff Whitaker wrote:

On 9/27/11 4:57 PM, Isidora wrote:

The attached map shows plotted fill paths whose filling extends only to the
U.S. borders. Is there any way I could accomplish something like it using
Basemap?

Thanks

Isidora:

It's probably possible, but there's no simple recipe. The drawcoastlines
method returns a LineCollection which you should be able to use to do what
you want. Sorry I can't be more specific, but I don't have time to go into
any more depth right now.

-Jeff

Isidora: Another option would be to create a gridded field defining the
area you would like to enclose, use contourf to draw the boundaries of the
region, then mask out the ocean areas with the maskoceans function.

-Jeff

---------- Forwarded Message ----------
From: "Isidora" <isidora@...3269...>
To: matplotlib-users@lists.sourceforge.net
Subject: matplotlib - fill open path inside U.S. borders
Date: Mon, 26 Sep 2011 19:55:49 GMT

Hi,
I am trying to plot filled paths over a U.S. map. I plot the given paths,
but since these are not closed paths, the filling is truncated at a line
drawn between last and first point in the path. I want to extend the path
to the United States border instead.

I am no expert in matplotlib or GIS. Could anyone help me find
documentation or blogs discussing this type of issue? I am convinced
somebody else has already faced this problem although I have not been able
to find any paper, documentation, blog on it.

Thank you

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------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2dcopy1

_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options

------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2dcopy1
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options