Having some GMap plot problems

Community Support
1

Hi All,

I am trying to work with the GMapPlot to display the metadata of a project I am working on.

It involves mapping a large number (300,000 circles). I have been trying to use the Charts.GMapPlot, following some examples and some trial and error.

Firstly, I get a bit of (seemingly) buggy behaviour with the plot. After I produce it I often need to save the notebook (with the figure inline) and re-open it to view the results displayed correctly (otherwise the map is almost entirely outside of the plot frame, which itself is blank). Apart from that, I tried adding some tools to the plot, but I get some behaviour which isn’t quite optimal, and some things that also seem buggy. Any ideas how I can get around it?

  1. Reset tool: currently this resets the lon/lat (x,y) values to 0.0, and 0.0, at original zoom level: would be good to over-ride these values to the originally specified lat. lon. set in GMapOptions.

  2. Box Zoom Tool: this appears to just centre the plot over the centre point of the box zoom, without changing the zoom level of the map.

  3. Pan bug? When I pan, the glyphs (in my case circles), can become dissociated from their correct map location.

  4. Color scale: Is it possible to add a colour scale legend relating to the colours assigned to my circle glyphs?

You can see my example and code in the below notebook:

http://nbviewer.ipython.org/github/benlaken/ECCO/blob/master/iPlots_xyGMap.ipynb

If you want to play with the code directly, it (and the dependency file) is in my rather messy repo at https://github.com/benlaken/ECCO

Also, I am new to using Bokeh, so if you see a better way for me to do something, please let me know.

Thanks,

—Benjamin

2

Hi Benjamin,

I’ll try to take a look more in details about the issues you’ve posted. There are a couple of things that are not clear to me thought:

  • What version of Bokeh are using?

  • You’ve mentioned you are trying Charts.GMapPlot but in the NB you’ve linked here you are using bokeh.models.GMapPlot directly. Are you having the issues with both classes?

Please note that Charts.GMapPlot is still very experimental and have actually been removed in the upcoming release 0.8. It’s very likely to be reintroduced in future releases but we don’t have an exact date for that now. With that in mind I’d recommend you to use it from bokeh.models instead.

Thank you

Fabio

···

On Sunday, February 15, 2015 at 2:23:07 PM UTC+1, Benjamin Laken wrote:

Hi All,

I am trying to work with the GMapPlot to display the metadata of a project I am working on.

It involves mapping a large number (300,000 circles). I have been trying to use the Charts.GMapPlot, following some examples and some trial and error.

Firstly, I get a bit of (seemingly) buggy behaviour with the plot. After I produce it I often need to save the notebook (with the figure inline) and re-open it to view the results displayed correctly (otherwise the map is almost entirely outside of the plot frame, which itself is blank). Apart from that, I tried adding some tools to the plot, but I get some behaviour which isn’t quite optimal, and some things that also seem buggy. Any ideas how I can get around it?

  1. Reset tool: currently this resets the lon/lat (x,y) values to 0.0, and 0.0, at original zoom level: would be good to over-ride these values to the originally specified lat. lon. set in GMapOptions.
  1. Box Zoom Tool: this appears to just centre the plot over the centre point of the box zoom, without changing the zoom level of the map.
  1. Pan bug? When I pan, the glyphs (in my case circles), can become dissociated from their correct map location.
  1. Color scale: Is it possible to add a colour scale legend relating to the colours assigned to my circle glyphs?

You can see my example and code in the below notebook:

http://nbviewer.ipython.org/github/benlaken/ECCO/blob/master/iPlots_xyGMap.ipynb

If you want to play with the code directly, it (and the dependency file) is in my rather messy repo at https://github.com/benlaken/ECCO

Also, I am new to using Bokeh, so if you see a better way for me to do something, please let me know.

Thanks,

—Benjamin

3

Hi Fabio, I am using version 0.7.1.

So far I am having trouble getting much of the GMaps to work - the lack of documentation and examples makes it quite difficult for me, and the multiple classes is also adding to my confusion.

Any ideas where I should start? I had previously just followed the example in the bokeh example (glyph folder).

Best,

—Benjamin

···

On 16 Feb 2015, at 00:19, Fabio Pliger [email protected] wrote:

Hi Benjamin,

I’ll try to take a look more in details about the issues you’ve posted. There are a couple of things that are not clear to me thought:

  • What version of Bokeh are using?
  • You’ve mentioned you are trying Charts.GMapPlot but in the NB you’ve linked here you are using bokeh.models.GMapPlot directly. Are you having the issues with both classes?

Please note that Charts.GMapPlot is still very experimental and have actually been removed in the upcoming release 0.8. It’s very likely to be reintroduced in future releases but we don’t have an exact date for that now. With that in mind I’d recommend you to use it from bokeh.models instead.

Thank you

Fabio

On Sunday, February 15, 2015 at 2:23:07 PM UTC+1, Benjamin Laken wrote:

Hi All,

I am trying to work with the GMapPlot to display the metadata of a project I am working on.

It involves mapping a large number (300,000 circles). I have been trying to use the Charts.GMapPlot, following some examples and some trial and error.

Firstly, I get a bit of (seemingly) buggy behaviour with the plot. After I produce it I often need to save the notebook (with the figure inline) and re-open it to view the results displayed correctly (otherwise the map is almost entirely outside of the plot frame, which itself is blank). Apart from that, I tried adding some tools to the plot, but I get some behaviour which isn’t quite optimal, and some things that also seem buggy. Any ideas how I can get around it?

  1. Reset tool: currently this resets the lon/lat (x,y) values to 0.0, and 0.0, at original zoom level: would be good to over-ride these values to the originally specified lat. lon. set in GMapOptions.
  1. Box Zoom Tool: this appears to just centre the plot over the centre point of the box zoom, without changing the zoom level of the map.
  1. Pan bug? When I pan, the glyphs (in my case circles), can become dissociated from their correct map location.
  1. Color scale: Is it possible to add a colour scale legend relating to the colours assigned to my circle glyphs?

You can see my example and code in the below notebook:

http://nbviewer.ipython.org/github/benlaken/ECCO/blob/master/iPlots_xyGMap.ipynb

If you want to play with the code directly, it (and the dependency file) is in my rather messy repo at https://github.com/benlaken/ECCO

Also, I am new to using Bokeh, so if you see a better way for me to do something, please let me know.

Thanks,

—Benjamin

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4

Hi Benjamin,

This is a bug and I’ve been able to reproduce it on master branch as well. Thanks for reporting. I’ve opened an issue here: https://github.com/bokeh/bokeh/issues/1938

Best

Fabio

···
5

Thanks Fabio - sorry I don’t have the ability to help you pin down the exact bugs myself.

Best,

—Benjamin

···

On 19 Feb 2015, at 13:26, Fabio Pliger [email protected] wrote:

Hi Benjamin,

This is a bug and I’ve been able to reproduce it on master branch as well. Thanks for reporting. I’ve opened an issue here: https://github.com/bokeh/bokeh/issues/1938

Best

Fabio

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