Coordinates for glyphs on map

Community Support
1

I’m trying to get some of my own data on stamen toner tiles.

What co-ordinate system should I be converting to? Would be good to have this mentioned in the docs. From looking at docs and sample data I’d assumed lat/long would do the trick.

I’m no geographer, but looking at it It sort of looks like it might be UTM with some offset for zone?

Thanks,

Chris

2

Hi Chris,

I've been using stamen toner tiles with my own data.
My points are in the WGS84/Pseudo-mercator coordinates system.

However, if you want to use "GMapPlot", your points have to be in the lat/long system.

I didn't find any mention of it in the docs.
Also, I do not know if Bokeh can directly handle projection conversions.
Maybe, we could add some explanation in the "Mapping Geo Data" part of the documentation.

Hope it helps,

Jean

···

Le 24/03/2016 02:21, Chris a écrit :

I'm trying to get some of my own data on stamen toner tiles.

What co-ordinate system should I be converting to? Would be good to have
this mentioned in the docs. From looking at docs and sample data I'd
assumed lat/long would do the trick.

I'm no geographer, but looking at it It sort of looks like it might be
UTM with some offset for zone?

Thanks,
Chris

--
You received this message because you are subscribed to the Google
Groups "Bokeh Discussion - Public" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to [email protected]
<mailto:[email protected]>.
To post to this group, send email to [email protected]
<mailto:[email protected]>.
To view this discussion on the web visit
https://groups.google.com/a/continuum.io/d/msgid/bokeh/9dba3929-6b7c-4c0a-ae26-ae3251c0fd6d%40continuum.io
<https://groups.google.com/a/continuum.io/d/msgid/bokeh/9dba3929-6b7c-4c0a-ae26-ae3251c0fd6d%40continuum.io?utm_medium=email&utm_source=footer&gt;\.
For more options, visit https://groups.google.com/a/continuum.io/d/optout\.

3

Hi Chris -

Here’s an example of adding glyphs on Stamen toner tiles:

Let us know if you’re still stuck.

lukec

···

On Wednesday, March 23, 2016 at 8:21:20 PM UTC-5, Chris wrote:

I’m trying to get some of my own data on stamen toner tiles.

What co-ordinate system should I be converting to? Would be good to have this mentioned in the docs. From looking at docs and sample data I’d assumed lat/long would do the trick.

I’m no geographer, but looking at it It sort of looks like it might be UTM with some offset for zone?

Thanks,

Chris

4

Thanks Jean and Iukec!

That info set me on the right track and stuff shows up where I expected now!

Chris

···

On Thursday, March 31, 2016 at 12:20:05 AM UTC+10, [email protected] wrote:

Hi Chris -

Here’s an example of adding glyphs on Stamen toner tiles:

https://github.com/bokeh/bokeh/issues/3858#issuecomment-198414746

Let us know if you’re still stuck.

lukec

On Wednesday, March 23, 2016 at 8:21:20 PM UTC-5, Chris wrote:

I’m trying to get some of my own data on stamen toner tiles.

What co-ordinate system should I be converting to? Would be good to have this mentioned in the docs. From looking at docs and sample data I’d assumed lat/long would do the trick.

I’m no geographer, but looking at it It sort of looks like it might be UTM with some offset for zone?

Thanks,

Chris