Madhura Jayaratne is implementing his OpenGIS project with flot, the jquery plotting library.
Will this library be included in pma releases in the future? If yes, I would also use flot for the charts on the status page. It seems more clever to generate the graphs on the client, rather than creating png files on the server and transfer them. It would reduce server load and allows for a lot more possibilities on the client-side.
On Wed, May 18, 2011 at 4:23 PM, Tyron Madlener tyronx@gmail.com wrote:
Madhura Jayaratne is implementing his OpenGIS project with flot, the jquery plotting library.
Will this library be included in pma releases in the future? If yes, I would also use flot for the charts on the status page. It seems more clever to generate the graphs on the client, rather than creating png files on the server and transfer them. It would reduce server load and allows for a lot more possibilities on the client-side.
Hi Tyron,
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot. For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot. For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
On Fri, May 20, 2011 at 11:13 AM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot. For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
I just read up that you can do export bitmaps drawn on the <canvas> Element to pngs and such. Both flot and jQuery-SVG seem to be drawing on a <canvas> flot mentions this in the 3rd Question of its FAQ: http://flot.googlecode.com/svn/trunk/FAQ.txt - but also mentions some issues with it. This article has a paragraph 'Exporting & Saving' that reveals some more details about this technique: http://html5doctor.com/an-introduction-to-the-canvas-2d-api/
One would need to try out how well such png exports work. Alternatively, it shouldn't be a problem to offer a print view or pdf export. Usually the graph image alone without any context is not very informative anyway.
As for my project, I probably also can use the existing pChart library aswell if I solve the caching issues that cause the graph not to update and let the user wait each time until the graph has been created on the server side. But if Madhura is going to use a javascript charting library that also fits my needs I would surely prefer that over pChart.
-- Michal Čihař | http://cihar.com | http://blog.cihar.com
What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Phpmyadmin-devel mailing list Phpmyadmin-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/phpmyadmin-devel
On Fri, May 20, 2011 at 2:43 PM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with
SVG.
In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot.
For
example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
What it needs to visualize GIS data is a library that lets you draw freely. On the other hand a charting library would let you enter data for a set of series and would draw various types of charts accordingly. When trying to use a charting library to visualize GIS data (for the rich functionality they offer), most of the time we would have to hack the library.
For example POINT, MULTIPOINT and LINESTRING can be drawn with scatter charts and line charts. However to draw a MULTILINESTRING with two LINESTRINGs you'll have to draw 2 series giving them the same series name and same color, effectively hacking the library. The problem is with legends, legend would show two entries. The case gets worse when it comes to POLYGONS and MULTIPOLYGONS, worst when these have inner rings :(
Thats why I had to give up flot and settle for SVG, in particular jQuery SVG, which gives control over what is being drawn. However now I have to manage a number of features such as zooming, panning, tooltips with my own code.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
It certainly is nice to let the user save the charts/visualizations. I found [1] when looking for a solution. But I am yet to try that out.
On Fri, May 20, 2011 at 12:15 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 2:43 PM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot. For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
What it needs to visualize GIS data is a library that lets you draw freely. On the other hand a charting library would let you enter data for a set of series and would draw various types of charts accordingly. When trying to use a charting library to visualize GIS data (for the rich functionality they offer), most of the time we would have to hack the library. For example POINT, MULTIPOINT and LINESTRING can be drawn with scatter charts and line charts. However to draw a MULTILINESTRING with two LINESTRINGs you'll have to draw 2 series giving them the same series name and same color, effectively hacking the library. The problem is with legends, legend would show two entries. The case gets worse when it comes to POLYGONS and MULTIPOLYGONS, worst when these have inner rings :( Thats why I had to give up flot and settle for SVG, in particular jQuery SVG, which gives control over what is being drawn. However now I have to manage a number of features such as zooming, panning, tooltips with my own code.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
Wouldn't it be possible to write a sort of flot plugin for your case? Maybe thats even the easier way, than to program zooming, panning, tooltips etc. yourself. Then I could also use flot for my statistics page :D
It certainly is nice to let the user save the charts/visualizations. I found [1] when looking for a solution. But I am yet to try that out. -- Thanks and Regards, Madhura Jayaratne
[1] http://stackoverflow.com/questions/2483919/how-to-save-svg-canvas-to-local-f...
What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Phpmyadmin-devel mailing list Phpmyadmin-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/phpmyadmin-devel
On Fri, May 20, 2011 at 4:27 PM, Tyron Madlener tyronx@gmail.com wrote:
On Fri, May 20, 2011 at 12:15 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 2:43 PM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and
the
graphs are rich in quality. However you get less control over the
plot.
For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
What it needs to visualize GIS data is a library that lets you draw
freely.
On the other hand a charting library would let you enter data for a set
of
series and would draw various types of charts accordingly. When trying to use a charting library to visualize GIS data (for the rich functionality they offer), most of the time we would have to hack the library. For example POINT, MULTIPOINT and LINESTRING can be drawn with scatter charts and line charts. However to draw a MULTILINESTRING with two LINESTRINGs you'll have to draw 2 series giving them the same series name and same color, effectively hacking the library. The problem is with legends, legend would show two entries. The case gets worse when it comes
to
POLYGONS and MULTIPOLYGONS, worst when these have inner rings :( Thats why I had to give up flot and settle for SVG, in particular jQuery SVG, which gives control over what is being drawn. However now I have to manage a number of features such as zooming, panning, tooltips with my
own
code.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
Wouldn't it be possible to write a sort of flot plugin for your case? Maybe thats even the easier way, than to program zooming, panning, tooltips etc. yourself. Then I could also use flot for my statistics page :D
Nice idea :) But that would most probably amount to re-writing flot altogether. The thing is flot is not designed to draw shapes and all. IMO handling zooming, panning and tooltips with SVG is far easier than that :)
On Fri, May 20, 2011 at 4:47 PM, Madhura Jayaratne madhura.cj@gmail.comwrote:
On Fri, May 20, 2011 at 4:27 PM, Tyron Madlener tyronx@gmail.com wrote:
On Fri, May 20, 2011 at 12:15 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 2:43 PM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for
me.
So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and
the
graphs are rich in quality. However you get less control over the
plot.
For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at
all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's
summarize
what every project needs and try to find viable solution.
What it needs to visualize GIS data is a library that lets you draw
freely.
On the other hand a charting library would let you enter data for a set
of
series and would draw various types of charts accordingly. When trying
to
use a charting library to visualize GIS data (for the rich functionality they offer), most of the time we would have to hack the library. For example POINT, MULTIPOINT and LINESTRING can be drawn with scatter charts and line charts. However to draw a MULTILINESTRING with two LINESTRINGs you'll have to draw 2 series giving them the same series
name
and same color, effectively hacking the library. The problem is with legends, legend would show two entries. The case gets worse when it
comes to
POLYGONS and MULTIPOLYGONS, worst when these have inner rings :( Thats why I had to give up flot and settle for SVG, in particular jQuery SVG, which gives control over what is being drawn. However now I have to manage a number of features such as zooming, panning, tooltips with my
own
code.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
Wouldn't it be possible to write a sort of flot plugin for your case? Maybe thats even the easier way, than to program zooming, panning, tooltips etc. yourself. Then I could also use flot for my statistics page :D
Nice idea :) But that would most probably amount to re-writing flot altogether. The thing is flot is not designed to draw shapes and all. IMO handling zooming, panning and tooltips with SVG is far easier than that :)
-- Thanks and Regards,
Madhura Jayaratne
Hi Tyron,
Btw jQuery-SVG already has an extension for graphing. Pls have a look at the Graphing section of jQuery-SVG[1] and jQuery SVG Graphing Reference section[2] to see whether it suffices for your needs.
On Fri, May 20, 2011 at 4:44 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 4:47 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 4:27 PM, Tyron Madlener tyronx@gmail.com wrote:
On Fri, May 20, 2011 at 12:15 PM, Madhura Jayaratne madhura.cj@gmail.com wrote:
On Fri, May 20, 2011 at 2:43 PM, Michal Čihař michal@cihar.com wrote:
Hi
Dne Wed, 18 May 2011 18:01:15 +0530 Madhura Jayaratne madhura.cj@gmail.com napsal(a):
I did it as a test run and it is not finalized. Unfortunately I can't get flot to draw polygons with inner rings and that was a dead end for me. So right now I'm looking into generating all the GIS visualizations with SVG. In particular I am trying to generate them with jQuery-SVG.
Well, I agree that flot makes the life very easy for developers and the graphs are rich in quality. However you get less control over the plot. For example with SVG, I can manipulate each elements in the plot, but in flot that ability is limited to few events they have exposed. I'm not sure how this applies in your case, you might not want to manipulate it at all.
Okay, I think we should use as few graphing libraries as possible, ideally only one, but I'm not sure if it is possible. So let's summarize what every project needs and try to find viable solution.
What it needs to visualize GIS data is a library that lets you draw freely. On the other hand a charting library would let you enter data for a set of series and would draw various types of charts accordingly. When trying to use a charting library to visualize GIS data (for the rich functionality they offer), most of the time we would have to hack the library. For example POINT, MULTIPOINT and LINESTRING can be drawn with scatter charts and line charts. However to draw a MULTILINESTRING with two LINESTRINGs you'll have to draw 2 series giving them the same series name and same color, effectively hacking the library. The problem is with legends, legend would show two entries. The case gets worse when it comes to POLYGONS and MULTIPOLYGONS, worst when these have inner rings :( Thats why I had to give up flot and settle for SVG, in particular jQuery SVG, which gives control over what is being drawn. However now I have to manage a number of features such as zooming, panning, tooltips with my own code.
I think for charts, it would be nice to save them, but that does not seem to work with neither flot nor jQuery-SVG.
Wouldn't it be possible to write a sort of flot plugin for your case? Maybe thats even the easier way, than to program zooming, panning, tooltips etc. yourself. Then I could also use flot for my statistics page :D
Nice idea :) But that would most probably amount to re-writing flot altogether. The thing is flot is not designed to draw shapes and all. IMO handling zooming, panning and tooltips with SVG is far easier than that :) -- Thanks and Regards, Madhura Jayaratne
Hi Tyron, Btw jQuery-SVG already has an extension for graphing. Pls have a look at the Graphing section of jQuery-SVG[1] and jQuery SVG Graphing Reference section[2] to see whether it suffices for your needs.
Oh nice. I'll check it out.
-- Thanks and Regards, Madhura Jayaratne
[1] http://keith-wood.name/svg.html%C2%A0(See the Graphing section) [2] http://keith-wood.name/svggraphRef.html
-
Madhura Jayaratne -
Michal Čihař -
Tyron Madlener