dhis2-devs team mailing list archive

[Jan Henrik Øverland <janhenrik.overland@xxxxxxxxx>]

Google Chrome has by far the strongest Javascript engine and SVG renderer,
you can really feel the difference.

These things are improved and released every month, so I don't think it will
be a problem in the long run.

Btw, I am going to test the latest browsers right now.


On Thu, Nov 12, 2009 at 6:23 PM, Jason Pickering <
jason.p.pickering@xxxxxxxxx> wrote:

> Strange. This behaviour I observed was on a brand new laptop running
> the latest version of Firefox on Linux.
>
> Mileage may vary.
>
>
>
> On Thu, Nov 12, 2009 at 5:51 PM, Knut Staring <knutst@xxxxxxxxx> wrote:
> > On Wed, Nov 11, 2009 at 6:14 PM, Knut Staring <knutst@xxxxxxxxx> wrote:
> >>
> >> Not too promising:
> >> "If you expect the number of your point to grow beyond ~100, you'll
> >> definitely be better off using WMS (especially if your users are on
> Internet
> >> Explorer)"
> >
> > Actually, this 6 month old comment may be a bit outdated, seeing as the
> > newest browsers handle Javascript a hell of a lot better than a year or
> two
> > ago.
> >
> > I just tried your file with Opera 10 and Firefox 3.5 using
> > http://openlayers.org/dev/examples/vector-formats.html, and it had no
> > problem handling it at all.
> > So in situations where you can tell people to use a modern browser (even
> IE6
> > could in fact handle your 1511 features, just takes forever to load...
> and
> > is very sluggish) we may be ok.
> > I still think having an alternative with either static or dynamically
> > generated SLDs is needed (but not in all situations).
> > Knut
> >
> >
> >
> >>
> >> http://openlayers.org/pipermail/users/2009-March/010997.html
> >> On Wed, Nov 11, 2009 at 5:48 PM, Knut Staring <knutst@xxxxxxxxx> wrote:
> >>>
> >>> Given that your json file is less than 600 k, it seems to me that it is
> >>> the number of objects in the DOM that are a problem rather than the
> file
> >>> size...which would not be the case with WMS of course, but then, less
> >>> immediate interaction
> >>>
> >>> On Wed, Nov 11, 2009 at 5:38 PM, Knut Staring <knutst@xxxxxxxxx>
> wrote:
> >>>>
> >>>> On Wed, Nov 11, 2009 at 5:21 PM, Jason Pickering
> >>>> <jason.p.pickering@xxxxxxxxx> wrote:
> >>>>>
> >>>>> In my spare time sitting in a long meeting, I have been taking  a
> look
> >>>>> at the GIS module in a bit more detail. I have a few comments.
> >>>>>
> >>>>> My source data file is here..
> >>>>>
> >>>>>
> >>>>>
> http://zamdhis.dynalias.org/geoserver/wfs?request=GetFeature&typename=who:HFC_GPS_ZAMBIA&outputformat=json&srsname=EPSG:4326
> >>>>>
> >>>>> This is the GeoJSON output of facilities in Zambia (those that are
> >>>>> available).
> >>>>>
> >>>>> Now, because we are using the DHIS 1.4 naming convention, where a
> >>>>> prefix of the province has been added to the name of the facility.
> The
> >>>>> basic problem here is that there are differences between the names of
> >>>>> the facilities in the DB and the names in the GeoJSON files. Luckily,
> >>>>> there is a common code that would allow the data to be matched, but I
> >>>>> can only match the JSON file on the name of the facility. Possible
> >>>>> solutions? Change the source file is an option. Allowing matching on
> >>>>> another field in the database would be a better option perhaps.
> >>>>>
> >>>>> Also, since there are some 1500 points or so in the file, the browser
> >>>>> "greys out" sometimes, which seems really to be a performance issue.
> >>>>> Obviously, we cannot simplify point files, which can speed up the
> >>>>> performance of polygon layers in the client. Thoughts?
> >>>>
> >>>> You can actually simplify even points by including fewer decimals for
> >>>> each coordinate. That may be acceptable in some situations, but
> probably
> >>>> quite undesirable in others - and I think it underscores that we need
> to
> >>>> bring the OpenHealth-FP solution of generating SLDs to feed to
> Geoserver
> >>>> back in as a supplement for cases where GeoJSON are not suitable. It
> would
> >>>> be great to avoid that, but not sure if it is possible when we deal
> with
> >>>> serious amounts of data.
> >>>> Knut
> >>>>
> >>>>>
> >>>>> Regards,
> >>>>> jason
> >>>>>
> >>>>> _______________________________________________
> >>>>> Mailing list: https://launchpad.net/~dhis2-devs<https://launchpad.net/%7Edhis2-devs>
> >>>>> Post to     : dhis2-devs@xxxxxxxxxxxxxxxxxxx
> >>>>> Unsubscribe : https://launchpad.net/~dhis2-devs<https://launchpad.net/%7Edhis2-devs>
> >>>>> More help   : https://help.launchpad.net/ListHelp
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Cheers,
> >>>> Knut Staring
> >>>
> >>>
> >>>
> >>> --
> >>> Cheers,
> >>> Knut Staring
> >>
> >>
> >>
> >> --
> >> Cheers,
> >> Knut Staring
> >
> >
> >
> > --
> > Cheers,
> > Knut Staring
> >
>
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