Progressive loader

[Nick Rabinowitz]

Hello all -

This has come up a couple of times on the list, so I wanted to note that I've added a new loader for progressive loading (i.e. loading blocks of data based on the position of the timeline), now in the SVN trunk. It's basically a wrapper for other remote loaders, so it can use any existing type of loader (jsonp, json_string, kml, etc), as long as you have either a service that can take a start and end date (e.g. /mydata.json?start=2009-11-05&end=2009-11-07) or static files covering regular time intervals (e.g. data2009-11-05.json, data2009-11-06.json, etc). Basic syntax within TimeMap.init() looks like this:

  datasets: [

        {

            title: "Progressive JSONP Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "jsonp",

                // options for the loader you want, including a URL with placeholder strings

                url: "http://www.test.com/getsomejson.php?start=[start]&end=[end]callback="

            }

        }

    ]

I added an example page at http://timemap.googlecode.com/svn/trunk/examples/progressive.html , which progressively loads data from a random data generation service.

I hope this is useful - enjoy!

-Nick

[chao]

Hi Nick,

Could you give an example that for 

static files covering regular time intervals (e.g. data2009-11-05.json, data2009-11-06.json, etc)

for example i store all my data in a folder called data

the format will be :

 datasets: [

        {

            title: "Progressive JSON Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "json_",

                // options for the loader you want, including a URL with placeholder strings

                url: "/data" //? not sue

            }

        }

    ]

[Chao Liu]

Hi Nick,

Thank you for your reply and I still have a small confuse:

datasets: [

        {

            title: "Progressive JSONP Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "jsonp",

                // options for the loader you want, including a URL with placeholder strings

                url: "http://www.test.com/getsomejson.php?start=[start]&end=[end]callback="

            }

        }

    ]

I am test my code under chrome, and for some security reason,chrome doesn't allow to load files locally, so I want to know whether it's possible to load the local file?

something not like url: "http://www.test.com/getsomejson.php?start=[start]&end=[end]callback=" 

but url:"/mydata.json?start=[start]&end=[end]"

And what doese "static files covering regular time intervals (e.g. data2009-11-05.json, data2009-11-06.json, etc)." mean?

 I do have my data ordered by date: 2012-08-01.json,2012-08-02.json,2012-08-03.json... 

and how can I input the files?

so the question become how could I input a bunch of files with json format and each with date as file name into timemap?

the syntax will be?

datasets: [

        {

            title: "Progressive JSON Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "json_",

                // options for the loader you want, including a URL with placeholder strings

                url: "/mydatafolder?" 

            }

        }

    ]

On Mon, Aug 6, 2012 at 2:06 PM, chao <chao...@adaramedia.com> wrote:

Hi Nick,

Could you give an example that for 

static files covering regular time intervals (e.g. data2009-11-05.json, data2009-11-06.json, etc)

for example i store all my data in a folder called data

the format will be :

 datasets: [

        {

            title: "Progressive JSON Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "json_string",

                url: "/data?start=[start]&end=[end]" // this is the part I am not sure

            }

        }

    ]

 and for the json files, is that each one should have a start time? for example in file 2012-08-01.json

[

 { "title:":"point",

    "start": "2012-08-01",

    "point":{

      "lat": 1.342,

      "lon": 23.425

     },

{...},

{...},

{...},

{...}

]

Thank you so much. And the timemap project is really great! go bears!

 

On Saturday, November 7, 2009 5:22:14 PM UTC-8, Nick R wrote:

Hello all -

This has come up a couple of times on the list, so I wanted to note that I've added a new loader for progressive loading (i.e. loading blocks of data based on the position of the timeline), now in the SVN trunk. It's basically a wrapper for other remote loaders, so it can use any existing type of loader (jsonp, json_string, kml, etc), as long as you have either a service that can take a start and end date (e.g. /mydata.json?start=2009-11-05&end=2009-11-07) or static files covering regular time intervals (e.g. data2009-11-05.json, data2009-11-06.json, etc). Basic syntax within TimeMap.init() looks like this:

  datasets: [

        {

            title: "Progressive JSONP Dataset",

            type: "progressive",

            options: {

                // the loader type you really want

                type: "jsonp",

                // options for the loader you want, including a URL with placeholder strings

                url: "http://www.test.com/getsomejson.php?start=[start]&end=[end]callback="

            }

        }

    ]

I added an example page at http://timemap.googlecode.com/svn/trunk/examples/progressive.html , which progressively loads data from a random data generation service.

I hope this is useful - enjoy!

-Nick

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