Hi,
Thank you very much for Tokyo air and earth wind application. Can you please point me, how to run a JSON implementation of Tokyo air app. I can't able to run postgres based implementation, it saying no data found if I am running

 node server.js 8080 postgres://postgres:postgres@localhost:5432/air http://www.kankyo.metro.tokyo.jp

while initial data scrapping it gives error of no data found, the url

http://www.kankyo.metro.tokyo.jp/p160.cgi?no2===1==2====2=

scrapping is subjected is linked to 'sorry no data found'.

I am looking forward to apply, air null wind map for high resolution gfs (from weather Research Forecast (WRF) model downscaling to 1 km resolution) wind data which is used in earth.null.wind application for a urban area.

I think, clean json implementation of earth.null.wind is overweight for a urban level visualization. Please help.

Hi, i was testing the project to load a local topojson of another country, anoter points ot stations and local meteorology data.

This is what a did:

• i truncated and inserted local stations data, stations with local geom x,y,
• i truncated and inserted local meteo data at samples referencing station id,
• i changed the public/data/tokyo-topo.json with my own tokyo-topo.json (same name, different geometry)

but i got this error:

nodejs server.js 8080 postgres://postgres:postgres@localhost/air
============================================================
2016-09-27T21:38:52.052Z - Starting
2016-09-27T21:38:52.226Z - info: Listening on port 8080...

module.js:485
    throw err;
          ^
SyntaxError: /opt/air/station-data.json: Unexpected number
    at Object.parse (native)
    at Object.Module._extensions..json (module.js:482:27)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/opt/air/server.js:21:20)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)

my /opt/air/station-data.json:

[
        [1, "1", "1", -54.750000, -67.750000],
        [2, "2, "2", -54.750000, -67.750000],
        [3, "3", "3", -54.750000, -67.250000],
        [4, "4", "4",  -54.750000, -66.750000],
        [5, "5", "5", -54.750000, -66.250000],
        [6, "6", "6", -54.750000, -65.750000],
        [7, "7", "7", -54.750000, -65.250000],
        [8, "8", "8", -54.750000, -64.250000],
        [9, "9", "9", -54.250000, -68.250000],
        [10, "10", "10", -54.250000, -67.750000],
        [11, "11", "11", -54.250000, -67.250000]
]

topojson:
https://github.com/vlasvlasvlas/topojsons/blob/master/map-argentina.topojson

what could this be?

Hi,

I am trying to get the air application running locally. Everything goes well, except launching the server. I am not sure what to use as . I filled in the url that is mentioned in the README where the data comes from, and I notice in the server output that it is trying to connect to http://www.kankyo.metro.tokyo.jp/p160.cgi?no2===1==2====2= but that results in a custom "page not found", and the server throws an "error: no data found". When I point my browser to the local application, it says "-1 Cannot load resource: /data/wind/current"

How should I go about this?

Thanks!

function inverseDistanceWeighting(points, k) {

    // Build a space partitioning tree to use for quick lookup of closest neighbors.
    var tree = kdTree(points, 2, 0);

    // Define special scratch objects for intermediate calculations to avoid unnecessary array allocations.
    var temp = [];
    var nearestNeighbors = [];
    for (var i = 0; i < k; i++) {
        nearestNeighbors.push({});
    }

    function clear() {
        for (var i = 0; i < k; i++) {
            var n = nearestNeighbors[i];
            n.point = null;
            n.distance2 = Infinity;
        }
    }

    // Return a function that interpolates a vector for the point (x, y) and stores it in "result".
    return function(x, y, result) {
        var weightSum = 0;

        clear();  // reset our scratch objects

// temp[0] = x;
// temp[1] = y;
temp = result;

        nearest(temp, tree, nearestNeighbors);  // calculate nearest neighbors

        // Sum up the values at each nearest neighbor, adjusted by the inverse square of the distance.
        for (var i = 0; i < k; i++) {
            var neighbor = nearestNeighbors[i];
            var sample = neighbor.point[2];
            var d2 = neighbor.distance2;
            if (d2 === 0) {  // (x, y) is exactly on top of a point.
                //result[0] = sample[0];
                //result[1] = sample[1];
            	result = sample;
                return result;
            }
            var weight = 1 / d2;
            //temp[0] = sample[0];
            //temp[1] = sample[1];
            temp = sample;
            result = addVectors(result, scaleVector(temp, weight));
            weightSum += weight;
        }

        // Divide by the total weight to calculate an average, which is our interpolated result.
        //return scaleVector(result, 1 / weightSum);
        return result/weightSum;
    }
}

I'm a student. I'm so sorry that how amateur am I. I don't know how to solve the temp and the "result = addVectors(result, scaleVector(temp, weight));" Can you tell me how to use inverseDistanceWeighting when result is a number not a vector?

HI，very appreciate it that you develop this project, and I am trying to build a version of the Tokyo Wind Map on my machine. I have followed the steps in the readme.md, unfortunately some errors come up, could you help me to solve this problem. Here is the error.

2015-11-08T06:53:36.783Z - Starting
2015-11-08T06:53:37.397Z - info: Listening on port 8030...
2015-11-08T06:53:37.419Z - info: Preparing tables...
2015-11-08T06:53:37.423Z - info: Persisting...
2015-11-08T06:53:37.493Z - info: get: www.taiki.kankyo.metro.tokyo.jp/cgi-bin/bunpu1/p160.cgi?no2===1==2====2=
2015-11-08T06:53:37.499Z - info: get: www.taiki.kankyo.metro.tokyo.jp/cgi-bin/bunpu1/p160.cgi?no2===2==2====2=
2015-11-08T06:53:37.516Z - error: Error: connect ECONNREFUSED
at exports._errnoException (util.js:746:11)
at TCPConnectWrap.afterConnect as oncomplete
Potentially unhandled rejection [2] Error: connect ECONNREFUSED
at exports._errnoException (util.js:746:11)
at TCPConnectWrap.afterConnect as oncomplete
Thanks a lot!

Please let know that this works great with nodejs v6

i tried the npm install with debian wheezy + nodejs v4 and got loads of error (node-gyp rebuild, + )

Hi @cambecc,

Our team hacked together a flow visualization of bird migration over the Netherlands and Belgium recorded by weather radars. It is online at:

http://enram.github.io/bird-migration-flow-visualization/viz/

Source code is on GitHub.

We were inspired by air and used parts of your code, for which we would like to thank you.

Cheers,

LifeWatch INBO team (@peterdesmet, @bartaelterman, @kazijn)

Hi Cambecc,

I am trying to setup a version of the Tokyo Wind Map on my machine. I have followed the steps in the description unfortunately I can't get it running properly. When I start the server I get the error 500 Internal Server Error.

When I look at the console, it gives an error:
"NetworkError: 500 Internal Server Error - http://localhost:8080/data/wind/current"

I started the server using this command:
node server.js 8080 postgres://postgres:12345@localhost:5432/air http://www.taiki.kankyo.metro.tokyo.jp

It does give back some errors:

2015-06-03T08:48:26.369Z - error: error: password authentication failed for user "postgres"
    at Connection.parseE (/Users/martinrisseeuw/Dropbox/Development projects/Windmap/node_modules/pg/lib/connection.js:526:11)
    at Connection.parseMessage (/Users/martinrisseeuw/Dropbox/Development projects/Windmap/node_modules/pg/lib/connection.js:371:17)
    at Socket.<anonymous> (/Users/martinrisseeuw/Dropbox/Development projects/Windmap/node_modules/pg/lib/connection.js:86:20)
    at Socket.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:764:14)
    at Socket.emit (events.js:92:17)
    at emitReadable_ (_stream_readable.js:426:10)
    at emitReadable (_stream_readable.js:422:5)
    at readableAddChunk (_stream_readable.js:165:9)
    at Socket.Readable.push (_stream_readable.js:127:10)
2015-06-03T08:48:26.370Z - info: 127.0.0.1 - - GET /data/wind/current HTTP/1.1 "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Firefox/38.0" http://localhost:8080/ - gzip, deflate

I hope you can help me. I would like to use your project as a starting point for displaying flow and water quality.

Best,

Martin

Hello @cambecc
I used your code and merged to my OpenLayers project, everything was fine. But there was a projection problem after I upgrading D3 from version 3 to version 4.
There is my StackOverflow question
I maybe missed something.
Great thanks if you can reply or anyone can solve my confusion!

Hi Mr Cameron,

When selecting the overlay wind velocity, there is a difference in both values?