On Wed, Jan 13, 2016 at 2:02 PM, OmPrakash Muppirala <bigosma...@gmail.com>
wrote:
> I took the coordinates from your earlier code and tried it out:
>
> override protected function createMap():void
> {
> var mc:MercatorProjection = new MercatorProjection();
> mc.initialize();
> var a:Array = [
> [151.25715360000004, -33.743317043500042 ],
> [151.25985827199997,-33.743840223500001 ],
> [151.26121619200012, -33.74746011849993 ],
> [151.269228, -33.74990100849999 ],
> [151.26887100800002, -33.757243991500047],
> [ 151.27524460799998, -33.756977721 ],
> [ 151.28052790400011,-33.75872719199981 ],
> [ 151.27875936, -33.768415808499981 ],
> [151.27282256000012, -33.767621917999975 ],
> [ 151.27024985600008,-33.77462350199994 ],
> [ 151.27552054400007, -33.779516363499738 ],
> [151.27530051200017, -33.781854430499834 ],
> [ 151.26530544000002,-33.780174667499921 ],
> [ 151.26095520000001, -33.777029796999898 ],
> [151.259648416, -33.779054695999776 ],
> [ 151.25597475200004,-33.779087477999894 ],
> [ 151.25556144000006, -33.783829046499761 ],
> [151.24337900800003, -33.781951999499825 ],
> [ 151.23829500800002,-33.778761008499828 ],
> [ 151.23245721600017, -33.762912705999895 ],
> [151.23388588800003, -33.754605225500029 ],
> [ 151.24911699200015,-33.756704993999904 ],
> [ 151.24983971200004, -33.752049450499953 ],
> [151.24830732800024, -33.751826433000019 ],
> [ 151.24833936000005,-33.748172997499921 ],
> [ 151.25159628799997, -33.74994213399998 ],
> [151.25054374400008, -33.746457899499944 ],
> [ 151.25377328000013,-33.746925597999962 ],
> [ 151.25369952000005, -33.74283635799992 ],
> [151.25715360000004, -33.743317043500042 ]]
> this.graphics.clear();
> this.graphics.lineStyle(2,0xFF0000);
> this.graphics.beginFill(0x999999);
> for(var i:int = 0; i < a.length-1; i++)
> {
> var ltlg:Array = a[i];
> var p:Point = new Point();
> p = mc.project(ltlg[0],ltlg[1], p);
> this.graphics.lineTo(p.x,p.y);
> }
> this.graphics.endFill();
> }
>
> The resultant shape looks pretty much like a straight line, though.
>
> Are you sure 151.25715360000004, -33.743317043500042 is actually a valid
> lat/long co-ordinate? I am not able to plot it on google maps.
>
>
Duh, it is long/lat and not lat/long. So yes, the co-ordinates are valid
and can be seen on Google Maps.
I will continue to experiment with this when I get some time.
Thanks,
Om
> Thanks,
> Om
>
>
> On Wed, Jan 13, 2016 at 1:31 PM, OmPrakash Muppirala <bigosma...@gmail.com
> > wrote:
>
>> Give me the list of lat/long co-ordinates and the end result shape they
>> should look like. I will try out a few things and see we can make this
>> work.
>>
>> Thanks,
>> Om
>>
>> On Wed, Jan 13, 2016 at 7:36 AM, OmPrakash Muppirala <
>> bigosma...@gmail.com> wrote:
>>
>>>
>>> On Jan 13, 2016 4:36 AM, "Deepak MS" <megharajdee...@gmail.com> wrote:
>>> >
>>> > Ok. But it isn't converting lat\long values to expected path data
>>> > coordinates I believe.
>>>
>>> What's happening? Can you post the relevant code and output?
>>>
>>> Thanks,
>>> Om
>>>
>>> >
>>> > On Wed, Jan 13, 2016 at 5:37 PM, OmPrakash Muppirala <
>>> bigosma...@gmail.com>
>>> > wrote:
>>> >
>>> > > Yes, it is lat and long. Out is the output point which should get
>>> updated
>>> > > during the projection.
>>> > >
>>> > > Thanks,
>>> > > Om
>>> > > On Jan 13, 2016 3:10 AM, "Deepak MS" <megharajdee...@gmail.com>
>>> wrote:
>>> > >
>>> > > > Thanks Om.
>>> > > >
>>> > > > I tried that library with following code:
>>> > > > var mc:MercatorProjection = new MercatorProjection();
>>> > > > for(var i:int = 0; i < a.length; i++) // a here is
>>> array of
>>> > > > arrays - [ [ 151.25, -33.74 ],[ 151.25, -33.74 ] ......]
>>> > > > {
>>> > > > var ltlg:Array = a[i];
>>> > > > var p:Point = mc.project(ltlg[0],ltlg[1], new
>>> Point());
>>> > > > //p.x will always be same as lat value - 151.25
>>> and p.y
>>> > > > will always be NaN
>>> > > >
>>> > > > }
>>> > > >
>>> > > > I looked at MercatorProjection.project() method:
>>> > > > override public function project(lam:Number, phi:Number,
>>> out:Point):Point
>>> > > > {
>>> > > > if (spherical) { //spherical = false
>>> > > > out.x = scaleFactor * lam; //scaleFactor = 1
>>> > > > out.y = scaleFactor *
>>> > > Math.log(Math.tan(MapMath.QUARTERPI +
>>> > > > 0.5 * phi));
>>> > > > } else {
>>> > > > out.x = scaleFactor * lam;
>>> > > > out.y = -scaleFactor * Math.log(MapMath.tsfn(phi,
>>> > > > Math.sin(phi), e));
>>> > > > }
>>> > > > return out;
>>> > > > }
>>> > > >
>>> > > > I'm not sure what Iam, phi and out parameters are. I assumed Iam
>>> is lat
>>> > > and
>>> > > > phi would be lng. out is used to return the value. I don't know
>>> why is it
>>> > > > an input parameter here as out itself is the return value.
>>> > > >
>>> > > > Am I passing lat, lng values correctly to project() ?
>>> > > >
>>> > > >
>>> > > >
>>> > > >
>>> > > > On Wed, Jan 13, 2016 at 1:09 PM, OmPrakash Muppirala <
>>> > > bigosma...@gmail.com
>>> > > > >
>>> > > > wrote:
>>> > > >
>>> > > > > Moving thread to dev@. Users@ in bcc in case someone else is
>>> > > interested
>>> > > > > in
>>> > > > > this.
>>> > > > >
>>> > > > > The d in the path node is a stringified set of points which are
>>> > > connected
>>> > > > > by lines. M is for moveTo, L is for lineTo and Z signifies
>>> closing the
>>> > > > > path back to the first point.
>>> > > > >
>>> > > > > Each country (or region) has its own shape which is denoted by
>>> the d
>>> > > > > string. The series of path objects is sufficient to draw all the
>>> > > > countries
>>> > > > > using a stroke and a fill.
>>> > > > >
>>> > > > > Looking at your coordinates, it looks like a closed polygon.
>>> > > > > You might want to try to use Mercator projection to project the
>>> lat
>>> > > long
>>> > > > > coordinates to cartesian coordinates.
>>> > > > > Here is a very straightforward implementation of this in AS3:
>>> > > > > *
>>> > > > >
>>> > > >
>>> > >
>>> https://bitbucket.org/gka/as3-proj/src/ec91cdd098a15ab1e2cbf5bbd3a3221a36507685/net/vis4/map/proj/MercatorProjection.as?at=default&fileviewer=file-view-default
>>> > > > > <
>>> > > > >
>>> > > >
>>> > >
>>> https://bitbucket.org/gka/as3-proj/src/ec91cdd098a15ab1e2cbf5bbd3a3221a36507685/net/vis4/map/proj/MercatorProjection.as?at=default&fileviewer=file-view-default
>>> > > > > >*
>>> > > > >
>>> > > > > Basically for each lat/long co-ordinate in your 'coordinates'
>>> array,
>>> > > call
>>> > > > > MercatorProjection.project(), which should give you a Point
>>> object.
>>> > > Use
>>> > > > > these series of Points to draw a shape, which represents your
>>> > > > State/region.
>>> > > > >
>>> > > > > Do let me know if you need any further help
>>> > > > >
>>> > > > > Thanks,
>>> > > > > Om
>>> > > > > On Jan 12, 2016 10:06 PM, "Deepak MS" <megharajdee...@gmail.com>
>>> > > wrote:
>>> > > > >
>>> > > > > > Moving following conversation to this separate thread.
>>> > > > > >
>>> > > > > >
>>> > > > > >
>>> > > > >
>>> > > >
>>> > >
>>> http://apache-flex-development.2333347.n4.nabble.com/FlexJS-US-States-Map-example-pure-AS3-td48006.html
>>> > > > > >
>>> > > > > > Hi Om,
>>> > > > > > I had one question.
>>> > > > > > I could see the following path in the worldmap.xml file:
>>> > > > > > <path fill="#CEE3F5" stroke="#6E6E6E" stroke-width="0.4"
>>> id="UM"
>>> > > > > > d="M25.4,206.4 L25.4,206.4 L25.3,206.4 L25.4,206.4 Z">
>>> > > > > > <desc>
>>> > > > > > <name>United States Minor Outlying Islands</name>
>>> > > > > > <labelrank>5</labelrank>
>>> > > > > > <country-abbrev>U.S. MOI</country-abbrev>
>>> > > > > > <subregion>Seven seas (open ocean)</subregion>
>>> > > > > > <region-wb>East Asia & Pacific</region-wb>
>>> > > > > > <iso-a3>UMI</iso-a3>
>>> > > > > > <iso-a2>UM</iso-a2>
>>> > > > > > <woe-id>28289407</woe-id>
>>> > > > > > <continent>North America</continent>
>>> > > > > > <hc-middle-x>0.57</hc-middle-x>
>>> > > > > > <hc-middle-y>0.58</hc-middle-y>
>>> > > > > > <hc-key>um</hc-key>
>>> > > > > > <hc-a2>UM</hc-a2>
>>> > > > > > </desc>
>>> > > > > > </path>
>>> > > > > >
>>> > > > > > What is the path data in there?
>>> > > > > >
>>> > > > > > I would be getting the boundary data in form of geojson which
>>> would
>>> > > > have
>>> > > > > > latitude\longitude points. Something like this:
>>> > > > > >
>>> > > > > > { "type": "Feature", "properties": { "BrickCode_": "21000",
>>> "State":
>>> > > > > "NSW",
>>> > > > > > "ML_Code": "ML108" }, "geometry": { "type": "Polygon",
>>> > > "coordinates": [
>>> > > > > [ [
>>> > > > > > 151.25715360000004, -33.743317043500042 ], [
>>> 151.25985827199997,
>>> > > > > > -33.743840223500001 ], [ 151.26121619200012,
>>> -33.74746011849993 ], [
>>> > > > > > 151.269228, -33.74990100849999 ], [ 151.26887100800002,
>>> > > > > -33.757243991500047
>>> > > > > > ], [ 151.27524460799998, -33.756977721 ], [ 151.28052790400011,
>>> > > > > > -33.75872719199981 ], [ 151.27875936, -33.768415808499981 ], [
>>> > > > > > 151.27282256000012, -33.767621917999975 ], [
>>> 151.27024985600008,
>>> > > > > > -33.77462350199994 ], [ 151.27552054400007,
>>> -33.779516363499738 ], [
>>> > > > > > 151.27530051200017, -33.781854430499834 ], [
>>> 151.26530544000002,
>>> > > > > > -33.780174667499921 ], [ 151.26095520000001,
>>> -33.777029796999898 ], [
>>> > > > > > 151.259648416, -33.779054695999776 ], [ 151.25597475200004,
>>> > > > > > -33.779087477999894 ], [ 151.25556144000006,
>>> -33.783829046499761 ], [
>>> > > > > > 151.24337900800003, -33.781951999499825 ], [
>>> 151.23829500800002,
>>> > > > > > -33.778761008499828 ], [ 151.23245721600017,
>>> -33.762912705999895 ], [
>>> > > > > > 151.23388588800003, -33.754605225500029 ], [
>>> 151.24911699200015,
>>> > > > > > -33.756704993999904 ], [ 151.24983971200004,
>>> -33.752049450499953 ], [
>>> > > > > > 151.24830732800024, -33.751826433000019 ], [
>>> 151.24833936000005,
>>> > > > > > -33.748172997499921 ], [ 151.25159628799997,
>>> -33.74994213399998 ], [
>>> > > > > > 151.25054374400008, -33.746457899499944 ], [
>>> 151.25377328000013,
>>> > > > > > -33.746925597999962 ], [ 151.25369952000005,
>>> -33.74283635799992 ], [
>>> > > > > > 151.25715360000004, -33.743317043500042 ] ] ] } }
>>> > > > > >
>>> > > > > > I'm sure that we cannot use lat\lng points directly in path
>>> data.
>>> > > But I
>>> > > > > > want to know based on what can we convert these data points to
>>> path
>>> > > > data.
>>> > > > > >
>>> > > > >
>>> > > >
>>> > >
>>>
>>
>>
>
