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[Geotools-gt2-users] FW: Generating Map for set ofLat/Long Points
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From: Natarajan, S. <se...@pi...> - 2006-07-17 01:31:37
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Hi,
Now I generated a Map (jpeg Image) of just six point locations, I was
wondering how to specify the Title for the Map, North Arrow, and Scale
Bar etc...
Please find the attached code.
Thanks,
Senthil
-----Original Message-----
From: Parks, Aaron B. [mailto:ap...@rt...]=20
Sent: Tuesday, July 11, 2006 4:23 PM
To: geotools list; Natarajan, Senthil
Subject: RE: [Geotools-devel] [Geotools-gt2-users] Generating Map for
set ofLat/Long Points
Once you actually get the map in an image buffer you can spit out almost
any type of graphic using the JAI.=20
getMapPane() grabs my panel that has the buffer on it.
Your imports:
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.awt.Graphics2D;
Your code:
try {
int w =3D getMapPane().getWidth(), h =3D
getMapPane().getHeight();
BufferedImage image =3D new BufferedImage(w, h,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 =3D image.createGraphics();
getMapPane().paint(g2);
g2.dispose();
ImageIO.write(image, "jpeg", new
File("c:\\temp\\test.jpeg"));
} catch (Exception f) {
System.err.println(f);
}
AP
-----Original Message-----
From: geo...@li...
[mailto:geo...@li...] On Behalf Of David
Adler
Sent: Tuesday, July 11, 2006 3:54 PM
To: geotools list; Natarajan, Senthil
Subject: Re: [Geotools-devel] [Geotools-gt2-users] Generating Map for
set ofLat/Long Points
There is an snippet at http://geotools.codehaus.org/LiteRendering which=20
shows rendering to an image buffer.
I'm not sure if this helps if one wants to draw a nice map using the=20
various styles.
At 03:27 PM 7/11/2006, Adrian Custer wrote:
>On Tue, 2006-07-11 at 14:43 -0400, Natarajan, Senthil wrote:
> > Hi Adrian,
> > I ran your tutorial code, and I am getting these and working fine. I
> > was wondering how to generate the map; I need to get some map Image=20
> > file. How can we do that? Thanks,
> > Senthil
>
>Hey,
>
> Note that what you are trying to do is where i was two years
ago
> so it's reasonable. However, I'm still not able to answer your
> question. Geotools is really powerful but it's been built by
> people working from another end rather than from the user
needs
> side of things. So you want to do something really easy but it
> turns out to be impossibly hard. Sorry, that's the breaks.
>
> Also can you lay out the whole process you want to go through.
> helping you piecemeal like this is both stretching my
knowledge
> and confusing me. Are you going to want a map on screen or an
> image or on paper? Do you want to match other data files? Is
> this a one off effort or do you want to do it repeatedly?
>
> Finally, look at the uDig and the JUMP project / OpenJUMP. The
> latter may be able to help you out of the box^W download.
>
>Short answer:
> I don't know.
>
>Longer answer:
> It will depend on what geotools you are using, because the
> actual widget you use will vary. In 2.2 I think you are out of
> luck. In 2.0 and 2.1 there are some widgets in the legacy
module
> you can play with. In the current development tree there's
> apparently a widget working again.
>
> NOTA BENE! I'm not sure that even once you can *display* a map
> on screen, you'll then be able to get out any kind of graphic.
> You probably can, I just don't know how.
>
> I would suggest breaking your effort into three parts:
> 1) Build a file (say shapefile) that has the data you
> want
> 2) find a way to display the file (easy with uDig)
> 3) find a way to get an image (if that's what you
want)
> The first you can do with geotools by creating a feature and
> then saving to a shapefile data store. it's a bit complex but
> possible. The second is trivial with uDig. And the third, I
> think with JUMP. Eventually, uDig will do them all---if I can
do
> anything about it.
>
>okay, hope that helps, back to working on the docs,
>adrian
>
>
>On Tue, 2006-07-11 at 14:43 -0400, Natarajan, Senthil wrote:
> > Hi Adrian,
> > I ran your tutorial code, and I am getting these and working fine. I
> > was wondering how to generate the map; I need to get some map Image=20
> > file. How can we do that? Thanks,
> > Senthil
> >
> > Start of the output for the tutorial: CreateAFeature.
> >
> > The polygon is: POLYGON ((7 7, 6 9, 6 11, 7 12, 9 11, 11
12,
> > 13 11, 13 9, 11 7, 7 7))
> > Point feature type name is: pointfeature
> > Point feature type is: DefaultFeatureType [name=3Dpointfeature =
,
> > namespace=3Dhttp://www.opengis.net/gml , abstract=3Dfalse , ty=20
> > pes=3D(DefaultAttributeType [name=3Dthe_geom , type=3Dclass=20
> > com.vividsolutions.jts.geom.Point , nillable=3Dtrue, min=3D1,=20
> > max=3D1],Default AttributeType [name=3DCITYNAME , type=3Dclass=20
> > java.lang.String , nillable=3Dtrue, min=3D1, =
max=3D1],DefaultAttributeType
> > [name=3DCITYPOP , type=3Dclass java.lang.Double , nillable=3Dtrue, =
min=3D1,
max=3D1],)]
> > The point Feature is: Feature[
id=3Dfid-13dd332c:10c5ee1195a:-8000 ,
> > the_geom=3DPOINT (14 14) , CITYNAME=3DHometown , CITYPOP=3D 200000.0 =
]
> > The line Feature is: Feature[
id=3Dfid-13dd332c:10c5ee1195a:-7fff ,
> > the_geom=3DLINESTRING (5 5, 6 5, 6 6, 7 6, 7 7, 8 7, 8
> > 8) , RIVERNAME=3DThe big fat greasy limpopo ]
> > The linearRing Feature is: Feature[
id=3Dfid-13dd332c:10c5ee1195a:-7ffe ,
> > the_geom=3DLINEARRING (7 7, 6 9, 6 11, 7 12, 9 11, 11 1
> > 2, 13 11, 13 9, 11 7, 7 7) ]
> > The polygon Feature is: Feature[
id=3Dfid-13dd332c:10c5ee1195a:-7ffd ,
> > the_geom=3DPOLYGON ((7 7, 6 9, 6 11, 7 12, 9 11, 11 12,
> > 13 11, 13 9, 11 7, 7 7)) , MAXELEVATION=3D1654.0 , =
ISLANDNAME=3DGreen
> > Island ]
> >
> > End of the tutorial output.
> >
> >
> >
> > -----Original Message-----
> > From: Adrian Custer [mailto:ac...@gm...]
> > Sent: Tuesday, July 11, 2006 12:14 PM
> > To: Natarajan, Senthil
> > Cc: Geotools users list
> > Subject: RE: [Geotools-gt2-users] Generating Map for set of Lat/Long
> > Points
> >
> > Hey,
> >
> > You have the right idea. You use JTS classes to make the geometry=20
> > (through coordinates) and then the Geotools classes to make a CRS=20
> > and then you put them together to make a Feature.
> >
> > I'm working on the tutorials you will want but don't have them yet.=20
> > I'll attach three pieces I have.
> > (1) mucks around with jts geometries
> > (2) makes a feature *without* a CRS
> > (3) makes a feature with a CRS
> > you should be able to sort through and figure things out. If not,=20
> > you'll have to wait for my tutorials.
> >
> > cheers,
> > adrian
> >
> >
> >
> > On Tue, 2006-07-11 at 11:50 -0400, Natarajan, Senthil wrote:
> > > Hi Adrian,
> > > Thanks for the info and I appreciate.
> > >
> > > Here is the more detail about the data. You are right those are=20
> > > UTM Projected points.
> > > UTM Grid Zone: 10S
> > > "UTM-X, m:" 560531
> > > "UTM-Y, m:" 4181786
> > > Datum: 1927 NAD
> > >
> > > What I want to do is, just to start with, I need to create a map=20
> > > for these points. X,Y
> > > 566469,4181502
> > > 567309,4177908
> > > 567306,4178221
> > > 563567,4182488
> > > 563601,4182221
> > > 560531,4181786
> > >
> > > I created a map manually using ArcGIS, by just opening the above
> > points
> > > saved in a .txt file. Please find the attached map file.
> > >
> > > I just want to do produce the same map programmatically by using=20
> > > some open source GIS API. Is it possible to do this by using JTS?
> > >
> > > Do I need to create some coordinate points like this........=20
> > > Coordinate ptc =3D new Coordinate(14.0d,14.0d);
> > >
> > > // Create an array and add the coordinates for a line
> > > Coordinate[] lsc =3D new Coordinate[7];
> > > lsc[0] =3D new Coordinate(5.0d,5.0d);
> > > lsc[1] =3D new Coordinate(6.0d,5.0d);
> > > lsc[2] =3D new Coordinate(6.0d,6.0d);
> > > lsc[3] =3D new Coordinate(7.0d,6.0d);
> > > lsc[4] =3D new Coordinate(7.0d,7.0d);
> > > lsc[5] =3D new Coordinate(8.0d,7.0d);
> > > lsc[6] =3D new Coordinate(8.0d,8.0d);
> > >
> > > I am new to this, it will be great if you could point out some=20
> > > classes which does this (i.e) by taking the above UTM coordinate=20
> > > points and produce the map like the one I attached.
> > >
> > > Thanks,
> > > Senthil
> > >
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Adrian Custer [mailto:ac...@gm...]
> > > Sent: Monday, July 10, 2006 7:36 AM
> > > To: Natarajan, Senthil
> > > Cc: Geotools users list
> > > Subject: Re: [Geotools-gt2-users] Generating Map for set of=20
> > > Lat/Long Points
> > >
> > > Hello,
> > >
> > > This is a great first question. I wish we had a tutorial just to
> > answer
> > > this question and I hope to build one eventually. For now you are
> > going
> > > to have to work your way through some things on your own.
> > >
> > > First, your question is actually incomplete. We could easily=20
> > > generate
> > a
> > > data set with a point at each of those coordinates, as I will=20
> > > explain below. However, if you then expect to match these=20
> > > coordinates to other geographic data, you have to have slightly=20
> > > more information, namely
> > the
> > > projection system you are using. Your data do not seem to be
> > longitudes
> > > and latitudes but some other projected data; you will therefore=20
> > > need
> > to
> > > find out what projection they are using.
> > >
> > > If all you want to do is create a file of geometric points at=20
> > > those coordinates, then you are essentially going to be using the=20
> > > JTS
> > library
> > > since this is what Geotools uses. You could look on the JTS web=20
> > > site
> > or
> > > you could read the current documentation prototype at:=20
> > > http://docs.codehaus.org/display/GEOTDOC/Programmers+Manual+Protot
> > > ype
> > > and checkout the tutorial file
> > >
> > http://docs.codehaus.org/download/attachments/50776/GnuGIS_Geotools_
> > Tuto
> > > rial000010_Geometry010_Creation.java?version=3D1
> > >
> > > Note these are both prototypes, in early stages, and so are less
> > elegant
> > > than they could be but they should get you started. However,=20
> > > because
> > you
> > > are not using any projection information,
> > > THIS WILL NOT GIVE YOU POINTS THAT YOU CAN MATCH TO OTHER DATA.=20
> > > You have been warned. To do that you will need to build projection
> > data
> > > and use both your geometry and the projection info to build a=20
> > > geotools feature. I'm hoping to write a tutorial about this=20
> > > shortly. Look
> > around
> > > at the web site for more info.
> > >
> > > It would be nice to have a helper function in Geotools to do this
> > simple
> > > operation and perhaps we can add that eventually.
> > >
> > > Good luck,
> > >
> > > sincerely,
> > > adrian custer
> > >
> > >
> > > On Sun, 2006-07-09 at 19:13 -0400, Natarajan, Senthil wrote:
> > > > Hi,
> > > >
> > > > I was wondering is it possible to generate a Map using GeoTools=20
> > > > API for a set of Lat/Long points.
> > > >
> > > > Basically I need to generate a Map for these Locations.
> > > >
> > > > X, Y
> > > >
> > > > 566469,4181502
> > > >
> > > > 567309,4177908
> > > >
> > > > 567306,4178221
> > > >
> > > > 563567,4182488
> > > >
> > > > 563601,4182221
> > > >
> > > > 560531,4181786
> > > >
> > > >
> > > >
> > > > If it is possible could you point out some example code how to=20
> > > > generate the Map. If it is not possible could you please suggest
> > some
> > > > open source Java API which does this.
> > > >
> > > >
> > > >
> > > > Thanks,
> > > >
> > > > Senthil
> > > >
> > > >
> > > >
> > >
> > --------------------------------------------------------------------
> > ----
> > > -
> > > > Using Tomcat but need to do more? Need to support web services,
> > > security?
> > > > Get stuff done quickly with pre-integrated technology to make=20
> > > > your
> > job
> > > easier
> > > > Download IBM WebSphere Application Server v.1.0.1 based on=20
> > > > Apache
> > > Geronimo
> > > >
> > >
> > =
http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D=
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> > 1642
> > > > _______________________________________________
> > > > Geotools-gt2-users mailing list=20
> > > > Geo...@li...
> > > > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
> > >
>
>
>
>-----------------------------------------------------------------------
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