[Geotools-gt2-users] Fwd: errror converting from Lat/Long to UTM

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Ari,

Geometry is a class from the popular Java Topology Suite (JTS) -
jts-1.10.jar (
http://docs.codehaus.org/display/GEOTDOC/03+JTS+Topology+Suite ),
NoSuchAuthorityCodeException and FactoryException is from the geoapi jar (I
use geoapi-2.2-M1.jar), CRS is from the referencing jar (I use
gt-referencing-2.5-RC1.jar). The imports are these:

import org.apache.log4j.Logger;
import org.geotools.factory.Hints;
import org.geotools.geometry.jts.JTS;
import org.geotools.referencing.CRS;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CRSAuthorityFactory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.PrecisionModel;
import com.vividsolutions.jts.geom.impl.CoordinateArraySequence;
import com.vividsolutions.jts.linearref.LinearLocation;
import com.vividsolutions.jts.linearref.LocationIndexedLine;

you will need the epsg-hsql-2.5-SNAPSHOT.jar and probably the
gt-api-2.5-RC1.jar, gt-main-2.5-RC1.jar, gt-metadata-2.5-RC1.jar. I'm not
sure these are the latest versions available for the respetive jars, but it
is what maven downloaded for me with the following pom dependencies (you
will know what the pom dependencies are if you follow the first project
tutorial at the wiki:
http://docs.codehaus.org/display/GEOTDOC/03+First+Project )

        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-main</artifactId>
            <version>2.5-RC1</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>epsg-hsql</artifactId>
            <version>2.5-SNAPSHOT</version>
        </dependency>

If anyone sees that these versions are incorrect, please shout out (-:

Regards,
Alexandre Pretyman

On Mon, Jan 12, 2009 at 8:09 PM, ari fainchtein <ar...@le...> wrote:

> A,Thanks for the code.  What version are you running? I am using 2.5.1 and
> objects like Geometry, NoSuchAuthorityCodeException, FactoryException, etc
> don't seem to be part of it.  I tried looking in the javadoc and those
> objects dont seem to be there  either.  Could you send me your package
> statements?
>
> thanks
>
> On 13/01/2009, at 3:23 AM, Alexandre Pretyman wrote:
>
> Hi Ari,
> Try the following code and see if it suffice your needs, it is what I wrote
> to convert from WGS84 to UTM, I'm not sure this is the best method, but has
> been working for me so far.
>
> =============================
>
> /**
>  * Conversion utility class to convert from WGS84 to UTM
>  * @author Alexandre Walter Pretyman
>  */
>
> public class ConversionUtil
> {
> private static final Map<Integer, MathTransform> transformMap = new
> HashMap<Integer, MathTransform>();
>
>     private static Logger logger =  Logger.getLogger(ConversionUtil.class);
>  public static Geometry convertWGS84ToUTM(Geometry geom)
>  {
>
> if (geom.getSRID() != 4326)
>  throw new RuntimeException("Geometry's SRID is not 4326 (WGS84),
> Geometry: " + geom);
>
> int utmzone = utmzone(geom.getCoordinate());
> final Integer utmZoneInteger = new Integer(utmzone);
>
> try
> {
> synchronized (transformMap)
>  {
>  MathTransform transform = transformMap.get(utmZoneInteger);
> if (transform == null)
>  {
>  CoordinateReferenceSystem targetCRS = CRS.decode("EPSG:" + utmzone);
>  transform = CRS.findMathTransform(wgs84CRS, targetCRS);
>  transformMap.put(utmZoneInteger, transform);
>  }
> final Geometry transformedGeom = JTS.transform(geom, transform);
>  transformedGeom.setSRID(utmzone);
>  return transformedGeom;
> }
>  }
> catch (NoSuchAuthorityCodeException e)
> {
>  logger.error(e.getMessage(), e);
>  throw new RuntimeException(e);
> }
>  catch (FactoryException e)
> {
>  logger.error(e.getMessage(), e);
>  throw new RuntimeException(e);
> }
>  catch (MismatchedDimensionException e)
>  {
> logger.error(e.getMessage(), e);
>  throw new RuntimeException(e);
>  }
> catch (TransformException e)
>  {
>  logger.error(e.getMessage(), e);
> throw new RuntimeException(e);
>  }
>  }
>
> /**
>  * Returns the EPSG id for the  UTM zone of the given coordinate, this is
> ported from the code
>      * http://wiki.postgis.org/support/wiki/index.php?plpgsqlfunctions
>  * @param coord
>  * @return
>  */
> public static int utmzone(Coordinate coord)
>  {
>  int pref;
> if (coord.y > 0)
>  {
> pref = 32600;
>  }
>  else
> {
> pref = 32700;
>  }
> final int zone = (int) Math.floor((coord.x+180)/6)+1;
> return zone + pref;
>  }
>  static CoordinateReferenceSystem wgs84CRS;
>  static CRSAuthorityFactory factory;
>  static {
>
> try
>  {
> Hints                   hints = new
> Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE);
>  factory = CRS.getAuthorityFactory(true);
>  wgs84CRS = factory.createCoordinateReferenceSystem("EPSG:4326");
>  }
> catch (NoSuchAuthorityCodeException e)
> {
>  logger.error(e.getMessage(), e);
>  throw new RuntimeException(e);
> }
>  catch (FactoryException e)
> {
>  logger.error(e.getMessage(), e);
>  throw new RuntimeException(e);
> }
>  }
> }
>
> =============================
>
> Call convertToUTM() on your Geometries to convert them accordingly.
> There is a problem with this method though, the GeometryFactory of the
> Geometries created by JTS.transform(geom, transform); have the SRID set to
> 0, so even I explicitly set them with  transformedGeom.setSRID(utmzone);
> spatial function called on the geometry (for example, buffer), generate
> other geometries with SRID set to 0, but this is something I have not yet
> managed to find a solution for.
>
> Regards,
> Alexandre Pretyman
>
> On Mon, Jan 12, 2009 at 11:38 AM, Martin Desruisseaux <
> mar...@ge...> wrote:
>
>> ari fainchtein a écrit :
>> > Exception in thread "main" java.lang.IncompatibleClassChangeError:
>> > Implementing class
>>
>> Exception ending in "Error" are usually a compilation problem. In this
>> case, we
>> lack information about the cause of this error - I don't know what is
>> happening.
>> But if you happen to have a chance to recompile GeoTools on your platform
>> (Mac
>> OS), it may be worth. If you have the source code and Maven installed, you
>> only
>> need to execute "mvn install" from the command-line at the root of source
>> directory.
>>
>>        Martin
>>
>>
>> ------------------------------------------------------------------------------
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>>
>
>
>

[Geotools-gt2-users] Fwd: errror converting from Lat/Long to UTM

Toolkit for working with and mapping geospatial data

[Geotools-gt2-users] Fwd: errror converting from Lat/Long to UTM