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Specify EPSG transformation method in GeoTools

How to specify transformation method when using ogr2ogr to reproject geometry?geotools / jts crs transformation result not at correct positionUpgrading GeoToolsGeoTools exception: failed to connect to EPSG databaseDifferent definition of EPSG:3857 in GeoTools and QGISIs geotools transformation of EPSG:3785 (Web mercator) to EPSG:4326 wrong?Unable to transform from EPSG:3857 to UTM in GeotoolsErroneous transformation with GeotoolsGeotools: Unexpected result reprojecting bounding box to EPSG:3035GeoTools: grid transformation using NTv2Transform - error locating grid fileHow to set SRS to 'EPSG:4326' in geotools?

0

Firstly apologies, I am a software developer who knows a bit about Gis/Geodesy, but I am not an expert so I might misuse terminology somewhat.... Hopefully you will all understand tha basis of the question nethertheless... ;o)

I have been tasked to extend an app in Java and have a need to transform data from one Coord System to another. We started using GeoTools which lets us transform using EPSG codes.

    private MathTransform getMathTransformForEpsgCode(String epsgCode) throws FactoryException {

    MathTransform sourceToTargetConversion = null;

    try {

        // Get the result SourceCRS

        CoordinateReferenceSystem sourceCRS = CRS_FACTORY.createCoordinateReferenceSystem(epsgCode);

        // Create and apply Transform

        sourceToTargetConversion = CRS.findMathTransform(sourceCRS, TARGET_CRS);

    } catch (NoSuchAuthorityCodeException e) {

        log.info("No CRS found for code, assuming it is a transform", e);

        throw e;

    }



    return sourceToTargetConversion;

}

Which was then used something like the following

JTS.transform(coordinate, coordinate, returnedMathtransform);

HOWEVER, what we want to do is actually specify the math transformation method used (Note: I think this is akin I think to this question "How to specify transformation method when using ogr2ogr to reproject geometry?".

Is this possible with GeoTools?

• Ideally specifying the math transform using an ESPG code (i.e. http://epsg.io/27700-5339)


• Alternativly specifying 3 or 7 parameters

So I am a wee bit out of my depth here (but learning fast). I believe the above can be accomplished using a (licensed) ESRI java api. Can it be achieved easily in GeoTools or any other open source libraries, again ideally usable as a java api and not the command line.

Cheers

geotools

share|improve this question

asked 12 mins ago

KieronFlynnKieronFlynn

385

add a comment | 

0

Firstly apologies, I am a software developer who knows a bit about Gis/Geodesy, but I am not an expert so I might misuse terminology somewhat.... Hopefully you will all understand tha basis of the question nethertheless... ;o)

I have been tasked to extend an app in Java and have a need to transform data from one Coord System to another. We started using GeoTools which lets us transform using EPSG codes.

    private MathTransform getMathTransformForEpsgCode(String epsgCode) throws FactoryException {

    MathTransform sourceToTargetConversion = null;

    try {

        // Get the result SourceCRS

        CoordinateReferenceSystem sourceCRS = CRS_FACTORY.createCoordinateReferenceSystem(epsgCode);

        // Create and apply Transform

        sourceToTargetConversion = CRS.findMathTransform(sourceCRS, TARGET_CRS);

    } catch (NoSuchAuthorityCodeException e) {

        log.info("No CRS found for code, assuming it is a transform", e);

        throw e;

    }



    return sourceToTargetConversion;

}

Which was then used something like the following

JTS.transform(coordinate, coordinate, returnedMathtransform);

HOWEVER, what we want to do is actually specify the math transformation method used (Note: I think this is akin I think to this question "How to specify transformation method when using ogr2ogr to reproject geometry?".

Is this possible with GeoTools?

• Ideally specifying the math transform using an ESPG code (i.e. http://epsg.io/27700-5339)


• Alternativly specifying 3 or 7 parameters

So I am a wee bit out of my depth here (but learning fast). I believe the above can be accomplished using a (licensed) ESRI java api. Can it be achieved easily in GeoTools or any other open source libraries, again ideally usable as a java api and not the command line.

Cheers

geotools

share|improve this question

asked 12 mins ago

KieronFlynnKieronFlynn

385

add a comment | 

Firstly apologies, I am a software developer who knows a bit about Gis/Geodesy, but I am not an expert so I might misuse terminology somewhat.... Hopefully you will all understand tha basis of the question nethertheless... ;o)

I have been tasked to extend an app in Java and have a need to transform data from one Coord System to another. We started using GeoTools which lets us transform using EPSG codes.

    private MathTransform getMathTransformForEpsgCode(String epsgCode) throws FactoryException {

    MathTransform sourceToTargetConversion = null;

    try {

        // Get the result SourceCRS

        CoordinateReferenceSystem sourceCRS = CRS_FACTORY.createCoordinateReferenceSystem(epsgCode);

        // Create and apply Transform

        sourceToTargetConversion = CRS.findMathTransform(sourceCRS, TARGET_CRS);

    } catch (NoSuchAuthorityCodeException e) {

        log.info("No CRS found for code, assuming it is a transform", e);

        throw e;

    }



    return sourceToTargetConversion;

}

Which was then used something like the following

JTS.transform(coordinate, coordinate, returnedMathtransform);

HOWEVER, what we want to do is actually specify the math transformation method used (Note: I think this is akin I think to this question "How to specify transformation method when using ogr2ogr to reproject geometry?".

Is this possible with GeoTools?

• Ideally specifying the math transform using an ESPG code (i.e. http://epsg.io/27700-5339)


• Alternativly specifying 3 or 7 parameters

So I am a wee bit out of my depth here (but learning fast). I believe the above can be accomplished using a (licensed) ESRI java api. Can it be achieved easily in GeoTools or any other open source libraries, again ideally usable as a java api and not the command line.

Cheers

geotools

share|improve this question

asked 12 mins ago

KieronFlynnKieronFlynn

385

    private MathTransform getMathTransformForEpsgCode(String epsgCode) throws FactoryException {

    MathTransform sourceToTargetConversion = null;

    try {

        // Get the result SourceCRS

        CoordinateReferenceSystem sourceCRS = CRS_FACTORY.createCoordinateReferenceSystem(epsgCode);

        // Create and apply Transform

        sourceToTargetConversion = CRS.findMathTransform(sourceCRS, TARGET_CRS);

    } catch (NoSuchAuthorityCodeException e) {

        log.info("No CRS found for code, assuming it is a transform", e);

        throw e;

    }



    return sourceToTargetConversion;

}

JTS.transform(coordinate, coordinate, returnedMathtransform);

share|improve this question

asked 12 mins ago

KieronFlynnKieronFlynn

385

share|improve this question

asked 12 mins ago

KieronFlynnKieronFlynn

385

asked 12 mins ago

KieronFlynnKieronFlynn

385

asked 12 mins ago

KieronFlynnKieronFlynn

385