[GIS] use GeoTools with Gradle

geotoolsjavapostgisshapefile

I am going to implement shapefile uploading from a webform, and ingestion into PostGIS.

One problem I am having is that my project is using Gradle for dependency management.

I am unfamiliar with Gradle and have no idea how to find the right string to get the jars into my project.

Best Answer

GeoTools doesn't seem to exist in maven Central (http://mvnrepository.com/) so you would have to add a repository configuration to your build:

repositories {
   maven {
     url "http://download.osgeo.org/webdav/geotools/"
   }
 }

The syntax for the dependencies is something like:

compile group: 'org.geotools', name: 'gt-shapefile', version: '11-SNAPSHOT'

Related Solutions

[GIS] How to deploy a custom GeoTools datastore to GeoServer

It's been a while since I did this (look for the excel datastore in unmaintained to see my code) - I seem to remember that the key trick is to makesure you have a

META-INF/services/org.geotools.data.DataStoreFactorySpi

in your jar.

[GIS] Writing GeoJSON stream into Shapefile using GeoTools

With help from people in the GeoTools mailing list, I came up with the complete method that takes a JSON InputStream, optionally a known SimpleFeatureType, and a previously created ShapefileDataStore, and returns a shapefile-backed SimpleFeatureSource.

public static SimpleFeatureSource geoJSON2Shp(InputStream input,
        SimpleFeatureType schema, ShapefileDataStore shpDataStore)
        throws IOException {

    FeatureJSON fjson = new FeatureJSON(new GeometryJSON(15));

    SimpleFeatureType featureType = schema;

    if (featureType != null) {
        fjson.setFeatureType(featureType);
    }

    FeatureIterator<SimpleFeature> jsonIt = fjson
            .streamFeatureCollection(input);

    if (!jsonIt.hasNext()) {
        throw new IllegalArgumentException(
                "Cannot create shapefile. GeoJSON stream is empty");
    }

    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = null;

    try {

        // use feature type of first feature, if not supplied
        SimpleFeature firstFeature = jsonIt.next();
        if (featureType == null) {
            featureType = firstFeature.getFeatureType();
        }

        shpDataStore.createSchema(featureType);

        writer = shpDataStore.getFeatureWriterAppend(
                shpDataStore.getTypeNames()[0], Transaction.AUTO_COMMIT);

        addFeature(firstFeature, writer);

        while (jsonIt.hasNext()) {
            SimpleFeature feature = jsonIt.next();
            addFeature(feature, writer);                
        }
    } finally {
        if (writer != null) {
            writer.close();
        }
    }

    return shpDataStore.getFeatureSource(shpDataStore.getTypeNames()[0]);
}


private static void addFeature(SimpleFeature feature,
        FeatureWriter<SimpleFeatureType, SimpleFeature> writer)
        throws IOException {

    SimpleFeature toWrite = writer.next();
    for (int i = 0; i < toWrite.getType().getAttributeCount(); i++) {
        String name = toWrite.getType().getDescriptor(i).getLocalName();
        toWrite.setAttribute(name, feature.getAttribute(name));
    }

    // copy over the user data
    if (feature.getUserData().size() > 0) {
        toWrite.getUserData().putAll(feature.getUserData());
    }

    // perform the write
    writer.write();
}

Best Answer

Related Solutions

[GIS] How to deploy a custom GeoTools datastore to GeoServer

[GIS] Writing GeoJSON stream into Shapefile using GeoTools

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