Name: geopackage-android
Owner: Boundless
Description: GeoPackage Android Lib
Created: 2015-09-10 11:26:50.0
Updated: 2015-10-20 17:29:38.0
Pushed: 2015-08-24 12:55:50.0
Homepage: null
Size: 14216
Language: Java
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The GeoPackage Libraries were developed at the National Geospatial-Intelligence Agency (NGA) in collaboration with BIT Systems. The government has “unlimited rights” and is releasing this software to increase the impact of government investments by providing developers with the opportunity to take things in new directions. The software use, modification, and distribution rights are stipulated within the MIT license.
If you'd like to contribute to this project, please make a pull request. We'll review the pull request and discuss the changes. All pull request contributions to this project will be released under the MIT license.
Software source code previously released under an open source license and then modified by NGA staff is considered a “joint work” (see 17 USC § 101); it is partially copyrighted, partially public domain, and as a whole is protected by the copyrights of the non-government authors and must be released according to the terms of the original open source license.
GeoPackage Android is a SDK implementation of the Open Geospatial Consortium GeoPackage spec.
The GeoPackage SDK provides the ability to manage GeoPackage files providing read, write, import, export, share, and open support. Open GeoPackage files provide read and write access to features and tiles. Feature support includes Well-Known Binary and Google Map shape translations. Tile generation supports creation by URL or features. Tile providers supporting GeoPackage format, Google tile API, and feature tile generation.
The GeoPackage MapCache app provides an extensive standalone example on how to use the SDK.
// Context context = ...;
// File geoPackageFile = ...;
// GoogleMap map = ...;
// Get a manager
GeoPackageManager manager = GeoPackageFactory.getManager(context);
// Available databases
List<String> databases = manager.databases();
// Import database
boolean imported = manager.importGeoPackage(geoPackageFile);
// Open database
GeoPackage geoPackage = manager.open(databases.get(0));
// GeoPackage Table DAOs
SpatialReferenceSystemDao srsDao = geoPackage.getSpatialReferenceSystemDao();
ContentsDao contentsDao = geoPackage.getContentsDao();
GeometryColumnsDao geomColumnsDao = geoPackage.getGeometryColumnsDao();
TileMatrixSetDao tileMatrixSetDao = geoPackage.getTileMatrixSetDao();
TileMatrixDao tileMatrixDao = geoPackage.getTileMatrixDao();
DataColumnsDao dataColumnsDao = geoPackage.getDataColumnsDao();
DataColumnConstraintsDao dataColumnConstraintsDao = geoPackage.getDataColumnConstraintsDao();
MetadataDao metadataDao = geoPackage.getMetadataDao();
MetadataReferenceDao metadataReferenceDao = geoPackage.getMetadataReferenceDao();
ExtensionsDao extensionsDao = geoPackage.getExtensionsDao();
// Feature and tile tables
List<String> features = geoPackage.getFeatureTables();
List<String> tiles = geoPackage.getTileTables();
// Query Features
String featureTable = features.get(0);
FeatureDao featureDao = geoPackage.getFeatureDao(featureTable);
GoogleMapShapeConverter converter = new GoogleMapShapeConverter(
featureDao.getProjection());
FeatureCursor featureCursor = featureDao.queryForAll();
try{
while(featureCursor.moveToNext()){
FeatureRow featureRow = featureCursor.getRow();
GeoPackageGeometryData geometryData = featureRow.getGeometry();
Geometry geometry = geometryData.getGeometry();
GoogleMapShape shape = converter.toShape(geometry);
GoogleMapShape mapShape = GoogleMapShapeConverter
.addShapeToMap(map, shape);
// ...
}
}finally{
featureCursor.close();
}
// Query Tiles
String tileTable = tiles.get(0);
TileDao tileDao = geoPackage.getTileDao(tileTable);
TileCursor tileCursor = tileDao.queryForAll();
try{
while(tileCursor.moveToNext()){
TileRow tileRow = tileCursor.getRow();
byte[] tileBytes = tileRow.getTileData();
Bitmap tileBitmap = tileRow.getTileDataBitmap();
// ...
}
}finally{
tileCursor.close();
}
// Tile Provider (GeoPackage or Google API)
TileProvider overlay = GeoPackageOverlayFactory
.getTileProvider(tileDao);
TileOverlayOptions overlayOptions = new TileOverlayOptions();
overlayOptions.tileProvider(overlay);
overlayOptions.zIndex(-1);
map.addTileOverlay(overlayOptions);
// Feature Tile Provider
FeatureTiles featureTiles = new FeatureTiles(context, featureDao);
TileProvider featureOverlay = new FeatureOverlay(featureTiles);
TileOverlayOptions featureOverlayOptions = new TileOverlayOptions();
featureOverlayOptions.tileProvider(featureOverlay);
featureOverlayOptions.zIndex(-1);
map.addTileOverlay(featureOverlayOptions);
// URL Tile Generator
TileGenerator urlTileGenerator = new UrlTileGenerator(context, geoPackage,
"url_tile_table", "http://url/{z}/{x}/{y}.png", 2, 7);
int urlTileCount = urlTileGenerator.generateTiles();
// Feature Tile Generator
TileGenerator featureTileGenerator = new FeatureTileGenerator(context, geoPackage,
featureTable + "_tiles", featureTiles, 10, 15);
int featureTileCount = featureTileGenerator.generateTiles();
// Close database when done
geoPackage.close();
The following repositories must be built first (Central Repository Artifacts Coming Soon):
Build this repository using Android Studio and/or Gradle.
Include as repositories in your project build.gradle:
repositories {
jcenter()
mavenLocal()
}
Include the dependency in your module build.gradle with desired version number:
compile "mil.nga.geopackage.android:geopackage-sdk:1.0.0"
As part of the build process, run the “uploadArchives” task on the geopackage-android Gradle script to update the Maven local repository.
Replace the normal build dependency in your module build.gradle with:
compile project(':geopackage-sdk')
Include in your settings.gradle:
include ':geopackage-sdk'
From your project directory, link the cloned SDK directory:
ln -s ../geopackage-android/geopackage-sdk geopackage-sdk