public override void ViewDidLoad()
{
base.ViewDidLoad();
// Add default base layer
AddOnlineBaseLayer(CartoBaseMapStyle.CartoBasemapStyleVoyager);
// Load ground overlay bitmap
//Bitmap androidMarkerBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.jefferson);
//com.carto.graphics.Bitmap overlayBitmap = BitmapUtils.createBitmapFromAndroidBitmap(androidMarkerBitmap);
Bitmap overlayBitmap = BitmapUtils.LoadBitmapFromFile("jefferson-building-ground-floor.jpg");
// Create two vectors containing geographical positions and corresponding raster image pixel coordinates.
// 2, 3 or 4 points may be specified. Usually 2 points are enough (for conformal mapping).
MapPos pos = BaseProjection.FromWgs84(new MapPos(-77.004590, 38.888702));
double sizeNS = 110;
double sizeWE = 100;
MapPosVector mapPoses = new MapPosVector();
mapPoses.Add(new MapPos(pos.X - sizeWE, pos.Y + sizeNS));
mapPoses.Add(new MapPos(pos.X + sizeWE, pos.Y + sizeNS));
mapPoses.Add(new MapPos(pos.X + sizeWE, pos.Y - sizeNS));
mapPoses.Add(new MapPos(pos.X - sizeWE, pos.Y - sizeNS));
ScreenPosVector bitmapPoses = new ScreenPosVector();
bitmapPoses.Add(new ScreenPos(0, 0));
bitmapPoses.Add(new ScreenPos(0, overlayBitmap.Height));
bitmapPoses.Add(new ScreenPos(overlayBitmap.Width, overlayBitmap.Height));
bitmapPoses.Add(new ScreenPos(overlayBitmap.Width, 0));
// Create bitmap overlay raster tile data source
BitmapOverlayRasterTileDataSource rasterDataSource = new BitmapOverlayRasterTileDataSource(
0, 20, overlayBitmap, BaseProjection, mapPoses, bitmapPoses
);
RasterTileLayer rasterLayer = new RasterTileLayer(rasterDataSource);
MapView.Layers.Add(rasterLayer);
// Apply zoom level bias to the raster layer.
// By default, bitmaps are upsampled on high-DPI screens.
// We will correct this by applying appropriate bias
float zoomLevelBias = (float)(Math.Log(MapView.Options.DPI / 160.0f) / Math.Log(2));
rasterLayer.ZoomLevelBias = zoomLevelBias * 0.75f;
rasterLayer.TileSubstitutionPolicy = TileSubstitutionPolicy.TileSubstitutionPolicyVisible;
MapView.SetFocusPos(pos, 0);
MapView.SetZoom(15.5f, 0);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource source1 = new HTTPTileDataSource(0, 24, TiledRasterUrl);
HTTPTileDataSource source2 = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
MergedRasterTileDataSource mergedSource = new MergedRasterTileDataSource(source1, source2);
var layer = new RasterTileLayer(mergedSource);
MapView.Layers.Add(layer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
protected override void OnCreate(Android.OS.Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource source1 = new HTTPTileDataSource(0, 24, TiledRasterUrl);
HTTPTileDataSource source2 = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
MergedRasterTileDataSource mergedSource = new MergedRasterTileDataSource(source1, source2);
var layer = new RasterTileLayer(mergedSource);
MapView.Layers.Add(layer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
protected override void UpdateBaseLayer()
{
MapView.Layers.Clear();
if (vectorStyleTileType == "raster")
{
Menu.Disable("OSM");
string url = (vectorStyleName == "positron") ? Urls.Positron : Urls.DarkMatter;
TileDataSource source = new HTTPTileDataSource(1, 19, url);
var layer = new RasterTileLayer(source);
MapView.Layers.Add(layer);
}
else
{
Menu.Enable("OSM");
string selection = Menu.GetSelectedValueOf("OSM");
CartoOnlineVectorTileLayer layer = null;
if (selection == "nutiteq.osm")
{
if (vectorStyleName.Split(':')[1] == "default")
{
layer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDefault);
}
else
{
layer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDark);
}
}
else
{
var styleAsset = AssetUtils.LoadAsset(vectorStyleName + ".zip");
layer = new CartoOnlineVectorTileLayer(vectorStyleOSM, new ZippedAssetPackage(styleAsset));
}
MapView.Layers.Add(layer);
}
}
protected override void OnCreate(Android.OS.Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource hillsRasterTileDataSource = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
// Add persistent caching datasource, tiles will be stored locally on persistent storage
PersistentCacheTileDataSource cachedDataSource =
new PersistentCacheTileDataSource(hillsRasterTileDataSource, GetExternalFilesDir(null) + "/mapcache_hills.db");
// Initialize a raster layer with the previous data source
RasterTileLayer hillshadeLayer = new RasterTileLayer(cachedDataSource);
// Add the previous raster layer to the map
MapView.Layers.Add(hillshadeLayer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource tileSource = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
// Add persistent caching datasource, tiles will be stored locally on persistent storage
PersistentCacheTileDataSource cachedSource =
new PersistentCacheTileDataSource(tileSource, Utils.GetDocumentDirectory() + "mapcache_hills.db");
// Initialize a raster layer with the previous data source
RasterTileLayer hillshadeLayer = new RasterTileLayer(cachedSource);
// Add the previous raster layer to the map
MapView.Layers.Add(hillshadeLayer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// USGS Base map: http://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer
string url = "http://basemap.nationalmap.gov/arcgis/services/USGSTopo/MapServer/WmsServer?";
string layers = "0";
HttpWmsTileDataSource wms = new HttpWmsTileDataSource(0, 14, BaseProjection, false, url, "", layers, "image/png8");
RasterTileLayer wmsLayer = new RasterTileLayer(wms);
// Calculate zoom bias, basically this is needed to 'undo' automatic DPI scaling,
// we will display original raster with close to 1:1 pixel density
double zoomLevelBias = Math.Log(MapView.Options.DPI / 160) / Math.Log(2);
wmsLayer.ZoomLevelBias = (float)zoomLevelBias;
MapView.Layers.Add(wmsLayer);
// Animate map to map coverage
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-100, 40)), 1);
MapView.SetZoom(5, 1);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// USGS Base map: http://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer
string url = "http://basemap.nationalmap.gov/arcgis/services/USGSTopo/MapServer/WmsServer?";
string layers = "0";
HttpWmsTileDataSource wms = new HttpWmsTileDataSource(0, 14, BaseProjection, false, url, "", layers, "image/png8");
RasterTileLayer wmsLayer = new RasterTileLayer(wms);
// Calculate zoom bias, basically this is needed to 'undo' automatic DPI scaling,
// we will display original raster with close to 1:1 pixel density
double zoomLevelBias = Math.Log(MapView.Options.DPI / 160) / Math.Log(2);
wmsLayer.ZoomLevelBias = (float)zoomLevelBias;
MapView.Layers.Add(wmsLayer);
// Animate map to map coverage
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-100, 40)), 1);
MapView.SetZoom(5, 1);
}
