topic Re: Loading offline tile package over offline raster map in Qt Maps SDK Questions

Loading offline tile package over offline raster map

Girishchandra_Yendargaye — Fri, 08 Mar 2019 12:21:09 GMT

Hello Team,

We are trying to load tile package over a offline raster map but its not visible...

Same thing if we do with on online topographic basemap its properly fitting over world map.

Can you please tells us whats wrong in doing this..

Thank you,

Re: Loading offline tile package over offline raster map

LucasDanzinger — Fri, 08 Mar 2019 18:21:12 GMT

Do you have some code you can share that reproduces the issue?

Re: Loading offline tile package over offline raster map

Girishchandra_Yendargaye — Mon, 11 Mar 2019 06:00:40 GMT

Yes...Simple below lines of code

void TestRastre::componentComplete()

    QQuickItem::componentComplete();

    // find QML MapView component

    m_mapView = findChild<MapQuickView*>("mapView");

    m_map = new Map();

    // Set map to map view

    m_mapView->setMap(m_map);

    //girishy Create raster

    Raster * raster = new Raster( "INDIA_841.tif");

    // girishy create raster layer

    RasterLayer *rasterLayer = new RasterLayer(raster);

   m_map->basemap()->baseLayers()->append(rasterLayer);

    QString datapath="Hyderabad.tpk";

    QString name="test";

    //girishy Create tiled layer

    TileCache * tiledCache = new TileCache(datapath);

    // girishy create tiled layer

    ArcGISTiledLayer *tiledLayer = new ArcGISTiledLayer(tiledCache);

    tiledLayer->setName(name);

    m_map->basemap()->baseLayers()->append(tiledLayer);

Re: Loading offline tile package over offline raster map

LucasDanzinger — Sun, 12 Dec 2021 00:33:30 GMT

I'd try the below workflow instead. It is preferable to create the Map using one of the constructors other than the default. For example, create it from a Basemap object, which will give it a valid spatial reference. However, you may run into issues if your RasterLayer and TPK are in different spatial references. RasterLayer can project on the fly to a new spatial reference, but TPK cannot

void TestRastre::componentComplete()
{
    QQuickItem::componentComplete();

    //girishy Create raster
    Raster * raster = new Raster( "INDIA_841.tif", this);

    // girishy create raster layer
    RasterLayer *rasterLayer = new RasterLayer(raster, this);

    // find QML MapView component
    m_mapView = findChild<MapQuickView*>("mapView");

    // Create Map from Basemap
    auto basemap = new Basemap(rasterLayer, this);
    m_map = new Map(basemap, this);

    // Set map to map view
    m_mapView->setMap(m_map);


    // create TPK
    QString datapath="Hyderabad.tpk";
    QString name="test";
    //girishy Create tiled layer
    TileCache * tiledCache = new TileCache(datapath, this);
    // girishy create tiled layer
    ArcGISTiledLayer *tiledLayer = new ArcGISTiledLayer(tiledCache, this);
    tiledLayer->setName(name);
    m_map->operationalLayers()->append(tiledLayer);
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Loading offline tile package over offline raster map

Girishchandra_Yendargaye — Tue, 12 Mar 2019 09:44:15 GMT

This way also its not working...

Re: Loading offline tile package over offline raster map

LucasDanzinger — Thu, 14 Mar 2019 14:53:57 GMT

Hard to say what the issue is. My best guess would be the spatial references mismatch and the TPK cannot project on-the-fly.

Re: Loading offline tile package over offline raster map

GirishchandraY — Mon, 26 Oct 2020 05:15:53 GMT

Yes spatial reference mismatch.

Can you please suggest how to enable project on-the-fly for TPK.

Re: Loading offline tile package over offline raster map

LucasDanzinger — Mon, 26 Oct 2020 18:40:25 GMT

TPKs cannot be projected on the fly in ArcGIS Runtime. There are a few options:

1) Re-author your TPK in the proper spatial reference

2) Instead of making your Raster the basemap, set the TPK as your basemap and add the Raster as an operational layer (Rasters CAN project on the fly)

Re: Loading offline tile package over offline raster map

MahendraMannepalli — Wed, 07 Apr 2021 11:52:00 GMT

can you please help me brother.i want india.tpk files.this is my mailid:

mannepallimahendra001@gmail.com